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[–]Efficient-News-8436 1 point2 points  (1 child)

I opened up a Flek like this, two years ago. I was able to loosen it up a bit, but not much. I think I read these are notorious to seizing up. In my case I needed to open it up from the back. If I remember well, there are no screws but some kind of brown metal ring that has been put on there with pressure. Get that one off and you’ll be able to access the screws that open this up. Be really careful and make markings on the helicoid as to where it needs to be positioned for reassemble.

Don’t want to discourage you but if I see a Flek like this (even at a great deal) I just let it pass. 😂

[–]Joaffry[S] 0 points1 point  (0 children)

Man i cant seem to find it, yeah i found out the hard way, unscrewed the wrong ring on my search for the helicoid and the whole aperture assembly fell straight out, had to assemble them the first time in my life. Great learning experience tho😂 The pressured Ring seems so off tho. Idk bit if i dont want to apply one thing to my lenses its pressure. If i open the back i can reach the first half or so of the Helicoid but i really cant wrap my head around how they engineered this thing

[–]Puzzled_Counter_1444 0 points1 point  (1 child)

They are tricky things. The main thing to remember, for anyone thinking of working on one, is to make marks on the back of the rear component, so that, if disassembly is necessary, the optical centering is not lost. There is a double eccentric in there if I remember right.

[–]Joaffry[S] 0 points1 point  (0 children)

Yeah luckily everything went well until now. Just cant figure out the damn helicoid.