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Photomicrography with
OPERATION
35 mm SLR cameras
Exposure functions
Carl Zeiss
B 40-046 e 03/99
3-9
Therefore, only the following exposure modes are possible:
−
Automatic exposure control with open aperture (automatic control with preselected aperture);
depending on the image brightness, the camera automatically selects the shutter speed for the open
aperture, i.e. aperture 1.2 or 1.4
−
Exposure after manual exposure time alignment with preselected open aperture;
depending on the image brightness, the shutter speed is matched for the open aperture, i.e. aperture
1.2 or 1.4, by turning the shutter speed knob until zero alignment of an indicator (e.g. pointer on
indicator).
−
Exposure after manually set exposure time and B function.
The measuring range of cameras with T2 adapter is determined by the ranges of exposure values (EV),
shutter speeds, film sensititvity and by the open aperture 1.2 or 1.4.
Fig. 3-3
Measuring range of 35 mm SLR camera with T2-Adapter, ISO 100 / 21°