Rotary development question for Rollei ATP 1.1 and AGFA Copex Rapid films

[Daniel Huiting]

Hi all, I've been shooting some films such as Rollei ATP 1.1, AGFA Copex Rapid, and ADOX CMS II, and all of them recommend not using a rotary machine for development because it will cost you about a stop worth of sensitivity. I bracket with these films and overexpose by at least a stop anyway, so if that's the ONLY reason not to use rotary processing, then I will continue to do it. I have no problem just rating the film at a lower ISO to compensate for any sensitivity loss caused by the rotary developing.

I like using a rotary developer for many reasons, but the main one is being able to use less chemistry to develop the same amount of films, which, anyone who has spent tons of money on the "special" developers that these film manufacturers suggest that you use with their films can attest, is a pretty significant money saver.

So if there is some significant shifting around of the highlights and shadows that I should be aware of with rotary development vs hand tank development when developing these kinds of films, then I would like to know about it. If it's simply losing a stop worth of sensitivity, and that's really all it is, then I will continue to process these films in my Jobo and just expose a stop or two over when taking my pictures.

thanks!

 

[darkroommike]

These are document films and can be pretty sensitive to contrast effects from agitation. I suspect you'll lose film speed and gain contrast with any continuous processing scheme but you'll have to try it and see.

 

[ic-racer]

I had about 400 feet of something that could have been Agfa Copex. This is how I processed it.

(there was a url link here which no longer exists)

I don't have the film any more.

 

[Raphael]

Hello,

I process all my films, including Adox CMS 20 II in rotary processing (using a Jobo ATL), and maybe I'm wrong, but I don't notice adverse effect on contrast with this film !
But maybe it's matter of taste...