New answers tagged film-scanner
FWIW, there is wider sleeving that will hold four strips of 3 6x7s, such as this sleeving material. If the scanner only detects the first two frames, then after you've scanned the first two frames, maybe you can insert the film upside-down to get the scanner to detect the last frame, then rotate that scan afterward.
Wasting a sleeve is the right way to go unfortunately. If you're extremely careful yes they will barely fit in as 3s, but I've found that they'll slip out one edge and damage your film if you breath wrong. Definitely do not go with an internegative (rephotographing your negatives) process, I'm not sure where that came from.
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