Originally Posted by gjk5
lenses I know, I wipe them with the little Zeiss wipe packets or the cloth that came with them.
One of my pet peeves is dust in the moving parts, especially the eyecups. Cannot stand the grinding feeling.
Is it OK to blow them out with compressed air? Can the eyecups be oiled a little?
You should not wipe a lens without removing any dust and grit first.
Get one of those womans makeup brushes that have a sliding protective cover and use that first . MAC Makeup Brush MAC Brush 016
Flick any dust and grit away . most of it you will not even see. Then use lens cleaner a few drops on a clean cloth or patch , don't drop the cleaner directly on the lens. If you are using treated lens wipes then the liquid cleaner should not be necessary but the preliminary brushing is.
I don't like the idea of using compressed air as the speed of the air could blast grit against the glass but I guess with care and keep the pressure low and the nozzle far away from the glass it could work ok , you don't want any strong jet of air pushing grit into the lens seals or getting around the lens edge .
I have never found it necessary , just a good flick off with a makeup brush and then some optical lens cleaner on clean cloth works for me.
Don't use facial tissues as some have moisturising additives that make the lens greasy.
I would not put oil to near any lens.
Get a smaller slightly stiffer brush to clean out any threads.