Complete Guide to 70mm Film

[rhizomeblur]

I have an RB67, size isn’t exactly a big concern lol. Plus, I got it for $10 with a set of cassettes, well worth the 98% discount compared to the actual backs you can buy on eBay I think.

Ha, good point! And yes, that's a big cost savings!

 

[MCB18]

Well, I got my 70mm x 15 ft spool printed. Bad news, it doesn’t work. It was too wide at first, and then I tried sanding down the middle part, and now it’s too small… gonna have to see if I can make an adjustment in CAD and figure out how to get it reprinted since I really don’t want to ask the guy as my school to reprint it (again…)

 

[Sonynolta User]

Well, I got my 70mm x 15 ft spool printed. Bad news, it doesn’t work. It was too wide at first, and then I tried sanding down the middle part, and now it’s too small… gonna have to see if I can make an adjustment in CAD and figure out how to get it reprinted since I really don’t want to ask the guy as my school to reprint it (again…)

If you send me the STL, I might be able to give it a try. I have some 70mm, so I could at least trial fit.

 

[MCB18]

If you send me the STL, I might be able to give it a try. I have some 70mm, so I could at least trial fit.

Yeah I can send an STL. I might make a few adjustments to it.

 

[MCB18]

Played around with this some more. Yes, it does work, and it does hold an entire 15’ roll of 70mm. But it is extremely finicky and I do not have any confidence I could load this in the dark.

 

[eli griggs]

Could you try making the inside film tracks undulating, starting with the current starting place as is and a mm or two reaches like a wave in an old fashion apron ribbon, so it'll hold the film in place but able to cope with various widths in general, without the need for such fickled precision?