5 OPERATION
EM210F-1
5-21
Binoculars
Focusing knob
Screen lever
Eyepieces
Body tubes
Fig. 5.22
b.
Manipulate the focusing knob of the binoculars to focus the binoculars on
the small screen.
?
First, focus the whole binoculars with the focusing knobs, and adjust, if
necessary, the interocular distance by changing the distance between the body-
tubes, and focus the eyepieces by turning the knurled ring (
F
Fig. 5.18).
c.
Turn on the IMAGE EOB X or Y (R1-
①
).
d.
If the beam oscillates or divides into two, manipulate the Z CONT (R1-
⑪
) to
obtain a single stable beam.
e.
Observe an image with clear contours on the small fluorescent screen
through the binoculars.
f.
If the image appears as a double image, adjust the Z CONT switch (R1-
⑪
)
so as to obtain a single stationary image. The image will appear as a double
image if the image is under-focused or over-focused.
g.
Turn off the IMAGE WOBB X or Y switch (R1-
①
).
10.
Manipulate the BRIGHTNESS knob (L1-
⑥
) to set the exposure time shown
on !Exp. Time” on the center main screen (
F
Sect. 4.4.4b) to an optimum
value.
11.
Depress the PHOTO switch (R1-
⑧
) with the small screen placed in the
electron beam path after the built-in lamp in the PHOTO switch lights up (that
is, the film moves to the photographing position).
?
The EXP lamp opens while the shutter opens. The PHOTO switch built-in lamp
lights up when the exposed film moves into the receiving magazine.
12.
If the built-in lamp in the PHOTO switch is not lit, depress the switch again.
The film is exposed.
?
The lamp will not light up if no film is in the dispensing magazine.
?
The exposure time is determined by an amount of entire electrons either on the
small or large fluorescent screen. Therefore, removing the small screen out of beam
path, when the large screen is entirely illuminated, does not affect the correct
exposure time determination. The small screen therefore should be placed in the
beam path when the large screen is partially illuminated.
