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01-23-2018, 08:17 PM   #1
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Original 645 Rare Option? Half Stop Exposure Compensation

So I have a "common" P645 and I just ordered an additional one as a back-up from a shop in Japan via eBay. (I ordered my other one in the same manner) Anyway, the one that I've been using is likely common to yours as the dial wheel on the left rear is for SINGLE or CONTINUOUS shooting. The new one is like the old one as they are both original generation models, but the new one has a different dial wheel. Instead of C/S, it's a half stop exposure adjustment. ALSO the guard wall surrounding the ON/OFF switch on the handle is beveled like a ramp instead of simply raised above the ON/OFF switch. Anyone ever see this version before? Or have info on it? The serial number on this one I just bought is a little older than my other one (which I estimate to be an early 90s production era). You can see these two serial numbers that I've entered in the serial numbers section of this webpage. Questions, comments, or answers welcomed. Thanks!

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01-23-2018, 08:47 PM - 1 Like   #2
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I have one like that. When I asked the same question you did one of the members here told me that it was a factory modification for shooting slide film. He said that he had only ever seen 2 of these and mine was the third. Since then another forum member got the same model. I haven't looked into it more, so that's all I know.
01-23-2018, 11:08 PM - 1 Like   #3
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I remember reading somewhere that this could be done as an option. I think it would be pretty useful, though you can roughly simulate it by changing the aperture by a half stop (since the shutter speed is in full stops). My 645 is the standard version.
01-23-2018, 11:47 PM - 1 Like   #4
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So what does the +- EF button do on your version now that exposure compensation is on this wheel?

It's the top of the three buttons on the left.

Regards

Chris

01-25-2018, 03:07 AM   #5
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QuoteOriginally posted by seventhdr Quote
So what does the +- EF button do on your version now that exposure compensation is on this wheel?

It's the top of the three buttons on the left.

Regards

Chris
Hi Chris,
The +/- EF button still operates as normal, but can be used along with this wheel for a finer level of adjustment. The button does whole stops and then I can spin the wheel + or - for additional 1/2 stops. OR: I can just use only the wheel for 1/2 stops whilst leaving the button at 0 EF.
01-29-2018, 01:16 PM - 1 Like   #6
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Okay. Thanks for that update.

Regards

Chris
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