Film cameras
Beseler topcon R User manual
User manual for Beseler topcon R. 60 pages in English. Read the original PDF, download or print a copy without registration.
60 pagesEnglish7.0 MB PDF
Loading your manual…Open PDF directly
Document details
- Brand
- Beseler
- Model / document
- Beseler topcon R
- Document type
- User manual
- Language
- English
- Pages
- 60
- File size
- 7.0 MB
- Category
- Film cameras
- Document date
- Not specified in catalog
Search available document text
Find a term, then jump to its page in the original PDF. Image-only pages may not be searchable; check the PDF for exact wording and diagrams.
Page 4 · Read text
www.orphancameras.com 10. Distonce scole 1 5 . S h o u l d e r s t r o p h o o k 20. Rewinding knob with roPid I l. Automotic diophrogm lever 16. Synchro-switchlever rewind cronk 12. Depth of field scole 17. Flosh socket 21. Finder cotch. 13. Aperture/Distonce index 18. Accessory knob 22. Pentoprism finder | 4. Aperture ring 1 9 . F i l m i n d i c o t o r 23. l-ligh speed shutter diolView original page 4
Page 7 · Read text
www.orphancameras.com
YOUR TOPCON R mirror, which being set ot on ongle, reflects the
imoge up to the ground gloss. The mirror is ploced
The TOPCON R comero which you hove iust chosen in o position to intercept the imoge which would
is o single lens reflex comero with o focol plonef otherwise be proiected onto the film plone; there-
shutter ond tokes pictures on q stondord 35mm fore, when the mirror is roised for the shutter
minioture film.
oction, the exoct imoge seen fully on the ground
One of the principol virtue of the single lens reflex
gloss is recorded on the film. The single lens
comero is through-the-lens viewing-focusing. No
system requires no extro occessories for interchonge-
molter whot the focol length of the lenses being
oble lenses ond, therefore, is the ideol medium for
used, or whether used with extension tubes, or
those who constontly chonge lenses ond the TOPCONottoched on the microscope, the finol subiect is
viewed through the lens directly on the ground R hos o full ronge of superior TOPCOR lenses
gloss ond, therefore, the porollox problem simply of vorious focol lengths ond speeds to meet oll
does nol exist. reouirements.
In the mirror reflex principle the imoge of the The combinotion of o TOPCON cqmero ond
subiect is proiected by the comero lens onto the TOPCOR lens is o combinoiion not to be exceeded
4
--rtAR=-View original page 7Page 8 · Read text
www.orphancameras.com
elsewhere. os the TOPCOR brond on the lens is the in with such feotures os (l l speed-lever winding-
ultimote sign of quolity. iust os the TOPCON brond c o c k i n go c t i o n . . . . . . w h i c h s i m u l t o n e o u s loyd v o n c e s
denotes superior quolity. Some of the fostest lenses exposure counler, chorges mirror oclion while pre-
ore ovoiloble for the first time ond they hove not v e n t i n g d o u b l e e x p o s u r e . . . . . . , ( 2 1 s i n g l e o x l e
socrificed f he TOPCOR quolity for more speed; oll h i - l o s h u t t e r d i o l s . . . . . . f o r g r e o t e r e o s e o n d
lenses hove either qutomolic diophrogin or preset speed in setting shutter speeds , (3) shutter
diophrogm oction for speedy oclion, too. Lens releose coupled with outomotic diophrogm ond split-
mounting is o modified boyonet mounting, combining second mirror return . . . . . . no lime lost in dio-
quick-chonge eose with screw-lhreod precision. phrogm ocfion ond mirror block-outs obsolutelv eli-
This combinotion of o single lens reflex system ond minoted , (4) ropid rewind cronk .
superior interchongeoble lenses is rounded out with speedier qction in rewinding for the next filmll
fost hondling eose ond fool-proof operotion in oll looding. For fqsfer focusing speed the two-in-one
ifs mechonism plus o full complement of procticol f ocusing screen hos o split-imoge rongefinder f or
occessories moking this comero suitoble for qll kinds focusing eose even under poor lighting conditions,
of serious photogrophy which coupled with the pentoprism finder is the
Fost hondling eose ond fooFproof operotion is built ideol medium for oction shots. For serious photo-
AView original page 8Page 9 · Read text
www.orphancameras.com
grophic work the bright ground gloss with the infer- progrom to give the IOPCON R user greoler sotis'
chongeoble woist level finder is o hoppy medium' foction with on ever-widening field of utilizofion. .
