Zeiss 35 mm SLR Camera, Руководство по эксплуатации

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Photomicrography with OPERATION
35 mm SLR cameras Blurs/Color balance Carl Zeiss
B 40-046 e 03/99 3-11
3.2.8 Further Notes
3.2.8.1 Avoid Blurs
Mirror and shutter functions of the SLR camera can cause vibration of the photomicrography structure
resulting in blurred micrographs. The image will be dull, the object structures washed out. This is
normally the case with shutter speeds
≤
1/30 s, and the effect becomes more pronounced with
increasing magnifications. The expected exposure time for the exposure to be taken must lie within that
shutter speed range in which blurs no longer occur - in this case
≥
1/15 s. If required, the brightness of
the light in the illumination beam path must be attenuated using color-neutral gray filters.
The following gray and neutral-density filters are available for this purpose:
Filter d = 32 mm d = 25 mm d = 18 mm
gray filter 0.50 (50 % transmission) 467840-0000-000
gray filter 0.12 (12 % transmission) 467841-0000-000
gray filter 0.03 (3 % transmission) 467842-0000-000
neutral-density filters 0.25 (25 %
transmission) 447836-0000-000 467856-0000-000
neutral-density filters 0.06 (6 %
transmission) 447835-0000-000 467855-0000-000
☞
The exposure time for the exposure to be taken can be read off the outside of the camera
housing (display or shutter speed setting knob) or from the viewfinder display. The viewfinder
must be occluded with the eyepiece cover for SLR after the exposure time has been read or
aligned in the viewfinder.
☞
It is recommended to determine the shutter speed range for blur-free exposures of the relevant
camera structure before setting up the instrument (see section 2.5).
3.2.8.2 Color Balance in Color Reversal Films
The color balance of a color reversal film of the same type can differ from batch to batch. Such
deviations can be compensated for by using commercial color-compensating (CC) filters.
The filter density is designated by a two-digit number and the color by its first letter.
Example 5:
05 - B (blue), 10 - G (green), 20 - R (red): correction of the color balance in color reversal films.