Topcon Waist Level Finder User manual

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}|IGl|MAGNIFICATIONWAIST.LEI/ELFINDER





                                              CO., [TD.                       rcKYoOPTICAL               ,XX"

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TOPCON HIGH MAGNIFICATIONWAIST.IEVELFINDER


The Topcon High Mognificotion Woist Level Finder is qn exclusive reflex type  finder  for  the
Topcon RE Super comero (Beseler Topcon Super D).    lt show, the focusing screen enlorged
6.5 times, ond, when used with o stondord (58mm) lens, provides o mognificotion of  the subiect
of  1.5 times.
Criticol focusing of  the  full screen oreo, from  corner  to  corner,  is possible becouse of o wide
ongle opticol system which consists of  4 elements in 3 groups.   In oddition,  it  is possible  to
moke individuol dioptric odiustments within o ronge  of  -3   Io  *2   diopters.
This Finder wos specificolly creoted  for  use in photomicrogrophy, photomocrogrophy, ond with
telephoto lenses.  In order  to  obtoin obsolutely moximum performonce  the  proper  focusing
screen should be used. (See poge  7).  The Finder con of  course be used for  generol work,
but the imoge  is reversed loterolly.                                                                                                                                                                        ..
With  this Finder in use insteod of  the regulor Pentoprism, the exposure needle  is not  visible
in the finder.    lt  is necessory to use the exposure indicqtor locoted on the top of the comero,
next  to  the finder.   ln oddition,  in order  to prevent wrong  exposure  reodings due  to  ex-
ironeous light enterling through the ftnder, the eyepiece should be covered with  its cop while           :
toking exposure reoding.

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O  Hish  Mosnifi-
    cotion
    Woist Level
    Finder
@  Diopter Adiust-
   ment Ring
@ Rubber   Ey"-
   Crp
@ Stopper  for
   Lorge-Size
   Rubber Eye -
  cup
6) Cop





          Fig.  3

RECOMMENDED ACCESSORIES

            *  fyp"   No.    I  Focuslng  Screen-is    the  stondord  focusing  screen
          which is normolly supplied with the comero.    lt is suitoble for generol
          photogrophy  only.   The  groundgloss oreq  surrounding the  split-
         imoge rongefinder, however, con be used for mocrophotogrophy ond
          telephoto work.                                                                        Fig.  6

           * Typ"  No.  2  Focuslng  Screen-hos   o  full-oreo  groundgloss plus
           fresnel  lens oreo outside q centrol l2mm  diometer spot.    lt  is re-
        commended for  close-up ond telephoto work.

s
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           * Typ"  No.  3  Focuslng  Screen-hos   double cross-hoirs in o centrol
       5mm diometer spot sorrounded by o groundgloss oreo.     lt  is espe-
            ciolly recommended for  use in photomicrogrophy.
            Criticol focusing  is  occomplished by  the  eliminotion  of  porollox
         between the cross-hoirs ond imoge, ofter  first odiusting the eyepiece
            to  the user's eyesight.
                                                        --6-

                                                                  .*,&cro--*,                                                                .*

Type  No.  4  Focusing  Screen--*"is identicol to  Typ.  No.  2  but
with  the odditionol of checkerboord etched lines.   lt  is, therefore,
speciolly recommended for use in close-ups.



Type  No.5   Foeusing Screen-hos   o 5mm diometer microprism
focusing spot, groundgloss ring ond, finolly, groundgloss plus fresnel
lens outside o l2mm diometer oreo.    lt  is suitoble f or generol oll-
oround photogrophy.  However only the groundgloss oreo  con  be
used for  focusing in mocrophotogrophy ond telephoto shooting.
                                                                        F i g .     l 0

Typ"  No.  6  Focusing  5creen*--with  bisecting scoles engroved for
0.5rnrn divisions ond centrql double cross-hoirs on  cleor  screen  is
olso recomr,ended for photomicrogrophy. Focusing is occomplished
 i n  t h e s q m e m o n n e r o s T y p " N o . 3 .

