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Operating Instructions—C-30B Camera
USING THE GRAFLOK BACK
Focusing
To focus the camera w ith a Graflok back, perform the
following procedure:
1. Obtain a properly-adjusted trace on the crt.
2. Set the aperture fo r maximum opening (f/1.9) and
set the SPEED selector to T.
3. Press the release button on the bottom-rear side of
the Graflok back to open the folding viewing hood as
shown in Figure 2-9. With the shutter open, observe
the image on the ground glass screen o f the Graflok
back.
NOTE
Either the crt horizontal trace o r the internal
graticule line may be used to adjust focus.
4. Release the FOCUS LOCK knob and adjust the
FOCUS knob to produce a sharply-focused image of
the crt trace (or internal graticule line) on the ground
glass screen.
5. Tighten the FOCUS LOCK knob to ensure that the
focus setting cannot be changed accidentally.
Figure 2-9. View hood attached to the Graflok back.
Installing Loaded Film Holders
Sheet film is available in a variety o f types. Some sheet
film requires prior loading into the film holder in a dark
room, while others permit daylight loading. For loading
conditions refer to the instructions contained with the
particular film being used.
The following procedure can be helpful in installing
most types of loaded film holders into the Graflok back.
Figure 2-10 shows how to install a 4- by 5-inch film holder
into a Graflok back.
1. Slide the top and bottom tab locks out to lift the
locking mechanism away from the focusing panel.
2. L ift the hinged focusing panel on the adapter and
insert the film holder into it.
3. Push the film holder into the Graflok back until it
locks into place.
4. Check that the adapter is flush against the holder on
all four sides.
5. Slide the top and bottom tab locks down to lock the
film holder.
6. To remove the film holder from the adapter, slide the
top and bottom tab locks up to unlock film holder.
L ift the hinged focusing panel away from the camera
slightly, grasp the film holder and lift it slightly, then
pull outward.
Figure 2-10. Installing the 4- by 5-inch cut film holder in the
Graflok back.
2-10
Summary of Contents for C-30B
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