The full complement of occessories open up new Your TOPCON R hos been tested occording lo fhe
fields of phoiogrophy for the odvonced omoteur strictest stondords bef ore it left our f octory. lt
without froublesome occessory finders ...... oll combines the utmost in precision with unsurpossed
occessories on the TOPCON R do not chonge the performonce ond is bound to give you ulmost sotis-
through-the-lens viewing-focusing for mocrophotogro- foction ond yeors of pride ond pleosure if you toke
phy, phoiomicrogrophy, film copying, photo-repro- core of your TOPCON R.
duction, ond other precision photogrophy. This inslructio.nmonuol hos been compiled to exploin
As con be seen, the TOPCON R is truly o versotile in detoil the operotions of the TOPCON R, os well
olFin-one cctmero combining more proven odvonced os fhe finer poinfs of the comero ond. ot lhe some
feotures thon ony olher single lens reflex comero time, ottempis to give you some elementory picture
on the present morket qnd comes wiih the guorontee toking principles in order thot you moy more fully
lhol more inierchongeoble lenses ond new occessories enioy your TOPCON R picture toking bxperience.
will continue to be onnounced in the future, in o
6
EView original page 9Page 10 · Read text
www.orphancameras.com
SUiIMARY OF TOPCON R distonce index (l3l , releose pressure ond it will
PICTURE.TAKING STEPS click into position.
t . Advonce the film winding speed-lever (l ) by o 4. Push the oulomotic diophrogm lever (lll of the
single I 80o stroke or severol quick sirokes until stondord Auto-Topcor f/t.8 SAmm lens oll the
o full stop is mode. This oction odvonces film woy to open the lens wide for focusing.
ond exposure counter, cocks shutter ond chorges 5. Holding the comero ot eye-level study the
mirror roising oction ond simuhoneously re- ground-gloss imoge ond /or the split-imoge
leoses shutter locking device. rongefinder, independently or simultoneously,F
2 Set
ring {91.i ore theot Ishutter/30 secondsspeed. ondFor exomple,o speed bothof I /500diols focusingwhile focusing by furning the knurled distonce
is being set:- lift the high speed shutter diol 6. When oll is reody, press the shutter releosel l23l ond rotote until the number is opposite button (6). This oction stops down the oper-
the high speed shutter index l24l t let it drop ture to ihe preset opening. roises ihe mirror,
into positon. opens ond closes shulter, returns mirror ond
Set the lens operture. Press the operture ring releoses speed-lever locking device. l 3
lock (81 ond rotote the operture ring (14) until 7 . lf no chonges ore mqde in operlure ond shutter,
' ihe required operture is opposite the operture/ simply repeot steps 1, 4, 5 ond 5.View original page 10Page 11 · Read text
www.orphancameras.com
FILM LOADING LOAD'NG FILM:
The TOPCON R is designed for use with o 35mm 3. Pull up the rewinding knob Q)l os for os it
film in doylight cortridge, or dorkroom looding films will go ond insert the film cortridge into the
pocked in cortridges, ond tokes 20 or 36 exposures empty chomber with the film slit focing the
of 24x 36mm size pictures. Looding or unlooding toke-up spool. Push the rewinding knob bock
of films should not be done in direct sunlight or into ploce ; if the film cortridge shoft slot Q\l
strong ortificiol illuminotion.
does not engoge, turn the knob slightly until it
OPEN'NG CAMERA:
fits into the cortridge.
l. Ploce the comero with the lens borrel down
4. Drow out the film end from the cortridge ond
while holding it with the left hond, or remove
the lens ond ploce comero with lens opening insert os deep os possible into the film toke-up
focing down. For those who prefer, the comero spool slit (321ond, ot the some time, engoge the
moy be ploce on o solid object with the pento- f ilm perf orotion on the screw-heod (30) pro-
prism side topwords, olthough working spoce is truding neor the slit on the lower end of the
slightly cromped
toke-up spool. (:f the slit is not visible turn2. Pull up the bock cover lock (34) on the left
side of the body ond the bock cover will gently the spool by its serroted lower edge (31) until
spring open. the slit oppeors.)View original page 11Page 12 · Read text
www.orphancameras.com
CI.OS'NG CAMERA: NOIE:
5. Moke sure thot the f ilm perforotions f ully
engoge the film tronsport sprocket l29l teeth o. Although"o single 180' stroke on the film wind-
ond then corefully close the comero ond lock ing speed-lever odvonces the film, quick, short
by pushing bock the bock cover lock fully.
