Why not just shoot 4X5 & mask off what is not needed? You would have to shoot a lot of roll film to just to break even on the cost of the holder vs. 4x5 film with partial waste. JMHO
I have a Toyo45a it seems pretty sturdy...
So calmut and cambo are the same? Are there other brands that slip in like a holder besides these?
Indeed, that's a solid camera. So the only other potential problem I can think of is if there's something about the back design that obstructs the slide-in holders from going all the way in. Unlikely with the Toyo, I would think, but try to buy with a return privilege if at all possible.
The 6x12 slide-ins are the Cambo/Calumet C2N and the Sinar Panorama / Vario / Zoom / Zoom2. The Panorama is 6x12 only, while the Vario / Zoom / Zoom2 are variable-format, IIRC they have settings for 6x4.5, 6x6, 6x7, 6x9 and 6x12 - perhaps David can confirm.
I don't know whether the Chinese 612 backs have twin pressure plates; however, my Chinese 617 does, and it keeps the film as flat as a shit-carter's hat. Twin plates with strong-ish springs is a design that can't easily be bettered IMO.
In addition, the tension spring on the film spool means that there is good resistance when advancing the film, also assisting flatness.
I can GUESS at which are "the Chinese" backs, but it would be helpful to know which you've specifically used.
Thanks.
The DaYi 6x17 back I had was quite sturdy and had no plastic parts, and it had a straight film path. It didn't have a frame counter or the large roller and constant film tension of a Linhof back.
Confirming Oren's post, my Sinar Zoom back does 645, 6x6, 6x7, 6x9, and 6x12.
The potential for the light leak is with the Sinar Zoom I and perhaps the earlier ones.
One issue is a plastic strip that can deteriorate or go missing. Replace it, and you're good, but people sometimes have problems, because it's disappeared, and they don't know it's supposed to be there.
The other is that the curtains used to adjust the frame size might not close completely or the track could become damaged so they don't stay straight. One of the improvements in the Zoom II, if I understand correctly, is that in addition to the curtain to adjust the frame size, there is a separate conventional darkslide, so the curtains don't have to do the job of keeping the light out when the back is removed from the camera.
why don't you prove to everyone how smart you are by just cutting down the film and taping it to regular 4x5 film holders--no issues at all-no expense at all. I know everyone looking for "on the cheep" to look genius.
or convert a 4x5 film holder--just tape some paper or plastic "rails" to slide in the smaller film. voila.genius cheep
But it sounds like the cambo/calmut is a better choice then? I don't hear anyone listing issues with that?
I don't care about "difficulty in loading film" I don't seem to struggle as much loading film like others do, they say the Mamiya RZ67 backs for example are hard to load, but easy for me, same with others so I feel like its not something to worry shoot...
I ask twice sometimes because there's the "I heard" info, and the "I've experienced first hand" info and sifting through it to understand fully is my plan.
Small grain of sand, I've already told you that in my searching I found complaints about Cambo/Calumet roll holders. I didn't say, should have, that all sizes seem to be problematic. Problems reported include fragility, scratching film, and tearing film.
Its time for you to do some searching yourself.
The Sinar holders use a separate cassette to hold the film spools, and you have to manage the insertion of that into the body of the holder together with threading the film over a very long U-shaped path. For my taste it's fussier than the small backward-curling inserts that are the usual standard for interchangeable medium-format backs. It's awkward in the field, and there's a lot more surface area to keep clear of dust and grit. If you lose the cassette the holder is useless. OTOH, if you acquire extra cassettes, you can load them in advance and slightly speed up the process of changing film.
I owned a C2N in 6x7 format. The internal construction was pretty chintzy. If you care about printing full frame with border (I did at the time, less so now), know that the design of the film gate produced three crisply-defined edges and one fuzzy one. Take Dan's good advice and exercise your Google skills on this before you take the plunge.
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