Mamiya RB67 Film Back

Theearlington · Feb 2, 2015

I've seen many similar threads but didn't find the answer I was looking for so Ill ask here.

I purchased a PRO S film back and I'm not sure if its working correctly. Is it possible to see if the counter works by cocking it without film? It seems to just stay on S the whole time.

Thanks

Vonder · Feb 2, 2015

No, if there is no film, it doesn't move.

480sparky · Feb 2, 2015

It is possible to get the frame counter to move without film.

Push down on the small metal tab (1) with your fingernail. Move the roller (2) the direction it the paper backing of a roll would if one were installed and being advanced (ie, right to left, or from the spool side around towards the pressure plate). If you hold the metal tab in without letting up, the frame counter will advance. You do not need to use the film advance lever for this.

tkamiya · Feb 2, 2015

An easiest way to do this is to use spooled backing paper from processed/discarded 120 film.

Theearlington · Feb 2, 2015

Thanks guys!! I got it to work. It makes sense that the parts have to move for the counter to work.

Mamiya RB67 Film Back

Theearlington

Vonder

480sparky

tkamiya

Theearlington

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