BTW, a good way to judge exposure and development is to look at the factory imprints on film borders (for images on negative film - after the image is fully edited and ready for presentation). In correctly exposed and developed frames they look "normal" (not too bright and not too dark; not too saturated or desaturated) . In underexposed they look too bright, and in overexposed - too dark. Of course, that only works when the image is scanned with film borders and the same exact conversion and editing applied to both main image content and borders. With 135 film the sprocket holes can be problematic for many of conversion algorithms unfortunately...