Zeiss 35 mm SLR Camera, Руководство по эксплуатации

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Photomicrography with OPERATION
35 mm SLR cameras Use of digital cameras Carl Zeiss
B 40-046 e 03/99 3-15
3.3 Using Digital Cameras
Some digital cameras have the same or a similar housing as standard 35 mm SLR cameras. The film gate
of these cameras contains an area sensor or a scan sensor array instead of the film, and the T2 adapters
suitable for the relevant camera can be attached to the objective mount.
These digital cameras can therefore be attached to microscopes from Carl Zeiss, as described in sections
2.3.1 through 2.3.5. However, the following must be taken into consideration:
−
Cameras with scan sensor array, e.g. Praktica Color Scan, Leica S1.
During the exposure, a RGB sensor array, which is approx. 36 mm long, scans the image line by line
by moving beyond the 24 mm image height.
The content of the scanned image is approximately identical to that on 35 mm film.
The time for the exposure (scanning time for one image) depends on the image brightness and the
required resolution, e.g. 180 - 2400 s for full resolution. The motion of the sensor array can cause
vibrations resulting in blurred photos.
−
Cameras with area sensor, e.g. Kodak EOS DCS 1 (Canon EOS 1 camera housing),
Kodak DCS 460 (Nikon N90s camera housing)
The outer dimensions of the sensor chip, i.e. 18.4 mm x 27.6 mm, determine the image contents of
the digital photo. Here, the image contents totals approx. ¾ of the photo on 35 mm film.
Exposure is made via the shutter of the camera.
In the case of short exposure times, the shutter and mirror slap can cause blurred images (see section
3.2.8.1). The Kodak EOS DCS 1 permits the effect of mirror slap being eliminated by mirror pre-lock.
−
The camera models Kodak EOS DCS 3, Kodak EOS DCS 5 and Kodak DCS 420 have integrated area
sensors of smaller dimensions.
If the outer dimensions of the sensor chip are 16.4 mm
×
20.5 mm, the image contents of the digital
photo totals approx. 2/3 of a photo on 35 mm film.
If the outer dimensions of the sensor chip are 9.3 mm
×
14 mm, the image contents of the digital
photo totals approx. 2/5 of a photo on 35 mm film.
Further information on the use of digital cameras is available from your local Carl Zeiss agency or from
the following Internet address:
micro@zeiss.de
www.zeiss.de/micro