                                                                                    Fig.    I I


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Eyeplece   Gorrecllon    Lens-for    greoter  diopter  corrections  thon possible with  the  eye-
piece  odiustment ring  of  the High Mognificotion Woist-Level Finder, ottoch one  of  the oc-
cessory compensotion lenses.  This will increose the diopter  odjustment ronge  to   -6    to
+5.

Lorge-Slze   Rubber   Eye-Gup-is    ottoched  to  the eyepiece  ring  for  the purpose of ffxing
the distonce between the user's eye ond  the  comerq.      lt  olso  prevents  distrocting  light
from  entering the ftnder, thus moking focusing much eosier ond foster.

Mognlfler-is    ottoched to  the eyepieces ond shows the centrol oreq  of  the field  of view
enlorged  l6 X,   f or even greoter  precision in  criticol focusing.

Angle  Vtew   Flnder-is    ottoched to  the eyepiece ond permits uprighf reflex-fype viewing
of  the field  of  view.





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 Focuslng  Adlustments:
When focusing with Types  1, 2, 4 & 5 focusing screens, use either the center  f ocusing spots
 or  the surrouding groundgloss (especiolly for  telephoto  or smoll lens openings, when the center
 spot becomes dork).  Adiust the eyepiece ring  until the sublect imoge looks distinct ond cleqr.
 It  is much better   if  the subiect is not focused with the distonce focusing ring, of  the comero,
beforehond ond  if   it  is purposely  left  blurred ond  indisfinct.  In  ony  cose, when  the  High
Mognificotion Woist-Level Finder is first ottoched  to  the comero, the eyepiece  ring should be
revolved ond odiustments mode.
With Types 3 ond 6 focusing screens, however, the double cross-hoirs of  the screen will look
blurred ond seem to be single cross-hoirs, if  the vertex power  of  the  eyepiece   is  not  od-
iusted to  the user's eyesight.
Therefore, when the High Mognificotion Woist-Level  Finder  is ottoched  to  the  comero,  the
eyepiece  ring  should be  revolved  either woy  until the cross-hqirs beconie distinct cnd ore
seen cts double cross-hoirs, ot which point the eyepiece  will be odiusted  to  the  user's eye-
sight.
Further focusing shoutd be undertoken with the distonce focusing ring  of  the comero lens, or
microscope focusing knobs,  until  the  subiect is seen distinctly.  When using Types 3 ond 6
focusing screens, however,  it  will olso be possible to focus criticolly  by  eliminoting  porollox
between  the  cross-hoirs ond  imoge.  To eliminote porollox,  shift the eye from  side to  side
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with the cross-hoirs used for focusing ;   if  the cross-hoirs seem to remqin stotionory, while the
     sublect shifts continue focusing ond shifting the eye  until the subiect no longer seem to  shift,
     At thot point porollqx  will be eliminoted ond focusing will be occomplished.

     Exchonging   Flnder  3
     Ploce the TOPCON RE Super (BESELERTOPCON Super D) on o firm surfoce, toke o firm grip
     on the finder  in the comero, depress the finder cotch (between finder snd shutter speed diol)
    qnd slide the finder out towords  the bqck cover  side.
    To insert the finder, slide the front end  in cqrefully from  the bock cover side until   it  clicks
      into position.  No  force  will be required.

*    Mognlficollons    3                                                                    -
    The High Mognificotion Woist-Level Finder shows the subiect 0.65 X  on  the  focusing screen,
    when used with the 25mm wide-ongle lens, 0.9 X  with the 35mm wide-ongle lens; 1.5 X  lorger
*    with the 58mm stondord lens; 2.6X  with the l00mm lens; 3.5X  with the l35mm lens; 5.2X
      with the 2O0mm lens ond 7.8 X  with the 300mm lens; thus increosing occurqcy in focusing, os
    compored to focusing with the Pentoprism of Woist-Level Finder, ond qlso when using telephoto
     lenses, which hove very norrow depths of  field.


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