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Beseler Topcon Auto 100 - direct User manual

User manual for Beseler Topcon Auto 100 - direct. 59 pages in English. Read the original PDF, download or print a copy without registration.

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Brand
Beseler
Model / document
Beseler Topcon Auto 100 - direct
Document type
User manual
Language
English
Pages
59
File size
8.1 MB
Category
Film cameras
Document date
Not specified in catalog

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Page 2 · Read text
v-

                        EIECTR.IC-EYE PICTURE.TAKING
            l.  Set film speed (ASA 25 to 4OO or DIN t 5 to 271.
       2. Set shutter speed, (l/S ro t/5OO sec.).
       3. Set operture rlng lo AUTO.
       4. Advonce film wlndlng levero                            '
       5. Vlew-focus through the lens, ond check operture reodlng.
       6.  Press shutler releose button.

                                  ITVIPOR.TANT
            l.  Don't touch lhe surfoce of lhe tens, mlrror, eyeplece, qs well qs exposure
          wlndow.
       2.  Stroke the film wlndlng lever oll the woy - untll ll slops.
       3. Wolr unlll lhe shuller octlon ls completed before slroklng the film wlndlng
             lever.
       4. Gover the lens when nol ln use.
       5. Don'l force moyements but re-reod lnslructlons once more.
        i6. lf your BESELER TOPCON AUTO TOO comero needs repolr, don'f do lr yourself
          bul conloct the neoresi crulhorlzed deoler.
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Page 6 · Read text
But, besides these bosic requirements, the
BESETER TOPCON AUTO IOO     comero olso incorporotes oll the complicoted
CATUIERA                                  mechonism thqt moke picture-toking completely
                                                     outomotic, such os:-
Congrotulolions, on your choice of the BESELER                                                                          l.  Fully outomotic instont re-opening lens dio-TOPCON AUTO 100 comero which hos been                                           phrogm qciion-f or holding the lens otdesigned by our engineers ond opticol scientists
to give on ideol comero fulfilling the following       wide operture, for view-focusing eose, but
                                                                                                              se-bosic requirements:-                               stopping it down outomqticolly to the
                                                       lected operture for the shutter oction qnd
 l.  Single lens reflex-for viewing ond focus-       then re-opening it once more to wide
   ing of the exoct subiect imoge os it will          operture.
   be coptured on the film.
                                            2. Quick-os-o-wink mirror oction__which,  in2. Electric-Eye outomotion-for outomoticolly                                              coupled oction with the outomotic lens    setting the correct exposure to the comero                                                                   .  diophrogm oction, swings the mirror up   simply by pointing it ot the subiect.                                         ond out of the woy for shooting ond then
3. Complete lens  interchongeobility-for        snops it down once more, quick-os-o-wink,
   chonging from the slondord to the wide-        for view-focusing.
   ongle or telephoto os the requirements of                                            3. Single stroke film winding lever oction-   the picture moy demond.                                               not only odvonces the film one frome, but
4. Superior UV lens cooting-for producing        qdvqnces the exposure counter, chorges
    crisper block-ond-white shots ond lrue-to-        the shutter qnd sets up the oulomqtic lens
     life color pictures.                            diophrogm oction.

 I
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Page 8 · Read text
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1, Automotic re-setting odditive exposure     exposures, the person who wonts o comero
    counter.                                  with o choice of wide-ongle or telephoto
5. Automotic pop-up rewind button.               lenses, which ore not ouxiliory lenses or which
                                               leove behind some component ond merely ex-
And, os on odditionol bonus, the comero olso     chonge the front elements, to the person who
hqs :--                                      would iust rother set exposures occording to
l.  Complete electric-eye outomotion with qll     experience,--becouse the comero is not o
    interchongeoble  lenses.                         simple outomotic comero but o well-built ond
                                                designed comero which will sotisfy even the2. Speciol UV filter effect on oll interchonge-                                         demonds of the odvonced omoteur.   oble lenses.
                                                                                                       sug-3. Aperture scole visible in finder, even with     While operofion is very simple, moy we                                             gest thot you reod the instructions through    electric-eye qutomolion.
                                                    corefully so thot you fomiliorize yourself with4. Monuol over-ride of electric-eye outomo-                                                             its working ports before you even lood film    tion for shutter coupled exposure seilings                                                    in the cctmero.   or comptete freedom in exposure settings.
ln other words, the comerq is the ideol fomily
comerq becouse it con be used by every
member of the fomily, from the person who
only wonts on outomotic comerq to toke cqre
of oll exposure setting problems, the person
who wonts q built-in exposure meter coupled
to the comero for some freedom to odiust
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Page 9 · Read text
SPECIFICATION

