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Does Leica and Alcohol Mix?


darylgo

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The best lens cleaner I could find contains alcohol, recently I have been using isopropyl alcohol straight, first 70% but it left a removable residue, then 91% with minimal residue and now 99.53%, no residue and it may not need a dry wipe. Are there any contraindications to using this on lenses or a camera body such as an M9? Are there better cleaners available?

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Pure IPA (spectroscopic grade, 99+) is about the best safe cleaner you can get, also for the sensor. At least this is what I use (OK, this is not necessarily a recommendation).

 

For optics stuff at work (i.e.things of value that I did not pay for directly) I use chloroform. Use this at your own peril. In fact do not use it at all unless you really want to take a risk. Still it is a remarkable cleaning agent, nearly free of residue, high wetting angle (it de-wets spontaneously).

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I like the mix of alcohol and Leica :D

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I'm with Andy on this one . . . but a clean t-shirt is pretty good as well.

 

Jono, if your T-shirt is clean, your not working hard enough! ;)

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This is better than lens testing but in back-to-back tests I can't tell the difference between alcohol and fresh breath. But breathing on the lens, one way or another, is the best way to clean it, I would never use a cleaning liquid. For the very rare sticky spot I use a LensPen.

 

Steve

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I too breath on the lens then wipe with a lint free lens cloth, but I still wonder about natural bacteria or whatever that may transfer from this technique. Logic tells me that a purpose designed fluid must be better. :confused:

 

Problem is, I never have one with me when I need it.

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For really stubborn marks on lenses I use ROR...

 

ror lens cleaner - Google Search

 

I bought a bottle in the 90s and it's still almost full. Normally breath and a microfibre cleaning cloth works fine.

 

Never spray the liquid onto the glass directly, always onto the cloth first, then wipe the lens with the damp cloth.

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I use RoR once in a blue moon - only if I have some sort of smear on a lens element such as

an inadvertant finger touch due to a lens handling miscue. If fogging the lens with warm breath then using a microfiber lens cleaning cloth doesn't do the job, it's time to go to the RoR.

 

The only cleaning I usually need to do is to remove dust particles. I use a can of photographic compressed air for this or a clean horse hair lens brush.

 

It is important to limit lens cleaning as much as possible. I have seen lenses that were owned by obsessive lens cleaners that have had the lens coating rubbed off as a result of lens cleaning overkill.

 

When you work in a camera store for awhile, you find yourself amazed by the myriad of innovative ways people will devise to bugger up a perfectly good camera or lens. :rolleyes:

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