I didn't have a PD prism but I did have a CDS metered prism and found it to be very accurate when compared against my RZ AE prism (I also have the FE701), and against my digital Pentax spot meter. I liked the CDS magnifier (chimney) finder better though. I found both the CDS prism and the CDS magnifier finder to be easy to calibrate myself just by removing the dial and repositioning the plate inside (I recalibrated both of them to be accurate with a brite screen I was using, and then recalibrated them back for the regular screen when I sold my RB gear).
Yes, you still have to set the aperture and shutter speed when using a metered finder on an RB, but you don't have to compensate for filter factors or bellows/extension tube factors because you're still metering through the lens.
Very interesting. You have me thinking I might have a bum PD prism... Do you know, max_ebb, if a PD can be "home" calibrated like your CDS?
Is your PD prism reading too fast or too slow? Are you using a brighter screen than a regular RB screen? Are you setting the finder for the lens you're using (3.8, 4.5, 6.3, 8)? With all the RB metered finders, you have to set them for the lens that you're using. If nothing else, you can compensate when you set the film speed if it's consistently off a set number of stops.
Get the RB,....Also look for a hefty tripod, you are nearing 10 lbs of camera here.....
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