I recently purchased a Wollensak 15in 5.6 telephoto barrel lens that is in pretty good condition, considering it’s age (1943). I need to do a tear down to clean and relube to aperture ring, as well as clean the front and back elements. I have noted on other posts here that there are grub screws that need to be removed before the elements can be unscrewed. As far as I can tell there is one screw for the front and one for the rear. I have been able to remove the rear element, but the front is stuck. I’m wondering if anyone can shed a little light on this issue. Thanks all in advance!
***Update: I was able to get the front element off. First, I wrapped the front element in silicone tape, then placed a hose clamp over the tape. The adjustment bolt on the clamp went into the bench vise with a small wooden wedge (not shown)between the lens body and the vise to keep the lens from rolling as I unscrewed it from the barrel with both hands. I noticed when reassembling that I was about 3/32” shy of the original position that would allow the grub screw to thread all the way in. Still, the lens is plenty tight as is. The grub screw has been saved, but I doubt I will ever need it. Thanks to all below who helped.
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