Zeiss 35 mm SLR Camera Operating Manual

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Zeiss 35 mm SLR Camera Operating Manual Manual pdf 40 page image

OPERATION Photomicrography withCarl Zeiss Exposure functions 35 mm SLR cameras3-10 B 40-046 e 03/99Example 4:The longest shutter speed measured with cameras with T2 adapter (Fig. 3-3) for ISO 100/21° and theopen aperture 1.4 is T max = 2s, and the shortest shutter speed T min = 1/4000 s.The shortest shutter speed T min of 1/4000 s is measured with film speeds ranging from ISO 25 / 15° to ISO3200 /36°; the longest shutter speed of 16s is only measured at ISO 12 / 12°; the longest shutter speedwith ISO 3200 / 36° is only 1/15s.According to section 3.2.8.1, no blurring occurs with shutter speeds ≥ 1/15s.Therefore, the working ranges for cameras with T2 adapter (Fig. 3-3) are as follows:− shutter speeds 1/15 s...16 s for ISO 12/12°,− shutter speeds 1/15 s...2 s for ISO 100/21°,− shutter speed 1/15 s for ISO 3200/36°.+ Any kind of stray light entering the viewfinder of the camera falsifies the measuring result ofthe exposure time to be controlled. Therefore, you should work in a darkened room and, afterreading or aligning the exposure time in the viewfinder, you should always cover the viewfinderwith the eyepiece cover for SLR before the automatic exposure is triggered.+ For the setting of the various measuring techniques and exposure modes, and for the display ofexposure times, please see the operating manual of the used 35 mm SLR camera.3.2.7 Trigger the ExposureTriggering the exposure by pressing the release button of the SLR camera with your index finger exertslateral pressure on the camera structure. This can result in blurred micrographs.Therefore, the exposure should always be triggered with the cable release attached to the SLR camera.There should be no strain between the cable release and the SLR camera.If available, the selftimer function of the SLR camera can also be used to trigger the exposure. Thevibration of the camera structure caused by the short pressing of the release button is no longer effectiveuntil the exposure is triggered after the exposure delay (usually 8 ... 10 s).