strokes on the speed-lever con olso do the iob6. After the film hos been looded, it is best to
moke it o stondord routine to slowly turn the but in this cose the oction must be continued
rewinding knob l2}l in the direction of the until the speed-lever comes to o full stop.
orrow in order to tension the film inside the
cortridge. b. When the thumb is releosed from the speed-
When this is done eoch film winding speed- lever, the speed-lever returns to o position
lever oction will rotote the rewinding knob slightly short of its originol position when in
ogoinst the oction of the orrow engroved on
it, thus indicoting thot the film is odvoncing the leother cose. This pre-stroke thumb gop
properly. is to focilitote the next winding oction.
7. Push the film winding speed-lever {l) with the When closing the leother ever-reody cose the
right thumb os for os it will odvonce ond releose;
the film hos been odvonced one frome ond the speed-lever is eosily pushed bock into its
shutter hos been cocked by this single oction. originol position.
Press the releose button (61. Repeot the obove Keep lens covered with lens cop of, if lens is
operotion once more ond the film will be in
the oppropriote position for beginning the first detoched, cover lens opening with its cover,
exposure. while looding films.
www.butkus.usView original page 12Page 13 · Read text
www.orphancameras.com EXPOSURE COUNTER (2) Next, rotote the exposure counter index (3) by "pushing the two smoll studs until it is opposite 0". The next winding oction will, therefore, bring the first frome into Position. The exposure counter index ; like o clockis hond, rototes clockwise while the numerol diol remoins stotionory, thus the number of exposures is olwoys eosily noted ot o glonce. FILM 'ND'CATOR: Since there ore severol types of films with differ- ent speeds ond exposure will differ occording to the speed of the film looded in the comero, it is procticol to olwoys hove o reminder of the film be- ing used. There is o film indicotor (19) on the re- winding knob f or this purpose, with vorious f ilm speeds in ASA index numbers on the circumference of the outer stotionorY ring. White numbers, 50 to 800, ore for ponchromotic films while yellow number, l0 to 32, ore for color " " " " empty Emp stonds f orfilms ; the obbreviotion when no film is looded. , See the instruction sheet in the film pockoge for the proper film speed (ASA index number) ond set the film indicotor. Fitm sensitivity differs occording to mokers ond vori- ous systems ore used to indicote the film speed. r 0View original page 13
Page 14 · Read text
www.orphancameras.com
: :I,NLOADING FIIM
When you hove finisheC toking your 20th or 35th
e x p o s u r e , d e p e n d i n g o n t h e f i l m t h o t h o s b e e n
l o o d e d , y o u s h o u l d n o t o d v o n c e t h e f i l m o n y m o r e
os th'e film will teor cr pull out of the cortridge.
Even should ycu try to odvonce the film the speed-
lever will not eosily odvonce ond, therefore, pres-
s u r e s h o u l d i m m e d i o t e l y b e r e l e o s e d o n t h e s p e e d -
l e v e r .
REWINDING:
To rewind depress the rewind button l25l in the
bose of the comero ond turn counter-clockwise until
it stops ; releose pressure os it will be locked.
Unfold the ropid rewind cronk from its folded position
on the rewinding knob ond turn in' the direction of
the orrow. Rewind ropidly until there is no longer
ony resistonce, which will be on indicqtion of the
f i l m b e i n g c o m p l e t e l y r e w o u n d , o n d s t c p .
