I picked up a very nice Fecker scope yesterday at a show and when I got it home both lock rings were tight and wouldn't move. I got them loose by putting a drop or two of Kroil on both sides of the rings and they loosened up fine but the "egg" does not move or the erector lens cell. I put a couple drops of Kroil on both sides of that and let it run down between the cylinder and the scope threads. Today I used heat from a hair dryer but didn't want to go any hotter and it's still not moving so thought before I do anything else, I should find out from the pros that owned Feckers. I assume that when you turn one lock ring in one direction that that center egg should move back and forth depending on the direction but it's not. Am I missing something? Could they cell be stuck on the inside of the scope tube? Any ideas where I should go next? Thanks.

I have a 12x Fecker that was frozen and one of first things I did was lube that area. Doing that got oil inside the cell and on the lens and X hair so, be very careful when oiling that area.

"Creepy oil is a no-no" John Unertl said that to me.  If you must, use a dry lubricant such as LPS1 or one that Starett makes for use on fine measuring devices. I am sure there are others that would work as well. Those are two that I have used successfully. Even with those use very sparingly, and stay away from threads that penetrate the internals/lenses if possible.

bnice wrote on Apr 1^st, 2024 at 6:24pm:


I did loosen the screws and got the cylinder to wiggle a little on the scope body.  The cell was stuck inside the tube and I got it to move back and forth about an 3/16" of an inch.  It looks like the cell is made from aluminum and not brass like in a Unertl. That may be why it's not moving like it should as aluminum tends to oxidize over time. I'm going to keep working at it by adding a little lubricant a drop at a time with a syringe.