Filter woes

mikeysaling

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michael
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I am one of those folk that like to use a filter on my lenses - this morning taking a shot of a light aircraft from the local airfield ; a naughty birdie dropped his business right on my lens hood , partly splashing the lens filter ! The hood was easy to clean but the filter when cleaned with lens cleaning fluid and lens tissues now displays a mottled effect when viewed with reflected light (viewed straight on looks clear) . Have I partly taken off the coating (its a hoya UV filter btw) or rubbed too hard. Any thoughts on this - should I get a new filter .

mikey
 
it sounds like whatever was in the bird has destroyed the filter coating, did you not rinse the filter first before wiping with the cleaner?

either way if you've tried usual practice and theres still marks......new filter time I would guess
 
Definitely sounds like the bomb the bird dropped has damaged the coating on the filter. The good news is that the filter's done its job and taken the hit on behalf of the lens.
 
Prior to lens cleaner I used a wet cleaning tissue to remove the splashes. Yes - time for a new filter and as stated - it did its job . the lens is a 24-70 2.8 nikkor !!!!!! Never even got that BIF picture .
 
Bird poo is not good! It can damage car paintwork if not cleaned promptly.

But a lot of protection filters will show permanent marks if even rain water is allowed to dry on them (not that I think it affects performance). The best filters for this are the top of range ones with tougher coatings, like Hoya HD, Marumi Super DHG, and B+W MRC.
 
I would have soaked the filter in water for a few min to easily wipe out the turd. They are quite basic too so might react with the coatings. Cormorants literally destroy whole forests when they settle down in colonies.
Anyway if you can't polish it off, time for a new filter. This one did just the right job there.
 
Personally I would normally remover the filter and wash it with soapy water then rinse thoroughly with clean running water. I would never used that kind of cleaner on filters.
 
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