Petri 7S Service

[ArchimedesTheDog]

Anyone know a good resource for Petri 7S maintenance/service? My example works great, but the rangefinder is really low contrast and I suspect it could use a good cleaning.

 

[BernardL]

If "low contrast" of the RF patch with respect to the rest of the image, and leaving aside a replacement of the splitter (or dichroic) mirror, one possibe fix is to decrease the brightness of the main image. Try placing in front of the main V/F window a neutral density filter or a piece of fogged B/W film. Once you found the piece of film that is "just right" you can trim it to size and insert it permanently under the top cover. This worked for my Oly 35RC.

Cleaning might help, but the common wisdom is do not touch the semi-reflective mirror.

 

[ArchimedesTheDog]

If "low contrast" of the RF patch with respect to the rest of the image, and leaving aside a replacement of the splitter (or dichroic) mirror, one possibe fix is to decrease the brightness of the main image. Try placing in front of the main V/F window a neutral density filter or a piece of fogged B/W film. Once you found the piece of film that is "just right" you can trim it to size and insert it permanently under the top cover. This worked for my Oly 35RC.

Cleaning might help, but the common wisdom is do not touch the semi-reflective mirror.

Thank you, I appreciate it.

 

[dourbalistar]

Short of replacing the beam-splitting mirror, Rick Oleson has a possible solution for dim RF patches, using a small piece of black tape or sharpie marker:
http://rick_oleson.tripod.com/index-165.html

 

[xavyr]

Short of replacing the beam-splitting mirror, Rick Oleson has a possible solution for dim RF patches, using a small piece of black tape or sharpie marker:
http://rick_oleson.tripod.com/index-165.html

Thanks! That technique of Rick's is brilliant