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Old Jan 13, 2010, 12:07 PM   #1
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Default Lens Cleaning

While practicing with my new camera my sister's dog surprised me and left his wet nose print on the lense. It's a very obvious smear.

Is there any advice you can give about cleaning this? Would lense cleaner and a microfiber cloth be good enough to take care of it?
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Old Jan 13, 2010, 12:25 PM   #2
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In general. it takes a lot of dust, dirt, or nose moisture on a lens to degrade image quality. Lens cleaner and a microfiber cloth should do the trick, but so might a clean shirtsleeve.
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Old Jan 13, 2010, 3:23 PM   #3
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Originally Posted by TCav View Post
In general. it takes a lot of dust, dirt, or nose moisture on a lens to degrade image quality.
LOL! How true, how true!

I've always been a bit leery of lens cleaners as I once heard some can degrade the coatings manufacturers put on them. I have absolutely no idea if this is a very old "wive's tale" or if it applies to today's lens cleaners, but I've had no trouble with a little water (when needed) and a microfiber cloth.
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Old Jan 13, 2010, 5:33 PM   #4
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I also carry around a LensPen as well as a blower-bush, but when I sit down to clean lenses, I use distilled water and Q-Tips.
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Old Jan 14, 2010, 10:17 AM   #5
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I was worried about using a sleeve or just any cloth, I don't know how hardy the glass is to withstand any scratches... it also dried rather quickly as it is doggy snot so I think it will take more than a dry cloth. I'll give the cloth and some water a try, thanks!
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Old Jan 14, 2010, 11:22 AM   #6
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This is not advice, but a questions along these lines.... The drug store sells eye glass cleaners that are intended for one time use.

Each towelette is wet and is in a foil pouch. I have used these for years to clean my glasses and my computer screen. Would they be okay for emergency lens cleaning or even every day cleaning?

Faithfully yours,
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Old Jan 14, 2010, 11:48 AM   #7
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Just for sharing, you may want to read these 2 articles:
http://www.lensrentals.com/news/2008...ment-scratches
http://www.kurtmunger.com/dirty_lens_articleid35.html

It is quite astonishing to see the amount of abuse that lenses can take before image degradation. But I still wouldn't risk it and would take appropriate measures to protect my lenses by using a hood.

For cleaning, I have bought myself a Lenspen, Rocket air blower and a micro fibre cloth.
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Old Jan 14, 2010, 3:19 PM   #8
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... I'll give the cloth and some water a try, thanks!
Use clean water. Distilled water evaporates without a residue. Tap water can leave a residue that might be worse than dried doggy snot.
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Old Jan 14, 2010, 3:22 PM   #9
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This is not advice, but a questions along these lines.... The drug store sells eye glass cleaners that are intended for one time use.

Each towelette is wet and is in a foil pouch. I have used these for years to clean my glasses and my computer screen. Would they be okay for emergency lens cleaning or even every day cleaning?
In a pinch, yes.

Don't reuse them. Make multiple passes, each over a different area of the lens, and each with a different part of the tissue.
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Old Jan 14, 2010, 9:33 PM   #10
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I am not a big fan of these. Leave one out for a day or so to dry out, and then see what it feels like. The ones I have used are paper, and are not at all soft when dry. It is only the cleaning fluid (which is isopropyl alcohol) which makes them seem flexible. I much prefer a soft cloth, such as microfiber or a well-worn cotton T-shirt. Alcohol is good for greasy dirt from fingerprints. Fogging the lens with your breath before wiping with cloth is fine for most non-abrasive dirt.
Lens coatings on glass lenses are pretty hard, but can be scratched by sand or grit. Otherwise, don't worry about rubbing them (softly, with a double thickness of cloth) to clean. I have a couple nearly 40-year old lenses that are still optically perfect (or as much so as they were new).

brian

Quote:
Originally Posted by FaithfulPastor View Post
This is not advice, but a questions along these lines.... The drug store sells eye glass cleaners that are intended for one time use.

Each towelette is wet and is in a foil pouch. I have used these for years to clean my glasses and my computer screen. Would they be okay for emergency lens cleaning or even every day cleaning?

Faithfully yours,
FP
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