Complete Guide to 70mm Film

film4eva · Jul 3, 2025

I was wondering about that. I was thinking that it'd be difficult to fill and drain in close timeframes to balance out the amount of dwell time at two given, distant, points on the film.

I guess the other thing is for me to really decide if I even want to chase 70mm, or if 65mm could be my jam.

MCB18 · Jul 3, 2025

Nokton48 said:
I have found that you need a slow-working developer, as it takes a couple of minutes to fill or dump my Kindermann, it's like weight lifting, you will get a workout. I use mine with ADOX Borax Replenished which is a D76 Derivative. With Replenished Microdol-X Straight Replenished very long times are appropriate for me; I've gone as long as 28 minutes with some films. Just Sayin".

To solve this issue I plan to just develop in my darkroom, at least for now. Would need to find a way to time dev and agitation in the dark, but this is probably pretty easy to do. I am designing a developing tank for 70mm and 65mm that I am trying to get fill and dump times as fast as possible (30 seconds ideally), but we’ll see how that works out.

Nokton48 · Jul 11, 2025

DSC05808 by Nokton48, on Flickr

This one I own has a 4x5 Graflok Back on it. I think I paid $35 back then.

DSC05820 by Nokton48, on Flickr

I filed out this Omega 4x5/70mm Carrier to take full frames from my smaller Beatty Coleman. Can see the sprocket holes in the edges of the prints.

Complete Guide to 70mm Film

film4eva

MCB18

Nokton48

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