Originally posted by drewdlephone Just curious, why not compressed air? Thats actually what I have been using, in conjunction with a microfiber cloth, for keeping the glass clean. I've only used microfiber on them once (I somehow got a fingerprint dead center on my filter) and the rest of the time I just check for dust, and use the air can, albeit VERY lightly.
There is a theory that canned gas will jump out of its container and ruin whatever it touches. Anecdotes gleaned from the internet abound, but factual cases of damage are rare as gold plated hens teeth.
If you are talking real compressed air, be aware that air compressors build up humidity inside the tank which can spray out the line, and this is made worse if the compressor is an oil type.
I've used canned gas (Dust-Off, specifically) for some 35 years for routine dusting of the insides of cameras with no damage.
I am planning on buying a tank of nitrogen, ostensibly for tire maintenance on my vehicles, but I will likely run a line into the house as well with the intention of using it for camera maintenance.
As an aside, I just did some very extreme macro the other day (bellows and 100mm bellows lens). I didn't bother to blow off the K20 sensor first, and I also didn't see any dust on the sensor, which normally shows up very badly in macro work.
The dust removal on start up seems to do something for dust reduction.
Regarding filters, I wouldn't bother. I haven't used UV filters on lenses for 25 years, and have yet to damage the front of a lens.
I do NOT baby my equipment, either.
A few specks of dust doesn't have the potential to hurt your pictures as much as a filter does.
Personally, I think people get too hung up on keeping their lenses too clean, and that is when they start getting cleaning marks, which really do degrade image quality.