       Lens:
            UV Topcor I : 2 f-53mm 6 element stondord lens. Fully outomotic instqnt re-opening
                  lens diophrogm. Stroight helicoid focusing from 70cm to infinity. Boyonet mount lens.
                   interchqngeobility of complete lens.
                  Apertures t  tf 2, 2.8, 4, 5,6, 8,  I l, 16 ond 22,
       Shutter:
              SEIKOSHA SLV behind-lens type.
                                                           1160, lll2s, ll2so & t/500 sec.      .        speeds: B, t, ll2, tl4, lll,  tlts, llg0,               MXV-switch (for M ond X settings flosh synchronizotion ond self-timer).
       Flnder:
                Fixed eye-level Pentoprism ftnder, with 0.75X imoge (stqndord lensl, ond 34.5X23mm
                  ffnder screen.
              With TOKOBRITE fresnel lens plote ond micro-prism focusing spot,
               Meter needle ond operture scole, indicotes operture reodings.
      Exposure:
         AufO-Electric-eye  oulomqtion.
             Ronge: EV 5 to EV 18, with ASA 100 ftlm.

          3




g
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          Film speeds: ASA 25 to 400 (DlN 15 to 271.
          Shutter speeds z  118 to l/500 sec.
  COUPTED-Shutter  coupled exposure setting.
       Ronge: EV 5 to EV 18, with ASA 100 fflm.
          Film speeds: ASA 25 to 400 (DlN 15 to 271.
         Shutter speeds z  ll8 to l/500 sec.
  MANUAT-Complete freedom in opertures/shutter speeds.
       Ronge: EV 2 to EV 18, with ASA 100 film.
          Film speeds: ASA 25 to 400 (DlN 15 to 27!,.
         Shutter speeds: B, I to l/500 sec.
Fllm Wlndlng:
        180" single stroke.
Other Feotures:
      Red worning oreo indicoting outomotic exposure is not possible (shutter moy be
          releosed).
       Wink mirror system (instont return nrirror octionl.
         Automotic pop-up rewind button.
         Fixed occessory shoe.
S'lze & Weighr:
        With stondord lenr: l36mmX93mmX84mm; 840 groms.
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@ lnfrored index       @ Dirtonc" focusing ring    @ Accessory sboe
@ Distonce (operture) index   @ fitr  plone indicotor     @ Shoulder slrop lug
@ Distonce scote       @ Eyepiece                 .@ Bock cover lock
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                                           www.butkus.us




    flonge          @ Bock cover lock       @ MXV-switch
@ fitm tronsport sprocket    @ Bock cover cotch      @ Bottery cover@ film pressure plote     @ flosh socket
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GORR,ECT EXPOSUR,E                                l.  Eleclric-eye outomotion.
One of the most importont foctor for toking     2. Coupled exposure setting.
better pictures is correct exposure, which is     3. Free exposure setting.
the relstionship between-
l. The shutter speed, ond                                      ELECTRIC-EYE AUTOfrTATION  :
2. The operture (lens opening), os decided by                                                 Presuming thot the film is olr'eody looded in3. The brightness of lhe subiect, ond depend-                                          the comero ond the film speed set to the   ent on                                            comero, the only octions required for toking
4. The sensitiviiy (spced) of the fitm looded      pictures ore   :
    in lhe comero.                                                  -                                                                          l.  Set the shutter speed ring (7) lo one of
ln other words, it is importont to be oble to         red-colored speeds l/500 to l/8 sec., by
correctly iudge the brightness of the subiect,         revolving the ring until the required speed
in order to determine the correct operture to          is opposite the index.
be used, becquse film speed is pre-determined
                                             The shutter speeds will click-stop into ploce.by the film used ond shutter speed is, more
often thqn not, decided by the qction of the       Use the shutter speed guide for choosing
subiect.                                       the most suitoble speed for the lighting
ln the BESELER TOPCON AUTO 100 comero         condition or oction.
three methods of setting the correct exposure       2.      the operture ring (8) to AUTO, which
odiustments to the lens ond shutter ore pos-               set the electric-eye system into opero-
sible-

