A friend has my Wista Dx and is now having issues with ground glass focusing. It had been a workhorse for me with no issues so this is a surprise.
The problem he's encountering is that when an image is properly focused on the gg, the image on the film is out of focus. It appears to be back focused about 25' or so (his guesstimation).
I've gone through all I can think of and he's not a lf newbie either. Ground glass is oriented properly, film is loaded correctly and holders sit as they should. I'm stumped. He'd read somewhere that Wistas weren't always calibrated properly which was news to me and he's trying to see if shimming the gg will help.
Any ideas on what the root cause could be ?
tia,
Fred
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