Aperture Ring Cleaning

[RTucker]

I have several lenses that have stiff aperture rings, how do you go about cleaning them. I tried to squirt some lighter fluid around the ring, it loosens it up for a few hours but that's it. What needs to be done?

[Roger Thoms]

If your talking about barrel lens Bernice Loui has posted detailed instructions in this thread.

http://www.largeformatphotography.info/forum/showthread.php?112683-30-quot-Artar-very-stiff-aperture-How-to-fix-OIL-!!!

Roger

[Dan Fromm]

Not all barrels are alike. Here http://1drv.ms/1uDRqVt are Bert Saunders' directions for disassembling and cleaning B&L lenses in barrel to make their diaphragms operate properly.