I got a little bored today and took out the Nikon 50mm lens given to me by dad couple of months ago. There’s fungus in the lens and I wasn’t bothered to send it for service as I do not have a Nikon Series E camera to use it with. Well, I got bored and did an attempt to disassemble the lens to clean up the lens. The terms I use maybe incorrect as I am not a professional in lens service, this is just to share how I serviced the 30 year old lens on my first try.

[ front lens ]

[ rear lens ]

I took out my precision screw driver and started disassembling the back part of the lens. Unscrew 3 screws at the back of the lens mount, and take out the lens mount piece. Next I took out the aperture ring and unscrew 4 screws, 2 screws at each side of the lens on top of a metal piece that limits the ring of the focusing range. Then later, I realized that I disassemble the wrong part of the lens. Holy smokes! I accidentally disassemble are the mechanical control part of the lens. I decided to assemble it back all together and start again.

[ the mount piece ]

[ the aperture ring ]

[ without the aperture ring ]

[ after removing the focus ring from lens glass ]

Back to the start, I disassemble the lens starting from the serial number plate. To unscrew the serial number plate is a little tricky. I paste a double sided tape which has foam in between and use the rear cap of the lens to unscrew it. Remove the serial number plate to reveal 3 screws. Unscrew the 3 screws, remove the piece to reveal another 3 screw. Here, unscrew the 3 screw and take out the front element of the lens. Voila! The interior part of the lens is now exposed for cleaning.

[ tape the serial number plate ]

[ unscrew it with using lens rear cap ]

[ 3 screws revealed ]

[ another 3 screws revealed ]

[ removing the front element of the lens ]

[ inside the lens ]

[ clean it with proper lens solution ]

After cleaning the lens, it’s now fungus free! Placing the lens together with my other 50mm lens. Comparing Minolta Maxxum AF 50mm f1.7 with Nikon Series E 50mm f1.8. You may pop this question out, why would I want to service a Nikon lens when I am using a Sony / Minolta camera system? Reason is, this Nikon 50mm lens manually controls the aperture via the lens itself, it’s ideal for Reverse Coupling Macro as I can change the aperture number of the reversed lens easily.

[ the Minolta Maxxum AF 50mm and Nikon Series E 50mm ]

[ the Minolta Maxxum AF 50mm and Nikon Series E 50mm ]

My next possible tryout project, to disassemble the Sigma 70-250mm for Nikon Series E. That’s if I had a lot of time to spare.

[ the Sigma 70-250mm Lens for Nikon ]