burkphoto wrote:
Do a clip test if you can, to judge emulsion speed (it decreases with age). Color may shift some, too.
I do a clip test with a 21-step Tiffen gray scale and an X-Rite Color Checker chart placed under controlled lighting.
Meter a gray card. Expose at base ISO and at 1/3 stop intervals for two stops slower. (Say ISO is 200. Test at 200, 160, 125, 100, 80, 64, and 50.) Fire off three blank frames after the test.
In a darkroom or dark bag, open the camera back (do not rewind!). Cut film across the shutter and attach it with a two inch piece of tape to a new spool from a new snap cap 135 cassette. Remove the remaining film cassette from the camera.
Slide the film and spool in the camera through the felt lips of the cassette shell, and snap on the lid. Put that cassette in the camera, close the back, and rewind the film.
Cut a new leader in the film left over.
Develop the clip test. If you use a lab, label the cassette with film name, process (C41, E6, or B&W), and “CLIP TEST”.
Pick the best frame, and set the camera meter to that ISO for that film...
Do a clip test if you can, to judge emulsion speed... (
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That’s really cool, never heard of that. Thanks for the explanation