hey-- I got one of them adapt a rolls---turns out you only need to use the 620 spool for the take up--you can put a regular 120 roll in the and pull the film off of it---ony "problem' is I had to add a couple of plastic washers to provide friction to provide enough feed tension..but it works perfectly---BUT for each roll of 120 you want to shoot, you need an empty 120 spool....
That final sentence doesn't make sense, why would you when the film comes on a 120 spool. If you meant 620 spool, you only need one and keep reusing it. If you are planing to shoot several rolls before getting back in the darkroom, then I can understand needing extra 620 spools.
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You can buy it either respooled or with trimmed 120 spools. I just found this out as my fiance bought me an old Kodak Duaflex for Christmas. One place on eBay is selling film they've trimmed the flanges on (I suppose, they fit anyway) and B&H sells re-spooled film. Search eBay and the B&H website. The B&H film is on plastic spools that people report are difficult to use for re-spooling.
All this film is about $10-$12 a roll for black and white, quite a premium compared to respooling your own, but you can buy it ready to go.
Hmm I think johnielvis meant you need a 620 spool for take-up for each 120 you shoot on an outing.
And that's another factor. I hung out on ePrey looking at 620 spools and typically with shipping they were averaging out to more than $6 each. This was in 2010 and I assume they won't be getting cheaper as time marches on. Fortunately the only 620 beastie in my collection is my Brown Target Six-20 which I don't plan to do major projects with. Respooling is a bit of a pain, but being retired, it beats paying 10 bucks or more a roll. It also offers more emulsion selection that what I've seen available prepackaged.
Yeahbut, $6 a spool isn't so bad when you can re-use them.
I don't expect to use this little Duaflex a lot as I'm just not a "cheap lens box camera" type and I have a Yashicamat. But I'll use it some for fun. But having a workable way to use 120 film without tedious re-spooling could make unconverted old Medalists really appealing.
I'm pretty sure that Kodak introduced 620 to insure that Kodak cameras were fed with Kodak film. The tighter roll does cause some flatness/loading issues. Why couldn't they make an Adapt-A-Roll in 120?
My Adapt-a-roll happily takes 120 film as long as you have a 620 take-up reel. Makes life easy.
I had to look up Adapt-A-Roll. Now that I know what it is, I don't get the point. It's a roll film holder for a spring back. I have one (Calumet C2) - why get one made for 620 when you can just get one made for 120? Or are there spring back cameras (like the 2x3 Graflex you mention) that the Adapt-A-Roll will fit and a Calumet 120 holder won't?
Could it be lack of demand for 620 film. This film format was seen by Kodak and other film manufacturers as an amaleur format. Cameras which took this film were usually simple point and shoot models. Most of them finally found their way to the landfill.
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