Originally posted by rparmar 1. UV filters do indeed show degradation. This has been measured many times. Do some research. Or just think for yourself. "Hmmm, I am adding a new layer of glass the lens designer never counted on, two new surfaces for reflections and a new air gap the lens designer never anticipated. I bet that does nothing at all!"
Nope, none perceptible at all. I checked thoroughly using my FA 31mm Ltd back when I first got it. The Hoya HD UV filter introduced no loss of contrast or resolution. In some very rare circumstances, there was a slight amount of added flare from things like street lights at night.
This is in stark contrast to the garbage base Tiffen filter I tried on there initially. That one made everything soft.
Originally posted by rparmar 2. If a filter smashes it might scratch the front element worse than if it wasn't there. This too has happened. Filters get jammed on lenses. Many filters get scratched easier than the actual lens coating. Likewise for fingerprints.
I said high-end filter, not trashy stuff from WalMart. High end filters use hardened glass that is often harder than the front element of a lens. And they use a coating which is just as scratch resistant as Pentax SMC and SPC. Hoya filters are a bit tougher to clean, but B+W filters are actually dead easy to clean, even moreso than the front lens element itself.
Originally posted by rparmar People using a filter might be less likely to use a hood, thus compromising IQ and lens safety even further.
That's a baseless generalization. And hoods aren't intended as "protection" anyways.
Originally posted by rparmar 4. Care taken in inclement weather protects the lens from most threats. No-one ever suggested being rash.
oh is that what you meant by "
I've taken lenses into salt-water spray etc. No big deal."? I must've misunderstood. Please enlighten me, where was this "care" you refer to in that statement?
Originally posted by rparmar 5. If the situation is extreme you won't be pulling out the camera to shoot anyway, so hood or not it doesn't matter.
You realize of course that those are exactly the situations where great picture opportunities present themselves, right?
Originally posted by rparmar 6. An "ultra-high quality" filter, say the Heliopan SH-PMC Slim 49mm is $146 at B&H. Hardly a negligible amount.
I'm not terribly impressed with that filter. When I tried it out, it offered no better performance than a B+W MRC or a Hoya S-HMC. Not worth the money at all.
A 49mm B+W MRC UV filter is $38.50 at Adorama. A brand new 58mm Hoya HD UV filter on eBay can be found for $43. Perhaps you need to learn how to comparison-shop a little more. Your example is ridiculous.
Originally posted by rparmar 7. Finally, recall that we are talking about the FA43 Limited. It has a very solid hood and a small front element that is hard to reach.
Very true, but I still see nothing wrong with putting a UV filter on it occasionally when conditions warrant. And when that happens, I'd rather have a high quality UV filter handy than nothing at all.
Originally posted by rparmar Buying a high quality lens and then compromising it with a UV filter is naff. If you absolutely have to be using the best lenses in the worst situations then I imagine you are a professional and can budget for replacements.
That's quite the leap of logic. I see these nonsense statements made frequently in this forum. I have a couple of professions, and in each one, I don't needlessly subject my tools to potential harm. Especially if there's a cheap and readily-available way to minimize the chance of damage.