UNICUM Shutter User manual

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     Instru ctions
            for Operating tlte

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                                go., Rochcstcr (,amera g tuPply
       Rocbestm, N. Y.

Digitally signed by Mike Butkus
                                                                                            DN: cn=Mike Butkus, o,
                                                                                                       ou=Butkus.org,                      Mike Butkus email=mike@butkus.org, c=US
                                                                                                            Date: 2024.10.12 17:59:40 -04'00'
         Instructions.

    The tlial at the *oo'"r'.orrter marked No. I
rnay be turned either to the right or left to any
Cesired position by use of the milled edge with
thumb and finger, and will he found to work
harder rnoving from B to T than elsewhere.
    Automatic exposures are made when the
dial is at I, 2,5, 25 or 100 ; the figure 1 meaning
one second; 2, one-half second ; 5, one-fifth sec-
ond  ; 25, one twenty-fifth and 100, one one-hun-
dredth part of a second. Should an exposure
of one-half second be wanted. turn the dial until
the figure 2 is at the top of the shutter on a line
with lever 2, as in the illustlation. After turn-
ing the dial to the required speed, turn lever 2
to the left as far as it will go, which sets the
sltutter. The exposure can be made either with
thc' pneumatic release by pressing bulb once, or

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    by hand, b5r pressing lever B down, when the
      shutter will open and close with one operation.
         Should a time exposure be desired, turn the
       dial until letter T is ar the top in line with Iever
       2, setting the shutter as before, when one pres-
      sure on lever 3 or bulb will open tlre slrutter.
    When sufficient time has been given the second
      pressure closes it.  Should a bulb exposure be
      desired, place letter B on the dial at the top,
     when one pressure of lever B or bulb will open
      shutter, when pressure is released it will close.
       The figures at the bottom of the shutter
q   indicate256 beingthethesizesmallestof the diaphragmand No. 8opening;the largest.No.
       'I'he diaphragm opening can be readily changed
    by moving lever b either to the right or left  ;
     the smaller openings being preferable for time
     exposures, the larger for instant&neous.
       As all lenses need wiping occasionally to
     remove dust, etc., they can be readily unscrewed
    from the shutter for this purpose, being very
      particular to get each in its same position wben
      replacing.
       f)o not use oil on the shutter.