39
Fig. 56
Fig. 57
Fig. 58
3
Attaching the Photomicrographic system
(Fig. 56)
· Attach the photomicrographic system directly onto the photomicrographic
system mount on the straight photo tube.
Align indices
1
on the straight photo tube and photomicrographic system
and clamp.
The photomicrographic system can also be mounted on the side port in
the same way as above.
4
Switching to the Photomicrography Light Path
See the description in “Observation Tube” on page 19.
5
Adjusting the Focus
(Figs. 57 & 58)
}Focus adjustment for photomicrography is performed by attaching opti-
mum finder eyepieces for each film size onto the binocular section of a
trinocular observation tube or through the viewfinder of the photomicro-
graphic system.
If the photomicrographic system is attached on the side port, focusing is
impossible because the parfocality with the finder eyepieces is not ad-
justed. In this case, adjust focusing directly through the viewfinder of the
photomicrographic system. If the viewfinder is hard to view, it is recom-
mended to use the optional U-FTV V-shaped focusing telescope @.
# Note that finder eyepieces cannot be attached to the U-BI90CT and
U-BI90 binocular observation tubes.
}The finder eyepieces show four photo masks. The numbers given to the
masks correspond to the magnifications of the photo eyepiece. (Fig. 57)
1. Adjust the diopter of the eyepieces and focus on the photo masks in
advance. Focus so that the double crosslines are sharply visible as two
distinct lines. (Fig. 57)
2. Bring the specimen into focus using the focus adjustment knob. As the
reticles of photo masks and the film plane are optically in precise align-
ment, adjust focusing so that both the double crosslines and specimen
are sharply visible.
}Because of the great depths of focus of 4X objectives, use an optional
U-FT focusing telescope for accurate focusing using these low-power
objectives.
}If the viewfinder of the photomicrographic system mounted on the side port
is hard to view, it is recommended to use the optional U-FTV V-shaped
focusing telescope. (Fig. 58)
Using the U-FTV
· Rotate the diopter correction ring of the viewfinder to the +2 index position.
· Slide the top portion of the U-FTV
1
up or down until the photo masks
are brought into focus. (Fig. 58)
<<
Photographic Magnification
>>
· 35 mm photo magnification = Objective magnification x PE photo eye-
piece x Magnification change value
· Large format camera back magnification = 35 mm photo magnification x 3
1
1