?
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Page 17 · Read text
hove the efrect of moving the exposure
                                                 needle towords the middle oreo, in both
                                                      coses, where the picture con be token.
                                      When revolving the shutter speed ring, in
                                           the obove instonces, do not move the
                                                        shutter speed scole outside the l/500 to
                                                         l/8 sec. ronge.
                                           The shutter con be releosed even when
                                               the needle is in the red oreos so the posi-
                                                             tion of the needle musl olwoys be checked.
                                www.butkus.us      Of course, it  is token for gronted thot the
                                                                                                       well3. Check the operture scoles seen on the      ftlm winding lever is olso odvonced, os
    left border of the finder ond if ihe ex-     os view-focusing being undertoken, before the
   posure needle is not in the red worning      shutter is releosed.
   oreos ond is sotisfoctoryr press the shutter                               GOUPLED EXPOSURE SETTING:   button (6), ond lhe picture will be token.
     lf the exposure needle is in the top red    When the subiect hos too much controst, or
   oreo, the picture will be under-exposed,     the bock-light is brighter thon the front-light,
   while, if  in the bottom red oreo, the    or  if you wont to toke o close-up reoding
    picture will be over-exposed.  lf the former,    ond then move bock for the shot, or other-
    revolve the shutter speed ring to the left,     wise wont to odiust the operture setting to
   ond, if the loter, to the right, which will     toke into occount possible over- or under-ex-
 il
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Page 18 · Read text
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 posure on electric-eye outomqtion, try coupled    eye outomotion, but within the ronge l/500
 exposure selting:-                           to l/8  sec., ond ftnd the right combinotion
                                             of shutter speed ond operture. l.  Set the shutter speed to one of the red-
    colored shutter speeds,  i.e., from l/500 to     Coupled exposure setting is suitoble for those
    l18 sec., the some os for  electric-eye      shots in which-
    outomotion.                                                     l. The bockground is very light ond coverg
2. Toke the operture ring off AUTO, by      o greoter oreo thon the moin subiect of
    revolving it to ony other setting on the           interest, which is olso dorker; becouse the
     ring.                                           exporure reoding will be dominoted by the
3. Point the cqmerq lens of the subiect ond          lighter bockground ond the moin interest
                                                                   will be under-exposed. For exomple, shots    reqd the operture setting indicoted on the
                                                   ogoinst distont scene, or ogoinst snow-    operture scole in the ftnder.
                                                     scopes, etc.
4, Tronsfer the operture reoding to the oper-                                             2. The opposite of the obove, such os in   ture ring, i.e., revolve the operture ring
    until the sqme operture is opposite the        night clubs, circuses, etc., in which the
   index (l  I ), or modify  it ond then tronsfer         reoding will be dominoted by the dorker
     it, if this is preferred.                         bockground ond the moin interest will be
                                                      over-exposed.
5. Press the shutter releose button.                                             3. The moin subiect is bock-lighted, becouse
Incidentolly, if the exposure needle is in the        the subiect's foce will not be illuminoted
red worning oreos, revolve the shutter speed       by the moin light ond will be under-ex-
ring, in the some monner noted for electric-        posed, if the reoding is loken for the full
                                                                                                       l2
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Page 19 · Read text
subiecl oreo.                              3. Controsfy subiect: First decide whot ef-
4. The moin subiect is in the shode, becouse          fect you ore looking for in the ftnql picture
   the reoding will ogoin be dominoted by       ond toke on exposure reoding of the por-
   the surrounding light ond will thus be         lion which interests you the most, letiing
    under-exposed.                              lhe controsty portion (lighter or dorkcr
                                                        portionI get lighter or dorker, os the cose
For the obove shols, os well os for other      moy be.
shots, the exposure reroding should be token
os follows:-                                 4. lnoccessible subjects:  lf the subiect is ioc
                                                   fqr off, toke on exposure reoding of o l.  Londscope:. Shield the comero toking lens                                                                   similior subiect (i.e., some texture ond light-    (341 trom lhe light reflected by the sky                                                    ing condition) ot close distonce.   ond point it so thot it will be toking o
   reoding of on oreo hoving less sky thon       5.  Bock-lighted subiect: The best method is
   the generol overoll. scen6, becouse the sky        to move in ond toke o close-up exposure
    is much brighter thon the generol scene         reoding of the front-lighted subiect oreo
   ond if too much sky is included the overoll         only, using core to see thof the bock-light
    effect will be over-exposure.                   does not effect the reoding. Otherwise,
                                               modify the exposure reoding token ot the2.  Subiect ogoinst the open sky:  When                                                         picture-toking position 3 or 4 times to toke   shooting oirplones, flogs, buildings,  etc.,                                                    into occount the excessivs controst be-   ogoinst on opcn exponso of sky, toke on                                                 tween the bock-light ond the front-lighted   exposure reoding of o similior obiect with
   the light striking  it ot the some ongle os         oreq.
   the subiect ond modify  it by l/2 stop less.       6.  Portroit: Move in close ond toke o reqd-
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ing of lhe foce oreo thot should stond          be unusoble even when the exposure
out in   f he finol picture. lf  controst is             needle is not in the red worning oreos.
€xtreme, between the high-lights ond shod-              This is especiolly when o fost film isows, loke o reoding of both portions ond                                              used ot o slow shutter speed, or ooveroge it, if you wont both porlions, or                                                        slow'film used ot the fostest shutterotherwise.toke o reoding of the interesting
portion ot obout 4 inches or so. See thqt            speed. The following combinotions of
the comero's shodow is not cost on the               shutter speed ond f stops should never
oreo being reod.                            be ralied upon for setting exposure.
Note:                                       ASA 400 film fl2 & l/8 sec.(l) When using the f/3.5 wide-ongle or                               ASA 50 film ll22 & l/500 sec.     f/4 telephoto lenses, it is not possible                               ASA 25 film 1116 & l/500 sec.    to toke shots ot lorger opertures
    thon the moximum operture of the           (3)  To use o shutter speed slower thon     lens ottoched to the comero. Thus,                                                         l/8 sec., use the operture reoding for       if the exposure needle indicqtes o                                                         l/8 sec. in order to toke o reoding.
    reoding of  fl2 or f12.8, etc., the           Then re-odjust, by stopping down the     shutter speed ring should be revolved                                                      lens diophrogm by the some number    to o slower spead, in order to bring                                                of steps os the exposure time is    the needle within moximum opening                                                         increosed, bs follows :-    of the lens used.
l2l When using film other thon ASA 100                Shutter speed , ll8-ll1-112-1
    ond 200, the exposure reoding con                Aperture z      '4'*5.6-    I        I                                                                                                                   -l
                                                                                                        l4
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FREE EXPOSURE SETTING:                   foster speed is needed for movement neorer
                                                     to the cqmero, (3) o foster speed is required
         Alihough only full numbers ore used on the     for o subiect moving porollel to the comero,
          ring, it should be remembered thot 500 is     while o slower spced rnoy be used for move-
         l/500 sec., ond I  is q full  I  sec. ond thot,    ment towords or owqy from the comero, ond
            theref ore, the lorger number is the  f oster      (41 the degree of stopping required will olso
                                                                                             used.         speed, meoning thot the shutter remoins open     determine the speed to be
         only for o t/S0O sec. durotion during which    The operture ring hos operlures or openings,
         time the light posses only 112 os long os the     cqlled f/numbers, with exposure rotios, os
         preceding lorger number ond vice verso ; thus     follows:-
              if lighting conditions remoin unchonged, de-    Aperture    2 2.8 4 5.6 8   ll  16 22
          creosing the speed will meon thot the operture     Exposure rctio 114 ll2   I  2 4 8 15 30
          will hove to be opened to compensote for                                             The operture or lens opening controls the
          less light.                                                    omount of light thot enters the lens ond posses
       The choice of shutter is .dependent on the     through to the film plone, by odiusting the lans
          lighting condition, os well os the need for     opening os required. lt con be seen thot the
         stopping oction. The brighter the light, the     lorger numbers ore the smoller openings ond
          foster the speed thot moy be used, ond vice     vice verso ond thot eoch smoller operture
        verso. On the other hond, for stopping oc-     permits only ll2 the omount of light of the
            tion, it should be noted thot (l) o foster speed      preceding lorger operture ond thot, therefore,
          is required lor o speedier subiecf, l2l  o        if lighting conditions remoin unchonged, stop-

