Difference between revisions of "Instoscope"
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Revision as of 10:31, 6 October 2012
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| the extinction meter image by Mario Groleau (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.
