I’m not exactly sure how it works, but something does actually shift during transport so that the step length becomes shorter.
So, I dug out my Flexaret automatic and:
Nothing needs to be adjusted there – thanks to its ingenious design.
The frame advance is determined by a roller (located between the take-up spool and the viewfinder), which has small rubber rings for this purpose.
It’s thicker on the outside (for 6x6), with a 35mm-wide, thinner section in the middle to which another set of rubber rings is attached.
This means that with 36mm film, the roller rotates just as often as it does with 6cm roll film.
I don’t have the adapter; in my opinion, it’s a bit overpriced, but as far as I recall, it consists only of a mask for the image field, a holder for the cassette and a take-up spool.
So
there shouldn’t really be anything to stop using 220 film – the film advance is always set correctly by the film width, and the frame counter can probably be tricked.
The only question is whether the film pressure plate is suitable for this; it can’t be adjusted like on other cameras.
Regards
Christian