UNI,OADING:
NOIE 3Open the,bock . cover, os noted in the porogroph
"Opening Comero", pull up the rewinding knob It is o good proctice to moke it o stondord routineon
of releosing the turn-locked rewind buttcn by turn-fully ond lift out the film cortridge corefully. After
ing it clockwise ; however, even should this oction
removing the exposed film, reploce it in its origindl be eliminoted there is nothing to feor os the speed-
pocking for full protection until you hove the film lever oction will outomoticolly unlock the rewind
developed. button without ony trouble.
l lView original page 14Page 15 · Read text
www.orphancameras.com
REFTEXVIEWING The chief virtues of the pentoprism finder ore:-
l. A right side up loterolly correcl imoge ; porti-
One of the principol odvontoge of the TOPCON R culorly voluoble for moving subiects.
syslem of phoiogrophy is the single lens reflex 2. An eye-level f ocusing ond viewing systemI
viewing-focusing system. No motter which f inder especiolly suited for verticol piclures.
is used, the subiect is viewed directly through the 3. Both eyes con be used wide open, one for
lens ond. therefore, the porollox problem (so com- the finder ond one for the subiect ; porticulor-
mon with comeros hoving different locotions for the ly voluoble when ponning shots.
finder window ond comero lens) is entirely elimi- 4. Brillioni, life-size imoge, voluoble when keeping
noted. one eye on the subiect.
PENIAPR'SM F'NDER; EXCHANG'NG FINDERS:
In ihe mirror reflex system of the TOPCON R the The penloprism finder is exchongeoble wifh o
imoge of the subiect is proiected onfo lhe mirror woist-level finder (similior in use fo the reflex hood
upside down ond reversed from left to right, due of the lwin-lens reflex comerol.
to lhe oction of lhe lens. When this is reflected To chonge finders, toke o firm grip on lhe finder in
up lo the ground gloss, ond seen through the con- the comero, depress the finder cotch (2ll ond lift
denser lens, the imoge is seen right side up but the finder out by gliding it out towords the bock
slill reversed loterolly.
cover.
The pentoprism finder 1221l, o five-sided prism, which To insert o finder, slide it in corefully from the
is supplied with the comero, tokes this imoge ond
bock cover side until it snops into position. Noshows on imoge in the eye-piece which is both
force is required.right side up ond loterolly correct. while, ot the
some time, enlorging the imoge to life-size when NOTE:
viewed through the stondord Auto-Topcor f'58mm The front side of both the pentoprism finder ond
le ns. woist-level finder is distinguished by the compony
1 2 "View original page 15Page 16 · Read text
www.orphancameras.com
trode mork, olthough it is obsolutely impossible to Reflex Hood : Press the releose button of the
insert it bockwords becouse of the constructions. reor of the finder ond the cover will instontty
spring open, exposing the ground gloss on whichW AIST-LEVEL FINDER :
the imoge is viewed os o brilliont ond enlorged
As noted olreody, the imoge proiected onto the subiect equivolent to the finol picture size.
ground gloss is right side up but reversed from left To close the hood, push down the cover until
to right ; when viewed through the woist-level it snops into ploce.
finder, which is supplied os on occessory, this is Mognifier: For greoter mognificotion, when
the imoge seen to the eye. Since the imoge is not more criticol focusing is required, such os for
close-up work, the pull up reor end of the
loterolly correct, this f inder is not suitoble f or mognifier cover which will instontly snop open.
oction shots wherein the subiect is constontly mov- A port greoter of the imoge seen in the ground
i n g . gloss is enlorged 8X by the mognifier. To close.
However, it is suitoble for viewing owoy from the reverse ihe obove action.
eye, such os f or overheod shots or low ongle
shots, etc., which ore impossible with the pento-
prism finder.
Bui, the moin odvontoge of the woist-level finder is
found in the foct thot it is suited for studying the
subiect for int'erest ond composition, ond especiotly
voluoble for criticol focusing (with the use of the
built-in mognifier) in close ronge work.
The TOPCON R woist-level finder is o four-sided
hood with o spring,,openingcover in which is in-
corporoted o mognifier with its cover.View original page 16Page 17 · Read text
www.orphancameras.com
FOCUS'NG SYSIEM:
The viewing system of the TOPCON R is olso lhe
focusing system of the comero. Focusing is occom- PRINCIPTEOF THE SPTITIMAGE
plished by two methods in rhe TOPCON R, one by RANGE FINDER
meons of lhe ground gloss ond lhe other by using
the split-imoge rongefinder, in the center of the
ground gloss.
q. Ground gloss : The condenser gives o greotly
enlorged ond brilliont imoge on lhe ground
gloss which is eosily focused, with the wide
open diophrogm of the Auto-Topcor or R.Topcor
lenses, by observing lhe shorpness of lhe imoge
on the ground gloss. The mognifier will greot-
ly help the uninitioted into the ground gloss
focusing method.
