Hank Radt wrote:
Hi all,
Have a new lens on order. The salesman has recommended a UV filter to protect the lens (at a not insignificant price...). I returned home and did some research, and have found that opinions vary. On the one hand, yes, filters protect the lenses. On the other, the filters themselves can become scratched or dirty and degrade image quality. (I could add more, but the opinions seem to fall largely into these two camps.
So, my question to the UHH community is, do you recommend using a filter or not? If so, what (apparently modern digital cameras have UV sensors in front of the screen, so a UV filter is largely redundant on these...)? If I'm going to buy one, I wouldn't want to put an inferior filter in front of good glass.
Thanks for your opinions.
Hi all, br br Have a new lens on order. The sales... (
show quote)
FWIW ...
Some people think that to offer a contrary observation to their POV is to merely offer an opinion ...
That is because they apparently cannot-or-have-not-been-able-to process the scope of the situation ...
As FULL DISCLOSURE, I will state that I will typically put a filter on the front of my lenses ... the exception is when I don't have one to attach!
Now, one reason is that I used to keep a filter on my lenses is because most of what I shot was what many refer to as
photojournalism ... so, the inconvenience of a lens cap exceeded its utility ... regardless, IMO, a shallow hood will not be much protection to the front element of a wide angle lens.
Of course, I presume that I am not the only individual who used to use a rangefinder camera who found it to be mildly annoying to find out that the lens cap was STILL ON THE LENS after presumably taking a picture.
Now, I will add that I have seen many other individual lenses (beginning with a used Sumarit) which I briefly had which probably never had a lens filter attached to it ... much to MY delight, the images of that un-coated lens (and, an un-coated Summar) were not impeded by the light "cleaning" scratches which they had acquired in the prior decades ...
I have also seen numerous lenses which OTHER people had which never had a filter on it whose coating was very badly degraded from cleaning ...
Those lenses surely were able to take reasonably good pics ...
BUT, the argument that the added layer of glass in front of the lens impedes IMAGE QUALITY is, IMO, specious because I'll bet dollars-to-donuts that the vast majority of the individuals who say they don't use a protective filter because the additional layer of glass is potentially degrading are blissfully using ZOOM lenses (a HUGE compromise even if there are better formulations with floating groups, IMO) which certainly have additional layers of "glass" instead of using a PRIME lens ...
Regardless of whether-or-not there is an advantage to having a sacrificial lens filter attached to a lens, the added (hopefully "clean") air-glass-air (with-or-without-dirt-or-light-scratches) surface in front of the lens will necessarily have LESS effect on the bending of the light than the additional "surfaces" which a Zoom lens will have within the lens barrel ...
If it matters, is it that much more difficult to unscrew a lens filter than to remove a lens cap?
Of course, when I do use a Zoom lens, I
know it is a huge compromise over using a quality Prime lens.
Do those who use Zoom lenses but decry the use of a lens filter know that they are compromising their Image Quality?
So, while it may be a cosmetic issue to have a lens with an unmarred front element, that's what I would prefer ...
And so, THAT's
my "opinion."
BTW. The filter tests performed by Roger Cicala (Olaf and Lensrentals) was very interesting ... he did not say whether they put a filter on their lenses, or if he recommends that the renter use one, or what the fee is if a lens is returned with a scratched front element.
I think his test would also have been EVEN MORE enlightening if he had included a few generic filters to show how good-or-bad they were when compared with the "major UV filters on the market."
It would also (?) have been interesting (at least to me) if Cicala had analyzed the Tiffen filters to see why they performed so poorly.
It is hard to believe that for the type of test (
i.e., "pinhole") which was being performed that a Step-Down ring couldn't have been used so that the Leica filter could be included in the data related to lens flare.