What 220 cameras are there?

richardhkirkando said:
Unfortunately, most labs seem to charge double their 120 rates for 220 processing. I'm not really sure why that is...I guess it exhausts their chemicals a little more quickly, but it can't be that significant, and there shouldn't be any additional work involved.
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I can completely understand why a lab would charge double for a roll of 220 since it's twice the length of 120.

What I don't understand, however, is why my lab charges MORE than double for 220. I asked them about it and they just shrugged their shoulders.
 
Dwig said:
220 has twice the area as 120 and consumes twice the chemistry. A roll of 120 has about the same square inch area, and thus same chemical consumption, as a 36x roll of 35mm. 220 is twice that.
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Right, which is why I said that it exhausts their chemicals more quickly.

It really depends on how much (and if) they reuse it, though. If you don't reuse it, it shouldn't matter - if I'm developing medium format, I know I need about 600 mL of developer, regardless of whether its 120 or 220. Pro labs obviously use equipment with higher capacity than my Patterson tank at home, but its the same general idea.

That said, I have no idea what kind of equipment pro labs use. The place I go to does all of their orders at noon on Tuesdays and Thursdays, so I've always assumed they have some kind of ginormous tank and do it all at once.
 
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