Thanks Alan, I think my 80mm and 150mm lenses do focus correctly but I shall double check since you raise an interesting point. I did actually have a mirror rest replacement myself a few years ago after a tripod keeled over and bounced my poor 645. Regards, Pete.

By Anonymous on Saturday, March 06, 2004 - 09:21 pm:

How do you know it's not your mirror that's out of alignment?

The distance from the lens to the film plane must be exactly the same as the distance from the lens to the focusing screen. If the mirror rest angle is wrong the two distances will not be the same. The mirror rest position can be adjusted

I had the same problem as you with the 80mm lens on my second-hand 645 super. The dealer took the camera back and sent it off for repair under guarantee and now the focus is perfect. When I focus on an object that's at a measured 2m from the film plane, the lens reads exactly 2m. That was not the case beforehand.

The repair docket stated that the mirror was out of alignment and that a part that holds it in the correct position had to be replaced.

Hope this helps

Alan

By Peter Saunders on Friday, March 05, 2004 - 12:18 pm:

Thanks Alan, I shall give them a try. Regards, Pete.

By Alan on Thursday, March 04, 2004 - 08:50 am:

Peter,

If you are UK based, you can speak to a Mamiya service technician on 01782 753345. Be prapared for him to politely "warn you off fiddling", though.

By Peter Saunders on Wednesday, March 03, 2004 - 09:49 am:

Can anyone tell me how to locate the screws to reset the focus and how to go about it? The lens is actually in focus at 10 metres when the lens barrel says infinity is in focus. If you want to warn me off fiddling that would be fine too!