            r5
I
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 ping down will require o corresponding in-            besides this, there ore vorious other creose in the shutter speed.                     -but,reloted octions which oll toke ploce in less
                                                                                                                                                            is ln other words,  if the shutter speed is originol-     thon l/lOth of o second when the shutter
 ly set to 1160 sec. for f/8, then it must be     pressed, such os :-
 increosed to 11125 if the operture is opened        l.  The shuiter blqdes close down completely.
 to f 15.6 or to l/30 if lhe operiure is stopped     2. The reflex mirror rises, lhe ftlm blind opens
 down to f/l l.                                            fully ond the lens diophrogm is stopped
 Exposure settings in this cose will hove to be        down.
 decided by:                                  3. The shutter blodes open ond close (for
 l.  Using o suitoble'exposure met6r, or,              loking the picture).
                                                                                                        rgturns2, Using on €xposure chort, such os is usuol-     4. The film blind opens, the  mirror                                                                                                        lens    ly included with rhe film, or,                     lo ref,ex viewing position, ond the                                               diophrogm opens fully.3. Moking your decision bosed on post ex-    perience.                                  5. The shutter blodes open fully.
                                        The ociion of the lens diophrogm  is the result
SHUTTER AGTION:                         of the "fully outomotic instqnt re-opening lens
                                            diophrogm ection", while thot of the reflex
Since oll the UV TOPCOR lenses ore equipped     mirror is the product of the "quick-os-o-wink
with the fully outomotic lens diophrogm oc-     mirror oction", both of which ore required fo
tion, the lens opening is olwoys opened ot the     produce the fost oction required for loking
widest operture for view-focusing eose. This     the picture without loss of imoge.meons thot the lens diophrogm must outo-                                   When using slow shutter speeds, olwoys woitmoticolly close down to the required opening
when the shutter button is pressed, ond then      until the shutter oction is ffnished before od-
open immediotely bqck to lhe widest opsrturo     voncing lhe film winding lever.
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SELF-TIMER:                    vtEw-FocustNG
For the purpose of deloying the octuol shutter    Two other importont foctors for getting belter
releose oction for l0 sec., ofter the shutter      pictures ore:-releose button is pressed, use the built-in
self-timer. After oll preporotions for toking         l.  Correct composilion of the subiect within
the exposure hove been completed, shift the        the film negotive oreo, ond
MXV-switch (33) until V is oligned with the                                            2. Accurote focusing of the imoge on theindex, ond then press the shutter releqse
button os usuol.                                         fflm plone.
By utilizing the self-timer, it will be possible      ln the BESELER TOPCON AUTO 100 comero
to toke your own photogroph, or hold light-     both these foctors ore token cqre of by o
ing equipment or reflector, or used it   f or      single system, i.e., view-focusing through the
minimizing comero vibrotion on the tripod.       comero lens.
Even when the self-timer is used, Electric-Eye
outomotion tokes ploce ond the correct ex-    coMPoStTtoN:
posure   f or the lighting condition when the     Since the reflected light  f rom the subiect,
shutter is releosed is set to the comero.         which pctsses through the comero lens to lhe
Alwoys return the MXV-switch to  X-setting       film plone for toking the picture, is intercepted
when not in use.                          by the reflex mirror, which is ploced in the
                                                  light poth, ond reflected upwords to  theCABTE REIEASE:                                                         finder's focusing screen :-When using the cqmero on the tripod, etc.,
use <r coble releose screwed into the shutter        l.  Porollox is completely eliminoted, becouse
releose socket, insteod of pressing the shutter         the viewing ond toking lens ore the some,
button, os it will eliminote comero vibrotion.        ond you con compose exoctly os it  will
t7'
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   be loken in the picture, ond                    lens, oll focusing odiustments qre mode direct-
2. The sqme oreq seen in the finder will be       ly on the lens itself by revolving lhe disfonce
                                                                           checking ihe effect    covered in the finol picture.                 focusing ring (tg), ond
                                       on the focusing screen in the finder.
Furlhermore, the eye-level Pentoprism  finder,
which reverses the loterqlly reversed imoge    The focusing screen hos :-
reflected upwords by the reflex mirror, gives                                                                           l. A micro.prism focusing spot.the following odvontqges :-
                                             2. A fine focus ring, oround the spof. l. A right side up loterolly correct imoge,
    moving in the some direction qs the octuol     3. A  full-oreo ground gloss, boosted by
     subiecf, is especiolly voluoble for moving          fresnel lens.
     subiects.                               Micro-Prism Focusing Spof :  The focusing
2. Becouse of the erect loterolly correct     spot in the center is mode up of numerous
    imoge, both eyes cqn be used, one for     microscopic prisms which breok up the imoge
    looking through the finder ond one for
    viewing ihe generol scene.
3.  Eye,-level viewing olso meons correctly
    loferol ond erecf imoges in  verticol
    formqts.

