Instoscope
Revision as of 06:32, 16 December 2013 by Hanskerensky (talk | contribs) (Added image /anssipuisto/4455840304/ from pool)
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| the extinction meter image by Mario Groleau (Image rights) |
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| Drem Instoscope image by A*J*P (Image rights) |
The Drem Instoscope was an extinction meter in. When viewing thru the ocular one could see a number of letters. The least visible letter was explained on the table which was wrapped around the instrument. The table showed the possible shutter-speed/aperture combinations for the least visible letter.
