Fix Old Cameras: Nikonos O-Ring Maintenance 

+pat keenan Thank you for the tip on acquiring useable O-rings for these great cameras. Yes, the internal O-rings, particularly the lens O-Rings are much bigger undertaking.

Pat, would you mind posting the specs of the o-rings or the URL of the website you found them?

Your support and interest in FOC is greatly appreciated.

Thank you for you interest in FOC.

You are welcome.

i need to fix this as well. did you have any luck finding out anything about how to do this?

@@FSUvinny Yes, I fixed it by changing the battery. There is a part in the manual that talks about this problem. Hope this can help you.

@@supertramp_film changing the batteries? I have brand new batteries in mine though and it's just started sticking/is stuck now. The film advance lever won't budge now.

@@FSUvinny I don't know, maybe the lock lever button?

Jasper FSX A top cover removal for a Pentax MX could be featured in a Fix Old Camera Video. Thank you for your suggestion and comments.

recmy1982 The rear elements of the Canon 50mm FD 1.4 can be removed without complete disassembly of the lens proper. Be very aware of the order and position of the individual elements. Take pictures and notes for insurance of proper reassembly. Hopefully the fungus is of the type that responds to cleaning.

Chamal Upulitha The self timer is buried in the lens assembly unit and requires a fair amount of disassembly to access it. The blades could also be stuck together from oil that migrated on to them.

Fix Old Cameras Thank you for the reply sir. I started disassembling the front lens elements in Canon QL19 and got the self timer lever unstuck. You are right, its a lot of work. But I was very careful and everything worked well. As it appears now both the shutter and apperture blades are the real problem. They are stuck. I managed to manually open the shutter by rotating the round lever around the shutter and worked two or three times then gets stuck again. I hear this is a common problem in canonet QL cameras. I read about a blog post removing the sticky oil by spraying the aperture and shutter blades with a solvent, which can be done once all the lens elements are removed. There were two lens elements in the back of the camera and I removed the outer one easily. But I can't remove the other lens element from the back because the lens ring diameter is exactly same as the film chamber diameter. I can turn that ring back and forth a little but can't unscrew totally as it hits the chamber walls. I was very surprised by that fact. Looks like I have to remove the entire front lens assembly from the body. Could it even be done? I don't know the procedure to do it. Even though I could clean the shutter I can't get to the aperture and I don't think its a good idea to spray or pour anything with a lens element. :-(

Flush cleaning oily shutter blades is not ideal but often times an acceptable procedure to free the blades. The glass needs to removed for if the solvent gets between the lens groups it will be trapped and leave a residue. You might be able to work the lens group retainer out with the tip of a small slotted screwdriver. It not, the lens assembly is attached to a plate that is in turn attached to the body of the camera. The top cover will need to be removed. The front leatherette will need to be peeled back. The bottom cover will need to be removed. Be mindful of the linkages connecting the rangefinder, the shutter wind mechanism and the shutter release mechanism when the lens mount plate is removed. Good luck, your persistence is admirable. If you chose to flush clean the blades the following link is a good product. It is featured in several Fix Old Cameras videos. astore.amazon.com/fixoldcam-20/detail/B001OLVB34

+ziggyx27 Isopropyl alcohol is safe to use. Also after use while the camera is still sealed rinse the camera in clean water.

If a seal or o-ring is bad it will need to be replaced.

If you have a local shop that sells O-rings take the old ones in and match them. Be sure you get the proper hardness and flexibility. The size for Nikonos II body O-ring O-ring standard size #223 of BNR (buna-n black rubber) The size of O-ring for Nikonos lens O-ring standard size #224 of BNR (buna-n black rubber) . Measures of 7 Nikonos O-rings Internal measurement (mm) - Thickness measurement (mm) 2.4mm Internal - 1.9mm Thickness 4.9mm Internal - 1.9mm Thickness 9.92mm Internal - 2.62mm Thickness 4.2mm Internal - 1.9mm Thickness 9.25mm Internal - 1.78mm Thickness 2 each - 3.69mm Internal - 1.78mm Thickness

It would be great if someone could say anything about the hardness. The standard hardness is 70, but the 9.9mm 2.62mm is only available in 90. Also I look for NBR as the proper material.

+L.H.O.O.Q. If you are referring to a Nikonos lens then you could have a misshapen o-ring that is causing the added friction.

+Fix Old Cameras it is a Nikonos 80mm. Thanks for the tip.

Louis Vansteenkiste The plate that covers the counter end of a Hasselblad film back can be removed. The screws that hold the plate in place are hiding underneath the leatherette.

Just make more videos about everything! Love your work, man!

We thank you for your encouragement.

+pat keenan Well... that is a bit funny. According to Google, my shop is 1000 miles from the Gulf of Mexico and 1500 miles from the Pacific or the Atlantic Ocean. But with that said for future reference the shop information can be found at www.phototronic.biz With the corral reefs and ship wrecks in your neighbor hood, surely there are some local camera repair shops that would help you with the Nikonos - V internal O-rings. There are seven internal o-rings with the following groups of numbers being very close to the dimensions. The first number of the group is the internal size in millimeters the second is the thickness in millimeters. (2.4 - 1.9) (4.9 - 1.9) (9.92 - 2.62) (4.2 - 1.9) (9.25 - 1.78) 2 each - (3.7 - 1.78)

@@FixOldCameras Since there seems to be no camera repair shop operational anymore, which is maintaining the Nikonos V, it would great if you could make a video about the replacement of the internal seals.

replace it, if you want prevent flooding of your camera. But if you don't take it underwater, it can stay inside, even during a rainshower.