When in doubt, focus until the imoge oppeors
shorp ond then focus in either directions lo
compore shorPness.
b. Split-imoge Rongefinder : The rongefinder ele-
ment is in the center of the ground gloss ond
consisls of lwo semi-circulor wedge-shoped Out of focus In shorpfocus
prisms which split the imoge. When out of
focus, the two portions of the imoge ore sepo-
roted loterolly: when the lwo seporoted por-
1 4View original page 17Page 18 · Read text
www.orphancameras.com
lions ore brought into line, the imoge is in
shorp focus.
The moin odvontoge of the split-imoge ronge- Pento Prismri finder is clorificotion of imoge, eosy focusing
under difficult conditions ond o meons for ob-
Eye-piece
toining lhe correct disionce prior to snop-shool-
ing. However, focusing must be corried out ot
o recscnobly wide operture ond is not procti- l col ot o smoller operture thon f /5.6; olthough
it is much eosier to focus under difficult light- Condenser
ing condition thon the ground gloss becouse of Split-imoge
Rongefinder
the effect of the condenser, which brightens
the imoge in the rongefinder very much. Ground gloss
Combined Focusing
Since fhe TOPCON R hos o combined focusing
system, ond becouse the split-imoge rongefinder
only shows o smoll porlion of the imoge. the
ground gloss con be used to focus on the full
picture simultoneouslywith the rongefinder, or
independently, to be checked loter ogoinst the
rongefinder, if required. -____J Film plone
The split-imoge rongefinder gives speedy results
Comero lens Mirror
while the ground gloss is s uited for siudied
composition ond for depth-of-field control.View original page 18Page 19 · Read text
www.orphancameras.com
t E N S NOTE:
In the R.Topcor interchongeoble lenses, which ore
The stondord lens of the TOPCON R is on inter-
equipped with preset diophrogm insteod of the
chongeoble Aulo-Topcor 6 elemenl Gouss type lens
outomotic diophrogm f ound on oll Auto-Topcorwith o moximumspeed f/1.8 ond focol length 58mm
ond hos o built-in outomotic diophrogm to focilitote lenses. the knurled distonce focusing ring is posi-
focusing under oll conditions. For eosier reoding tioned in the middle of the lens borrel ond the
under oll conditions the lens borrel is o block en' index mork for ihe distonce scole is olso o red-line
omel bockground with white or yellow numerols in index mork on the depth of field scole.
striking conlrost.
FOCUSING THE [ENS -
Since the lens is the viewing-focusing sys?em of the
single lens reflex comero, oll focusing odiustments
ore mode directly on the lens. To obloin shorp-
ness in the imoge on the ground gloss screen or
in the split-imoge rongefiinder, the knurled distonce
focusing ring (9), is turned either woys until the
imoge becomes shorp. The lens to subiect distonce
will then be reod off on the distonce scole (l 0)
immediotely behind lhe focusing ring, ogoinst the
single red-line index mork (l 3l which is on the
depth of field scole, ond which is olso used for
?he operture index mork. The white numerols ore
distonces in meier while yellow figures ore some
Auto-Topcorf/t.8 S8 mmin feet ; focusing is from infinity to 1.6 ft. (0.5
meterl. ffi
1 6
J-!r,reView original page 19Page 20 · Read text
www.orphancameras.com
I.ENS OPENING: The lens opening of the Auto-Topcor lens is odiust-
ed by pressing the operture ring lock (8) ond rotot-
The light imoge thot enters the lens is controlled ing the operture ring either woy until the required
by the diophrogm to produce o groduoted series operture is opposite the red-line index mork, ot
of lens opening colled opertures or stops. In the which point pressure is releoseC on the operture
Auto-Topcor stondord lens, the following opertures, ring lock.
with the exposure rotios noted, ore ovoifoble on
the operture ring (14) ot the reor end of the lens
ond ore reod off ogoinst the red-line index mork on
the depth of field scole next to it.
