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Lens cleaning...or over cleaning.


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Just for the sake of discussion, I've heard that more lenses are ruined by over cleaning then not cleaning them enough (finger prints & oils excluded). I've had my M9 for about 3 months and haven't found the need to clean the first lens yet. How many clean their lens everytime they get ready to go out and shoot?

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Are you in Africa or a studio? Depending where i am, it differs dramatically. I am often in dirty old buildings (Architect), and yes, I have to clean my lenses/sensor fairly regularly (at which times I have a filter). Otherwise, rarely. It depends.....;)

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I never clean my lenses, but that's because I always keep a filter over them. I know that some purists say that one shouldn't be shooting through a filter, but I've never seen harm done to any of my pictures by them, and I'd rather be regularly wiping down a $30. piece of glass than a $3,000. piece.

 

- David

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I never clean my lenses, but that's because I always keep a filter over them. I know that some purists say that one shouldn't be shooting through a filter, but I've never seen harm done to any of my pictures by them, and I'd rather be regularly wiping down a $30. piece of glass than a $3,000. piece.

 

Hi David,

 

Have you experimented? I tried it on my Nikons, there was a significant difference at wide angles (24 and wider maybe), but nothing significant at longer lengths. I'm guessing it was more to do with veiling flare, and reflections, by the look of the difference it made.

 

Consequently I took filters off my wide lenses, and got a bit more paranoid, so you might not want to try it :)

 

I haven't repeated the experiment with my Leica lenses, but I don't use filters on them. They're either, old and cheap enough that I can afford not to, or I'm very careful. Thom Hogan claims that modern lens coatings are very tough, but that's not an experiment I want to do.

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For the occasional thumb print: a bit of breath vapor and a swirl with an old but clean piece of cotton, which is less abrasive than lens tissue

 

Like a corner of the t-shirt you may be wearing!

 

For prevention, change lenses with front cap on.

 

That said, I can't recall really needing to clean a lens - just air

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Out in the field I have to occasionally clean the filter of dust. For this

I keep a covered retractable soft bristle lens-brush which always works

unless the glass got smeared with something. Anything used for cleaning has

to be kept very very clean. Even the lens brush should be blown out occasionally

and washed!

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Lens tissue and alcohol. For stubborn oily stains, acetone and lens tissue. Non-scented toilet tissue in an emergency.

 

I have hundreds of lenses and have never damaged one by cleaning them whenever they need it.

 

No need for fetishism or fear of cleaning lenses.

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Dust is an airborne abrasive.

 

Any form of cleaning that involves rubbing it about on the lens surface can potentially cause problems ..... although you would have to be pretty habitual and rough to result in actual scratches that would degrade performance to any extent.

 

I'm not sure about the integrity of any coatings. I stripped off the coating on the lens of one of my older Nikon Coolpixes by inadvertently using butanol.... but there again a full glass of champagne had been poured into it which completely gummed up the works. (an everyday occurrence in our household ;))

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Lens tissue and alcohol. For stubborn oily stains, acetone and lens tissue. Non-scented toilet tissue in an emergency.

 

I have hundreds of lenses and have never damaged one by cleaning them whenever they need it.

 

No need for fetishism or fear of cleaning lenses.

Acetone? better be careful and sparing. It will dissolve lens cement causing separation of the front element if it gets between the barrel and the glass..

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I clean my lenses, when they show a necessity, to clean.

 

After a day of shooting, I use a blower bulb, to remove any dust from camera and lenses and have a short look at rear and front element.

 

I cannot remember, when I last time had to clean a rear element.

The last time, I cleaned a lens from the front must be a few weeks ago after using the lens in a drizzle.

 

Cleaning a lens every time after using sounds completely insane.

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I try to touch the front element as little as possible. What I do is clean the inside of the lens cap before I replace it back on the lens. The amount of lint/dust/crud the lens cap picks up when you just have it in your pocket! I try and avoid blowing the dust out of the lens cap with my mouth as this would introduce moisture.

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Air from Gillotos and perhaps a clean brush does it 95% of the time and I do it when I see dust build up. Sometimes I tear/fold a lens tissue and use it as a brush in the field.

 

More aggressive cleaning only when I see something. All lens cleaners leave something to be desired, so I use water on special cloth and resort to cleaner, then water again if necessary.

 

Realize a little dust will not degrade the picture, a fingerprint needs to be cleaned ASAP as the oil can degrade coatings.

 

Lens shades and caps are your friends.

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