The best cleaner I’ve ever used is ROR (Residual Oil Remover, www.ror.net). It simply cleans better and with less effort than any other solvent, yet is non-toxic. A report on ROR’s site about cleaning camera lenses was hard to swallow until I saw the effect of cleaning a brand-new eyepiece and saw the difference in [...]

I’m careful with my lenses, but still, they need cleaning periodically. I’ve been using ROR for about six years on all my optics ranging from collector camera lenses to everyday camera lenses, and the eyepieces and objective for my telescope.  It’s never damaged a coating. I blow dust off and then brush the lenses with [...]

Several years ago I had the opportunity to try a lens cleaner that made a claim of adding up to two f/stops of light transmission. (The product was called ROR, short for Residual Oil Remover.) That got my attention and I took up the challenge by checking a Mamiya RB 180/4.5 lens with a filter. [...]