ETRSi and ETR polaroid back

[jared_purdy]

I recently purchased a used ETR polaroid back and fumbled through

installing it on my ETR Si body, wasting several pitures from a brand

new pack of Fuji Pro polaroid film in the process. I don't know if

I'm doing something wrong, but the film crank (on the speed grip)

doesn't stop after turning several times, and as a result, I can't

get it to fire. I have found that the only way to get the shutter to

release is to use the mirror lock up leaver. Unfortunately I do not

have the booklet with the back. Does anyone have any experience with

this combination and secondly, have there been changes to the design

on the backs?? The one I bought used appears to be in immaculate

condition, though I suspect that it may be a few years old (though I

can't be sure). It has a thick wire closing mechanism, and I was

under the impression that there was a newer version that uses a

different design? Any help would be appreciated. Regards, Jared

Purdy.

[chris___10]

I think you have to use the multi-exposure lever to get the shutter to recock with the polaroid back on. Try that. (dont forget to switch it back before changing to film!)

[craig_dumesny]

Chris is absolutely correct, Jared. Place the Polaroid back on the body just as you would a film back, place the multi-exposure lever down to multiple exposure and wind on until the shutter cocks; recock the shutter for another Polaroid or flip the lever up to return to normal film shooting after you have made an exposure. A quick tip on exposures for Polaroids - expose them a little under, about 1/2 a stop, just like exposing for trannies and you'll be just fine with them.

[jared_purdy]

Thank you all for your time and advice. I ahve since discovered the problem, as you all have so accurately suggested re: the multiple exposure leaver! Regards, Jared Purdy