I have a Pentax 6x7 made in the 1980's. I lost the eye-piece frame that screws in to the view finder of the TTL pentaprism. The ring has a grove for the eye-cup. Do any of you know where I could find a replacement? Louis Jensen jenluc@charter.net
Hello The thread size is the same as for some Nikon camera eyepiece parts. Some Nikon rubber eyepieces and retaining rings fit. Try taking your camera into a shop and asking to try some for size. I think the one I used to use was a DK-2, but it was a few years ago. Regards, Ross