220 film question

[ben decamp]

I was reading a guide Ken Rockwell produced http://www.kenrockwell.com/tech/format.htm
and he writes that when using 220 film on 6x4.5 format the user gets 32 frames. When using 6x6 the user gets 24. Given that the film feeds horizontally, and the opening on the camera is faced horizontally...shouldn't 6cm+6cm+6cm...etc. equal 24? I may be very confused...

Thanks,
Ben

[marcmccalmont]

I was reading a guide Ken Rockwell produced http://www.kenrockwell.com/tech/format.htm
and he writes that when using 220 film on 6x4.5 format the user gets 32 frames. When using 6x6 the user gets 24. Given that the film feeds horizontally, and the opening on the camera is faced horizontally...shouldn't 6cm+6cm+6cm...etc. equal 24? I may be very confused...

Thanks,
Ben
[a href=\"index.php?act=findpost&pid=145647\"][{POST_SNAPBACK}][/a]

I can't speak for other cameras but my Mamiya 645 AFD feeds film vertically so I would assume most 6*4.5 formats do the same.
Marc

[Wayne Fox]

120/220 film exposes 6cm vertically.  So a 645 format camera usually exposes 16/32 6x4.5 negatives (although some in years gone by could only fit 15/30).  A square format camera exposes 12/24 6x6 negatives, and a 6x7 format camera (such as the RZ67) exposes 10/20 images.  The Fuji 617 captures 4/8 6x17cm images.

[mikeseb]

My Contax 645 also feeds film vertically; the 4.5cm image length is parallel to the length of the film, so I get (120/220) 16/32 images.