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chris_burck1

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  1. I purchased a lens recently which has led me in direction I didn't expect. It's an Ilex. In barrel, later vintage (I think--it "feels" '60s or '70s vintage, side and black). No diaphragm. It is marked simply: "6⅜” f:4.5 ILEX PARAGON MADE IN U.S.A." No other markings of any kind, not even a serial number. The rear lens cell has the numbers 164.4 scratched into the outside perimeter {presumably the back focus). A cursory test on the ground glass shows this thing to be *really* sharp even at its fixed f:4.5. Anyway, I have a copy of their Series S Caltar in Acme #3, and took a small gamble on this Paragon, thinking the cells were almost sure to go right into the Acme. Boy was I wrong. Turns out that the Acme seems to have a different thread pitch on the front, than the rear. The Paragon cells are completely interchangeable on the barrel, and the rear cell screws right into the shutter (and so would the front, if the rear of the shutter had enough depth). But neither Paragon cell, nor the rear cell of the Caltar, will screw into the front of the shutter. I don't recall ever running into a situation like this before (though, by the same token, I don't know that I've ever tried swapping cells around, either), or even seeing a reference to it. Certainly, I have observed that some shutters have a different diameter at the front than at the rear. But different thread pitch? Is this. . . normal?
  2. Thanks for the replies, guys. Unfortunately, I'm on mobile for the time being, which complicates matters somewhat WRT to posting pics. For that matter, even when on desktop, posting pics to threads like this is sometimes challenging for me. Perhaps I overcomplicate things. I had already considered the hot/cold trick, and discounted it on account of being too complicated given the size and configuration of the assembly. But, that said, I got the pieces separated the other day. Just a matter of letting the penetrating oil do it's work, I guess.
  3. BTW, my apologies if I've posted this question to the wrong place. But it seemed to be the closest match. . . .
  4. I came into an old Process Velostigmat, still attached to it's prism and in very clean condition all around. Only problem is, I'm stumped on how to get the lens off the mounting plate that it's screwed into (I was able to separate the mounting plate from the rest of the prism enclosure by loosening some screws). I very sparingly applied some penetrating oil to the threads, but after 24 hrs it continues to stubbornly resist my efforts (and trust me, I'm using plenty of elbow grease!). I *could* use the lens as is. However, I had this crazy notion of adapting the prism to my 6x9 press camera (or possibly my 4x5), so I kinda need to get that plate back onto the prism enclosure. Not to mention that general handling would be easier without that thing hanging off the end of the lens. Anybody got any ideas? Is it just a matter of giving the oil more time? Or is there something else going on here, like maybe they used some sort of thread locker? Any help would be appreciated.
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