So I bought a couple lens recently (17-40mm and 24-105) and want to get some UV filters for them.
Is there any real difference between various filters?
For instance, Hoya UV filters range from $30 to to $110. My gut reaction is that it is mostly marketing junk and the $30 one is fine. But would appreciate anyone with knowledge or thoughts to the contrary! Thanks.
There is most definitely a difference between various quality filters. B+W and Hoya multicoated filters are generally regarded as the best options. (I have B+W filters on nearly all my lenses, though I have seen tests where the Hoyas have been ranked slightly better for clarity/light passing - though it's probably imperceptible between those two options at the high end). Cheap filters like Tiffen, however, may create noticeable difference in your photos vs. none, so I'd avoid those for your everyday filters.
It is true that you do not really need the UV protection with a DSLR, though I've found the UV filters to be less expensive than their clear glass counterparts. Perhaps if I were working in a studio I would side with the purists who don't use any, but I'm too nervous about scratching the lens itself to go without one for protection.
I have a B+W MRC UV (regular, not slim) on my 17-40 and haven't noticed any issues with it.