Mamiya Polaroid Back Question

[LaGrassa]

HI, I just got a Polaroid back for my Mamiya 645AFD. There doesn't seem to be an indicator near the film speed dial to show what the film speed is set to. Does anyone have any experience to know? Perhaps the indicator on the back itself near the dial is worn off? Would appreciate any help. Thanks.

 

[keithwms]

The back that I have doesn't communicate the speed with the camera. So it doesn't make any difference what it's set to, it's just a reminder and you can ignore it.

 

[LaGrassa]

I'm sure my back does communicate with the camera. I can see the selected shutter speed change (while looking at the same object with the camera in A mode) as I rotate the Back's speed dial. From doing this I can see where a large jump is made, and then that's the "change" from ISO 25 to 6400. I can use that as my reference and adjust the dial in clicks until I hit ISO 100. I double checked this setting using sunny 16 and it seems pretty close. I'll give it a test run.

 

[keithwms]

Oh interesting, the back is different from mine then.

 

[LaGrassa]

Using my method to figure this out, it appears to be close in exposure, perhaps just a tad overexposed. I'll compensate a bit next time, as I did peel apart at the time specified for the ambient temperature.

Having gotten this back with 6/10 shots still loaded for $25, I surely can't complain much. The image size is very small however, smaller than I expected.

 

[LaGrassa]

In viewing some photos of this back, it appears there should be a white dot adjacent to the ISO speed dial to indicate the film speed set. It looks like it is pretty close to where I guesstimated where it would be, based on my trials above. My particular back has worn-away areas in this location.