FOGUSING:
Since view-focusing is through the comero             ln Focus         Not in Focus
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when it is nof in focus so thof the imoge is     focusing is not correcl, ihe subiecf will be
seen indistinct ond blurred. When the dis-     seen blurred ond indistinctly, As with the
tonce focusing ring is revolved ond the subiect     focusing spot, revolve either woys of lhe
is occuroiely focused, the imoge in the focus-     optimum focus to check whethei focuslng is
ing spot will be seen distinctly ond shorply.       correct or nof.
Subiects with lineor feotures will be porticu-     Full-Areo Ground Gloss: The full-oreo of
lorly effective for focusing becouse the stroight     the focusinet screen, except for the focusing
lines will look rogged ond broken up when     spol ond fine focus ring, is fine ground gloss
out of {ocus but will be seen stroight when     bqcked by o fresnel plote lens for obtoining
in focus.                                 o brilliontly illuminoted subiect field from edge-
                                             to-edge, without dork corners. ln  otherWhen in doubt, revolve the distonce focusing
ring either woys from whot is considered     words, the whole subiect oreo is olwoys dis-
optimum focusing ond check the effect.              finctly seen ond moy be focused on the full
                                            ground gloss oreo.
Flne Focus Ring:  Around the micro-prism
focusing spot con be seen o cleor ring which     Focusing is done in the some monner qs for
is mode of extro-fine ground gloss only. This     the fine focus ring ond focusing spot.
ring moy olso be used, either singly or    For speedier focusing, use the full focusing
in combinotion with the focusing spot, for      screen, combining oll the focusing meons, i.e.,
focusing of subiects wiihout lineor feqtures.       focusing spot plus fine focus ring plus full
When the distonce ring is revolved ond the     ground gloss, becouse it will olso meon thot
subiect is correclly focused, the finder imoge     composition ond focusing con be undertoken
will be seen distinctly ond shorply, while,  if     of the some time.

