Mamiya M645 Series Mirror Kit Placement Guide
Mamiya M645 Series Mirror Kit Placement Guide
Before doing anything, please go here
Mamiya M645 Series Mirror Kit Placement Guide
For more information on purchasing this kit, go here.
You are installing a 3 piece mirror kit for the Mamiya M645 1000, 1000S, and M645 J mirror frame and cushion.
A custom kit for the back cover and door channels on the body is available here.
This kit includes,
24 x 2 mm – mirror frame foam, R/L
1 x 3mm – mirror cushion, camera body
Tech Note. Use something to protect the mirror while you are removing / replacing the cushions. To properly install the these damper cushions you will need to remove the black viewfinder mask under the focusing screen assembly. DO NOT turn the focusing screen adjustment screws. These are visible after removing the focusing screen assembly. 1 left rear corner, 1 right rear corner and one front/center. The other 3 screws visible are the mask retaining screws.
General Installation Guidelines
Damper cushion, front. This seal needs to be installed 1st. It is easier to install this seal with the lens mount removed but that is up to you. Because of the disassembly involved we cannot address that here. Install this seal centering it on the front casting using the front finder adjustment screw as a reference.
Damper cushions, right / left. With the frame and screen assembly removed you will see 2 small strips of fabric that are lightly glued to the side finder frame. You do not want to completely remove those strips. Carefully peel the fabric from the front to the back until they are clear of the cushion. Use tape to keep them out of the way. Now you can remove / replace the right and left side damper cushions.
The most important and time consuming work is removing the old seals. Focus on clean, clean, clean. Clean the old residue from the door channels, mirror cushion area, door hinge area and anywhere else you are replacing the seals. The finest adhesive in the world will not adhere to that sticky, gooey residue that was once a quality light seal. Proper installation will give you thousands of light tight exposures.
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All done replacing light seals in Mamiya 1000s. Cannot find clear instructions for replacing the mirror cushion foam. USCamera shows triangular pieces for the sides, but I cannot find a picture or description that tells how they’re to be installed. The originals were shot, with no indication of original shape. I only discovered by noticing it in the mirror-up position that there is a seal under the front top of the ground-glass frame. Not mentioned in any instructions, not visible unless I stumbled onto it.
I did not get triangular shaped strips in the (complete camera) kit I ordered elsewhere; they may have sent me one wrong sheet.
I’m reluctant to guess at how to install the mirror cushions.
Thanks for asking that question Bob. Instructions for the mirror placement of the mirror baffle pieces, on the sides of the mirror is available here https://uscamera.com/mamiya-m645-mirror-cushions-placement-guide/ Also the placement guide for the M645 camera body is here https://uscamera.com/mamiya-m645-lightseals-placement-guide/ > What you are calling the “seal under the front top of the ground glass frame” is the mirror cushion. The 645 body placement guide shows where to put that cushion. I also try and tell everyone especially first timers sealing a camera, lay out the light seals as shown in the placement guide. It will be much easier to see how to place them.
Hi Gray! I have a question about this particular cushion kit (Custom Mamiya M645 mirror cushion kit).
I’ve already replaced the light seals and front cushion in my camera body, but the original L&R cushions were so deteriorated that I’m unsure how they’re supposed to be installed. I see the small fabric strips in the mirror box, but I have no idea which way the “fat” ends of the angled L&R strips are supposed to face, nor which surface they’re supposed to be mounted to. Any help — even a photo or drawing of a properly installed kit — would be wonderful. Thank you!