Instoscope

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The Drem Instoscope is an extinction meter. When viewing through the ocular one could see a number of letters. The least visible letter is explained on the table which is wrapped around the instrument. The table shows the possible shutter-speed/aperture combinations for the least visible letter.


3134179760_4436e2fbfd.jpg
the extinction meter
image by Mario Groleau (Image rights)
4455840304_2fd7b4ace2.jpg
Drem Instoscope
image by Anssi Puisto (Image rights)


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