 t9
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The distonce ociuolly focused con be checked     ln other words, when q subiect hos been
by reoding the distonce scole (tZ) opposite     focused of o certoin distonce, the lens pre-
the distonce index (l l).                         sents qn opporently shorp imoge not only ot
                                              the focused distonce but olso ot somewhot
DEPTH OF FIELD:                           forther ond neorer distonces. This zone of
When you hove focused on o certqin subiect     opporent shorpness is known os the depth of                                                  field ond fhe rules governing the extent of(plone), it will be seen thqt not only thot
subiect but other subiects, both in froni ond     the deplh of field ore :-
behind the moin inlerest, will olso be seen        l.  The depth of field is grec?er os the dio-
shorply, olthough this will not be true for        phrogm (operture) is closed down, ond
everything before or behind the moin interest.          leost os the diophrogm is opened up.  ln
                                                   other words, the wide-open operture of
                                           the fully outomqtic lens olwoys shows
                                                the leost depfh of field ond is vcrluoble
                                                   for precise focusing.
                                            2. The depth of field is greoter os the
                                              focused distonce increoses ond leost os
                                                  the cqmero-fo-subiect distonce decreoses.
                                            3. The depth of field is greoter behind the
                                              focused subiect (in the bockground) ond
                                                    shollower before the focused subiect (in
                                             the foreground) Uut grows progressively

