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Cleaning of very dirty lens
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PostPosted: Sun Jun 28, 2015 4:33 pm    Post subject: Cleaning of very dirty lens Reply with quote
Hello, what is the right way to clean this lens, especially the front lens:



PostPosted: Sun Jun 28, 2015 6:23 pm    Post subject: Reply with quote
I certainly wouldn't rub it until all the dirt has been removed from the surface. Personally, I would soak the surface of the lens with with a solvent, I would start with lens cleaning fluid and let it soak, then I would use a small artists paint brush soaked in fluid and gently work into the dirt. If lens fluid doesn't work then I would use alcohol \ lighter fluid.
But whatever I did I would use a very soft brush and use it gently. And lay the lens on its side so any liquid runs off the Len and not inside it.


PostPosted: Mon Jun 29, 2015 12:26 am    Post subject: Reply with quote
First of all, your lens doesn't look really dirty as much as it just looks dusty. So I would begin by blowing off as much of the dust as I could with a blower brush and then I'd use the brush to lightly brush away as much of the rest of the dust as I could.

I don't know if I'd go to all the care that Lloyd would. Most coatings are tough enough to take a little rubbing. But with a lens like this -- and I've occasionally had them this dusty before -- next, after blowing off as much of the dust as I could, I'd take a soft sponge, saturated with plain old tap water, and gentle begin to wipe away any stuck-on dust particles. I wouldn't hesitate to allow water from the sponge to dribble onto the lens and maybe soak for a bit. Water is the universal solvent, after all. And I'd continue to wipe lightly at it. I wouldn't try to get every last trace of dirt off the lens if it didn't want to come loose, but I wouldn't hesitate to scrub away at the body of the lens with the sponge. Next I'd use a lens tissue soaked in either lens cleaning fluid or alcohol on the lens's glass surfaces and see if that removed any further traces of contaminant. I'd also use a cotton swab soaked in alcohol to clean any tight spots on the body of the lens.


PostPosted: Mon Jun 29, 2015 1:29 pm    Post subject: Reply with quote
Blow the dust off first with a very soft puffer brush in case there's any grit.
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