A p e r t u r e t . 8 l 2 l 2 . 8 4 5 . 6 8 1 l ( l 6 1 2 2
E x p o s u r e R o r i o 1I /1541 1 2 1 2 4 8 l S 3 0
From the obove it will be noted thot eoch smoller
operture requires double the exposure of the pre-
vious operture ond thot, therefore, siopping down
will require o corresponding increose in the shutter
time if light conditions remoin unchonged.
For exomple, if the shutter speed ot f 18 is 1 I 60
s e c o n d s , i t w i l l b e I / 3 0 s e c o n d s f o r t l t t , o n d t h e
other woy oround.
Selection of operture is entirely dependent on the
required correct exposure for o pre-determinedshutter
speed ond for q required depth of fiefd.View original page 20Page 21 · Read text
www.orphancameras.com
PRESETAND AUTOMATIC DIAPHRAGM: o. Aulomqtic Dio Phro gmr[r All Auto-Topcor lenses hove the outomotic dio-
Since the lens of the TOPCON R is the viewing- phrogm with o built-in releose to unlock the
focusing system of the comero ond, of the some outomotic oction. The desired operture is set
time, the operture controls the omount of light poss- os described obove, next, cock the outomotic
ing through to the film, these two foctors moy ot diophrogm lever (l I ) oll the woy, which will
times work ogoinst eoch other becouse (l ) viewing- set the spring mechonism ond open the lens to
f ocusing should be undertoken ot the moximum its moximumoperture. When the extended shut-
operture while (2) the subiect moy require o stop- ter releose (6o) is pressed, the outomotic dio-
phrogm mechonism is octuoted ond the lens
ped down operture.
closes down to the pre-determined opertrJre,
Before the odvent of the modern single lens dio-
phrogm mechonism both octions could only be oc-
complished by (l) focusing ot the widest operture
ond then l2l monuolly stopping down to the requir-
ed operture which, I ot. times, meont vlewing ogoin
with o possible loss of o good picture toking op-
portunity.
The stondord Auto-Topcor lens ond oll interchonge-
oble Auto-Topcor or R. Topcor lenses hove either
on (l ) outomotic diophrogm mechonism or o (2) pre-
set diophrogm mechonism.
www.butkus.us
l 8View original page 21Page 22 · Read text
www.orphancameras.com
while ot the some time the body shutter re- Presel Dio phrogm
leose (6b) is olso releosed ond the focol plone All R-Topcor lenses hove the preset diophrogm
shutter ond split-second mirror mechonism ore mechonism, consisting of the operture index
octivoted. mork (A) (o white diomond), operture scole
N O T E : ring (B) ond knurled preset diophrogm ring (C),
l. The outomotic diophrogm lever moy be cocked in thot order from the front end of the lens
bef ore setting the required operture without borrel. The operture scole ring ond knurled
ony difference in the result. The first oction preset diophrogm ring ore moved interlocked
will open the operture to its moximum opening, or the totter is moved independently.
octuote the spring mechonism,but the operlure- The desired operture is set os described obove.
' ring oction will not close down the operture. This oction does not stop down the operture but
Only the extended shutter reteose or the outo-
motic diophrogm releose will stop down the
operture
2. In order to focus the next frome ot wide oper-
ture the outomotic diophrogm lever must be cock-
ed ogoin : if no chonge is required in operture
it is not necessory to touch' the operture ring.
3. lf, ofter cocking the outomotic diophrogm lever,
o chonge is required in the operture, the de-
sired chonge 1no,ysimply be mode by re-setting
the operture ring.View original page 22Page 23 · Read text
www.orphancameras.com
only sels up lhe preset diophrogm mechonism; f 18.
the operture, ot lhis stoge. is the operture oppo- 2. lf for ony reoson, ofter completing fhe obove
site lhe operture index mork. In octuol proc- steps, it is desired to chonge ihe operture to
tice this is usuolly sel ot the moximumoperture 1,4, it will be necessory fo rotole both rings
, , for moximum eose in focusing: bock to the moximum operture ond stort oll
-, After viewing-focusing is completed, the knurled - over ogoin or the rings con be moved until
mork index operture lined with the is up fi4 inlerlocked ring is moved diophrogm,^ . pr"t"t preset re-odiusted mork con be which the ofter operture ring, simply scole by not with lhe
' pressing bock the former, ond fhe diophrogm to olign with f 14.
