|USCamera Light Seal Installation Help – Mamiya 1000 DTL TL 500 DTL TL Series Custom Light Seal Kit
Again before you do anything, please read the general instructions on removing and installing light seals here.
Next, take all of the seals out of the kit and lay them out on your work area. This kit includes,
2 x 1mm – back cover channel seals for the camera body
2 x 2mm – back cover channel seals on back cover (much wider and thicker than the camera body seals)
1 x 1mm – back cover hinge side seal for camera body
1 x 2mm – back cover latch side body seal
1 x 1mm – mirror cushion
Tech Note. It is easier to install the back cover hinge seal and the channel seals on the back cover with it removed from the camera (but not necessary). To do so, you will need to remove the bottom cover. First remove the rewind button. Important!! The rewind button is a left hand thread. To remove it, carefully insert the points of straight tweezers or another similar type tool, into the 2 holes on the button. Turn the tool clockwise and the rewind button will unscrew. Now remove the four screws retaining the bottom cover. With the cover removed, locate the hinge pin plate and carefully remove the 2 brass screws retaining the plate.
Door channel seals, back cover. On the door latch end of the film back, measure 3mm down from the edge of the back -into the upper door channel and mark it with a pencil. Measure and mark the lower door channel the same. This is the starting point for the back cover channel seals. Starting at the mark you made, remove the backing and install the upper seal on the back cover from right to left. Do the same for the lower seal. The images below show the seal start position.
Hinge seal on back cover. This seal is installed by centering the seal between the upper and lower door channels on the back cover.
Door channel seals, camera body. When installing the channel seals on the camera body, always start at the hinge side and work to the left. The top and bottom body seals are the same length. When installing the upper seal, cut off a 21mm long piece and install that seal starting at the hinge side to the counter lever. Then install the rest of upper seal from the other side of the counter lever to the rewind end of the camera. Then install the lower channel seal on the camera body.
Back cover latch end / body seal. This seal is located under the door latch assembly. If you remove the leatherette on the door latch cover it will expose 2 slotted brass screws. Tech Note. As you remove the latch assembly, watch for the door latch spring under the latch plate as you remove the latch cover, it can be launched across your room and lost if you are not watching for it.
Mirror Cushion. Tech Note. Many production units of these Mamiya models did not use a mirror cushion. A special type of felt was used and this does not need replacement. We do not recommend removing the felt cushion. However if your camera uses a foam cushion we have included that in this kit. If your mirror cushion needs replacement with the utmost care, remove the old and install the new mirror cushion. Remember if any thing touches the focusing screen, it will likely be permanently damaged.
Reverse the order of disassembly above to replace the bottom cover and back cover latch assembly.
Congratulations, your old film camera will now give you thousands of light tight exposures for many years to come.
Mamiya 1000 DTL TL 500 DTL TL Series Custom Light Seal Kit