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equol os the focusing distonce gels     poirs of operlures on both sides of the dis-
     shorler.                                tonce index (t t), which olso represenls the
                                                                                                                                                                              f 12. These identicol poirs4. The depth of field increoses when the     widest operlure of                                            of operlures indicote the distonce thot will  UV TOPCOR 35 mm wide-ongle lens is                                     be in focus qt fhese lens. opening.    oltoched ond decreoses when the UV
   TOPCOR 100 mm telephoto lens is used,        l.   Finding the deplh of field !  For ex-
    bolh in comporison fo the stondord UV         omple, if the lens opening is  f 111 ond
   TOPCOR 53 mm lens.                         ihe distonce focused is l0 meters (os in
The depfh of field of the lens con be utilized         fhe illustrotion), reod the distonces op-
for getting pict'ures with bockgrounds or fore-          posite the operture  flll   (the line be-
grounds ouf of focus, or for getting subiects         fween 8 ond 16) on borh sides of the
in fhe foreground ond bockground shorply, or         depfh of field scole which will show thot
for covering the deepest possible ronge in          fhe depth of field extends from opproxi-
oction shots, etc.                                motely 4.5 meters fo infinity. On the
                                                    other hond, if greofer depth of fteld isDeprh of Fleld Scole: The depth of field                                                      required, see which lens opening willscole (9), on the lens borrel, is ulilized for                                              cover the required field.   lf, for  ex-checking the scope of the depth of field be-                                               omple, the zone should extend from 3couse if shows ol o glonce lhe zone of op-                                                        meters, it will be seen thot ll22  willporent shorpness of qny lens opening or                                              give the required deplh of field which
dislqnce.                                                  will be from obout 3 meters fo  infinity.
The depth of field scole is next to the dis-       Of course, shutter speed will hqve to be
tonce scole (tZ) ond is mode up of identicql         decreqsed lo compensole for the reduc-

2t
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7
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            tion in the effective omount of light.       thon by increosing the focusing distqnce, or
      2.  Zone focusing: When it is required    by using the UV TOPCOR 35 mm lens.
           lo cover two subiecls ot different dis-    Depth of Field Toble:  For greoter oc-
I           tonces from the cqmero, first focus on    curqcy in the depth of  field, becouse lhe
i         the neorest subiect, for exomple, 2    depth of  fteld scole ftgures ore in round
            meters, ond then ihe forther subiect, soy,     sums, use the depth of fteld tobles on poges
        5 meters, both found with the distonce    23 to 30.
           scole. Next, revolve the dislonce focus-                                                         ln oll instoncesr meosure the distonces from
           ing ring until these distonces ore opposife    the focol or film plone (indicoted by the            identicol opertures (opprox. f/16, in this                                                   morking (14) on the comero's fop deck) to           cose) ond use lhis lens opening for the                                                  the moin subiect.
              shot.
                                                 For criticql pin-point shorpnessi olwoys use      3.  Fost zone focuslng: When there is                                           wide operture ond focus on fhe moin plone,
         not enough time for  finding the iwo     becouse everything within fhe depth of  field           limits for  the above zone focusing                                                          is not of equol shorpness bui, on fhe con-
          meihod, focus on o subiect obout fwo-      troryr grows less shorp os it gels forther
              fifths of the woy inlo the required zone    from the plone of focus.          of shorpness ond choose on operture
          which will give sufficient shorpness over
          the whole field.
       lncreose the depth of field, whenever possible,
     by stopping down the lens opening rother

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