I just tested a lens (Nikkor-W 300mm f/5.6) with a Calumet Shutter Tester; What is the math I need to do in order to figure out by how accurate each shutter speed is?
These are some to the numbers I've gotten.
Shutter Speed Test No.
1/60 .2347
1/30 .4031
1/15 .7209
1/8 .13349
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