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uv or clear glass filter for sigma 30mm f 1.4?
Assuming I'd like to get one, which is recommended to keep stuff off lens shooting primarily at wide apertures at dawn and dusk?Hank..

Comments (8)

Well, clear glass won't do anything. Most digital cameras are not effected by UV light, so a UV filter won't help either..

At dusk or dawn you might carry a graduated neutral density filter along, to stop down the sky and bring out the darker ground. Just a thought..

Be careful, though, because filters can increase flare and lower contrast, especially when the sun is low on the horizon..

For more about filters, you might want to read this, Filters 101.

Http://www.bythom.com/filters.htm.

Cheers, Craig..

Comment #1

Thanks, Craig, for the info on filters and the advice on ND. Regarding clear glass, won't it keep dust and fingers off my lens? Of course. But is that worthwhile and a worthwhile way to do it?thanksHank..

Comment #2

Yes it will keep fingerprints off the lens, but that's the big debate on photo sites. You have the crowd that puts a filter on each lens for protection and the crowd that thinks that's a bad idea. I'm of the latter..

I don't want to reduce the contrast and allow more flare on my expensive lens when I can occasionally clean it with a lens cloth..

Cheers, Craig..

Comment #3

Digital cameras are prone to internal light reflecting off the sensor (OK, the filter over the sensor, for the pedants) and then bouncing it around inside the lens. Adding a filter only adds another layer of potentially reflective glass to the equation. Not to mention the possible image degradation from a less-than-stellar filter..

If you're worried about fingerprints, don't touch the lens (you CAN restrain yourself, can't you? [jk, OK?]). Dust will blow off with a Rocket blower, rain wipes away, as does snow etc. The only big demon is salt water, which CAN be difficult if not removed before it evaporates - if you plan on shooting near the bounding main, something in front won't hurt, but make sure you really need it, for all the reasons you'll read in this thread..

Rob.

Everyone, everywhere, has to do everything for a first time. There is no shame in failure, only in failure to try...

Comment #4

...it saved me lots of time, money and disappointment. I think that I'll begin my filter acquisition with what you recommended: a graduated neutral density filter at 2-stop soft and 3-stop hard.kokopuffs..

Comment #5

I got one small smudge on a lens. I believe it was a droplet of tree sap. I had a really tough time getting it off. It took a lot of rubbing with several applications of lens cleaner. That was enough to convince me to use a coated UV filter for protection. I did a lot of pixel peeping and could not see any image degradation.

It is no wonder that a single piece of optical coated glass cannot be detected...

Comment #6

But why did you get a uv filter instead of a clear piece of glass? b + w makes clear glass..

Comment #7

In what way(s) do clear glass and uv protective glass function differently in front of the lens?..

Comment #8

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