j is qutomoiicolly stopped down to the pre-deter- NOTE:
' mined operture. Then, press the body shutler l. The knurled preset diophrogrn ring's presel mork, '
releose. either interlocked or independently, will not
EXAMPLE: . move to the left of the operture index mork
L Consider thot the operlure tlZ.8 is lined up (looking towords the comerol, ond the moximum
with both the operture index mork ond the operture will not move to the right of the
preset mork. lf the desired operture for pic-
operture index mork.
ture toking is f/8, push bock the knurled preset
diophrogm ring (releosing the interlocking oction [ENS MOUNI:
with lhe operture scole ring) ond set the preset The lens mount of the TOPCON R is o convenient
mork opposite the operture f/8. boyonei type lens mount, similior lo thot on the
When focusing is completed, turn the knurled Exokto ond Exo. Removol or ctlochment of the vo-
preset diophrogm ring interlocked with the oper- rious Auto-Topcor or R. Topcor lenses is simple,
fure scole ring until it stops outomoticolly ot quick ond without trouble.
20View original page 23Page 24 · Read text
www.orphancameras.com
o. Removol of Lens:
To remove the lens, simply press the lens lock-
ing lever 1271, to disengoge the lens locking
pin on the lens borrel, ond rotote the lens o
quorter turn counter-clockwise, of which point
t h e ' r e d d o t s , o n e o n t h e l e n s b o r r e l o n d t h e
other on the comero body (both ot the twelve
o'clock position) will correspond.
Simply lift out the lens os the slots on the
reor end of the lens borrel hove iust disen-
goged the corresponding slots on the body
flonge.
b. Atfqchment of Lens :
To ottoch the lens, line up the red dot on the
reor end of the lens borrel with thot on the
body ond insert it with core. When it is well DEPTH OF FIETD
seoted give the lens o quorter turn clockwise
When o subiect hos been properly focused on ot u n t i l i t c l i c k s i n t o p o s i t i o n .
o set distonce, not only the subject but port of
I.ENS COVERS : the foreground ond bockground,ond obiects therein,
All interchongeoble lenses not being used should olso hove occeptoble shorpness. This oreo of oc-
be covered ot both the front ond reor ends with ceptoble shorpness is colled the depth of field ond
their respective covers ond ploced in their leother the principles governing it oro :-
coses. l . T h e d e p t h o f f i e l d i s g r e o t e r . o s t h e d i s t o n c eView original page 24Page 26 · Read text
www.orphancameras.com
ture, it will be possible to reod off the dis-
tonces opposite the figures I 1 on both sides
of the depth of field scole which will be op-
p r o x i m o t e l y l 0 f e e t t o 3 3 f e e t o r s o , t h i s b e -
ing the depth of field in this cose. lf the oc-
ceptoble zone of shorpness is insufficient the
operture moy be stopped down to tlZZ which
will give you o depth of field of opproximotely
8 ft. to € , showing thot stopping down in-
creoses the depth of field. On the other hond,
s t o p p i n g d o w n o l s o m e o n s t h o t t h e s h u t t e r
speed niust be decreosed to compensote for the
reduction in the effective omount of light.
b. How fo zone focus
An olternotive ond more procticol method of
finding o suitoble operture for o required zone
of shorpness is to focus on the opposite ex-
tremes i.n the zone, i.e. the desired neor ond
for limits of the subiect, ond setting these dis-
tqnces opposite identicol operture numbers. By
t h i s m e t h o d i t i s p o s s i b l e t o h o v e i n s t o n t z o n e
f o c u s i n g ' o f i d e o l s u b i e c t s w h e n t h e r e i s n o t
e n o u g h t i m e o r w h e r e t h e s u b i e c t i s m o v i n g
too fost for occurote focusing
For exomple,. your subiects moy be between
8 f t . t o 1 4 f t . ( t h e s e d i s t o n c e s c o n b e f o u n dView original page 26From the M. Butkus archive. Original publisher and archive notices are retained.
Check the model and edition against your equipment.
PDF verified 2026-10-10.