Reader's Comments - Index of - Free

Cleaning Cameras
up so much dirt before it is saturated (remember chemistry class?), and more wiping just
moves the dirt around, instead of dissolving it.
Lastly, someone above mentioned that looking at your lens with a bright light will reveal
any dirt and dust. That's just how it's done in the optics world. Just a word of caution
though: even a brand new, freshly opened lens may show "a lot" of "imperfections" under a
good bright light. I suppose only someone who is trained in inspecting optics can really tell
what's normal and what isn't, but anyone can look for grossly wrong things. There should
be essentially *no* smudges or other things which cover a large area on the lens. Most
acceptable imperfections will be just little point-sized things. If you can count the dust
particles on your lens, you're in good shape. If there are so many that you could never
count them all, then you probably need a good cleaning.
Hope this helps. Brian
-- Brian McNeil, March 6, 2002
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Related Links
● Gemological Institute of America- At this site, follow the links to their on-line catalog of products
(GEM Instruments). If interested, you can purchase a 10X triplet eye loupe from them.
(contributed by Marika Buchberger)
● Kooter's Geology Tools- Kooter's Geology Tools carries the Bausch and Lomb Hastings Triplet
hand lens in 7X to 20X for $32-39. Stainless steel and black impact plastic. It should last a
lifetime. (contributed by Mark Ingleright)
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