How to disassemble this lens?

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rondo

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Hi, I hope someone can help. Judging from this picture, can anyone guess how this lens can be disassembled?
The three recessed holes in the back are approx 2 mm deep. There is no indication of any screws in the holes. Maybe they are to receive a three-legged apparatus that you use to unscrew the back plate? I am thinking that the back-plate is threaded into the lens housing, but maybe I am wrong...If I manage to remove the back-plate (made of aluminum maybe?) I am hoping to be able to modify it to match another camera body...I guess, it is a long shot.
Any thoughts will be greatly appreciated,
Thanks,
 

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sectional diagram..guessing of course...if the back plate can come off i can grind it in shop. otherwise will need to be carefully done without disassembly. very risky as the glass could easily be damaged.
 

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Nikos72 said:
Cover the glass with some resin, grind the metal and then peel off the resin.
Click to expand...

thank you, nikos...not sure how that works though? what type of resin should i use? scared to damage the glass..also not sure how to do the grinding evenly without removing it from the housing. thanks again for the input!
 
I'd be bodging together a three-legged tool before anything else. Take your usual two-legged device and a third pin of some sort, lean the whole bunch together in the middle, wrap a little electrical tape around it to hold it together, and twist.

If you can't get it out and decide to grind anyway, a harmless way to cover the glass is some white glue with a drop of dishwashing liquid in it. It will harden enough to cover the glass, but will peel off easily with no residue (old scale modeller's trick).
 
rondo said:
Hi, I hope someone can help. Judging from this picture, can anyone guess how this lens can be disassembled?
The three recessed holes in the back are approx 2 mm deep. There is no indication of any screws in the holes. Maybe they are to receive a three-legged apparatus that you use to unscrew the back plate? I am thinking that the back-plate is threaded into the lens housing, but maybe I am wrong...If I manage to remove the back-plate (made of aluminum maybe?) I am hoping to be able to modify it to match another camera body...I guess, it is a long shot.
Any thoughts will be greatly appreciated,
Thanks,
Click to expand...

This is one of the Fuji X adapter lenses, right? I'm just curious, why are you grinding the back down?
Jamie
 
Jamie Pillers said:
This is one of the Fuji X adapter lenses, right? I'm just curious, why are you grinding the back down?
Jamie
Click to expand...

You are correct! It is the Fuji teleconverter for the x100. I am trying to figure out if there is a way to make that work with Ricoh gr. the space between the back element of the converter lens and the front element of the gr needs to be about a mm closer.
 
rondo said:
You are correct! It is the Fuji teleconverter for the x100. I am trying to figure out if there is a way to make that work with Ricoh gr. the space between the back element of the converter lens and the front element of the gr needs to be about a mm closer.
Click to expand...

Meaning you need to take meat off of the silver metal rim seen in the first photo? If so, I wouldn't disassemble the lens. Appears to be plenty of room to work. Use one of the suggestions for protecting the glass. Clamp to a rotary table and mill to height, or whatever machining method you have in mind.

Also curious, how are you determining where the adapter needs to be on the Ricoh lens?
 
Dan Daniel said:
Meaning you need to take meat off of the silver metal rim seen in the first photo? If so, I wouldn't disassemble the lens. Appears to be plenty of room to work. Use one of the suggestions for protecting the glass. Clamp to a rotary table and mill to height, or whatever machinig method you have in mind.

Also curious, how are you determining where the adapter needs to be on the Ricoh lens?
Click to expand...

Thanks for your thoughts. In hand held tests, the closer they got, the less the vignetting. Therefore I want to place them as close as possible "by taking the meat off", just as you said... But obviously vignetting is not the only factor. Who knows what other problems I may be getting by placing them closer to each other.
you may have a point about keeping the lens intact and grinding it...I'll think about it.
Even if the problem of iq is solved, there is an additional problem: attaching the lens to the camera...but that's for later.
 
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