silent1 Posted April 19, 2005 Share Posted April 19, 2005 I've just acquired a taking lens and shutter assembly to provide partsto repair the focus helical on my Reflex II TLR (the original wasdamaged when I disassembled the lens from the shutter for shuttercleaning, shortly after purchasing the camera a little over a year ago). Now, however, I've got a quandary. The replacement lens has a number of fine scratches on the frontsurface; they aren't huge, nor are there enough that they'd likelyaffect image quality other than adding a little flare, but they arethere, and the glass in my original is pristine. I've had a suggestion that I might be able to lap out the stiffnessfrom the bent helical using very fine abrasive paste, but if thatfails I'll need to replace that part, which is also the cell for thefront-middle lens element, at which point the questions will be: Can I take the easy way out and simply replace the entire elementwithout degrading the image quality? I've heard of some lenses wherethis works well, and some where it doesn't -- which class is theAnastar (ca. 1949-1954) in? Alternately, is there a reasonably simpleway to remove the glass from the brass cell/helical unit, so as toswap just the actual damaged part? I can't see, on examination,whether there's an inner cell that unscrews from the helical, and I'djust as soon not damage the "new" part trying to disassemble apermanently assembled unit. Clearly, worst case, I can just swap all the glass and live with thescratches on the front element, or play "mix and match" with groundglass and loupe trying to recreate a combination that works well usingthe "new" middle, original front, and either rear pair -- but ideally,I'd like to keep my (exquisite) original glass... Link to comment Share on other sites More sharing options...
richard_oleson Posted April 19, 2005 Share Posted April 19, 2005 I haven't tried removing the glass from the cells in the kodak reflex, so i can't answer that part. I would think that swapping out the entire front cell would be a better bet, assuming the helical is intact on the mating cell behind it. I'm never a big fan of swapping elements within a lens but I have done it and it's worked out okay.... the risk of a mismatch is probably less if you keep the cell intact rather than remove an individual element from it, for reasons of alignment and centering. sorry i don't have a more specific answer.... rick :)= Link to comment Share on other sites More sharing options...
silent1 Posted April 19, 2005 Author Share Posted April 19, 2005 Rick, I was hoping you of all people who know. No one seems to have tried this (the camera-fix list came up blank, too, other than being the source of the lapping suggestion). So, I guess I'll start by trying to lap out the stiffness in the bent cell with the original glass, and if that fails, I can test the lens with the good middle cell mated to my original front and rear elements -- and leave swapping the glass in the cells as a last resort if get down to the point that the complete replacement lens doesn't meet my needs. Now, where'd I leave that film can full of 5 micron aluminum oxide, left from my telescope mirror? Link to comment Share on other sites More sharing options...
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