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05-04-2010, 06:08 AM   #1
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Anyone use a protective filer for their DA15mm?

Hi,
Ive recently bought me a DA15mm and am wondering if anyone here uses a protective filter on it?
I usually dont use one on my other lenses but theyre a DA40mm which doesnt really need one thanks to the unique hood and some cheap M lenses where im not too worried about a little knockage. Being a fairly expensive lens, having a decent amount of exposed glass and being used at close distances all worry me but im not sure if im ready to trade off the amazing optical quality of it.
So opinions please =)

Chris

05-04-2010, 07:20 AM   #2
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Hi, I think if you use a very good filter (not the cheap ones) it shouldn't compromise the optical quality all that much. In fact, you'd be hard pressed to notice any difference at all even at 100% magnification. However, there are situations where the light gets so complicated you might find a difference. On 90% of occasions, you should be just fine.
05-04-2010, 07:32 AM   #3
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I was bummed that sigma doesn't make their EX DG multi-coated filters in the 49mm you need for this lens, so I picked up the Hoya HMC 49mm multi-coated UV filter for it and it seems to work well.
05-04-2010, 09:37 AM   #4
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Using an old filter with the glass removed offers some protection from physical contact with the front element without the potential image degradation of a filter in front of the lens. Depending on the lens, there may or may not be slight vignetting.

H2

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