Whats UV Filter For??
Where it is placed?
+1.
mhikzmhikz: welcome to the forum. Please fill in your profile. We use real names here, and your location will sometimes help people provide better information.
Since you are new here, and I think new to photography as well, I suggest you spend some time reading the excellent tutorials on this site. You'll often get more complete information that way, and it is more efficient than having folks rewrite the same things, usually in less detail. Then post specific questions here, and folks will be happy to add more information, or to debate about various options. In this specific case, there is a tutorial page specifically about filters: Newbie
The UV filter is the salesperson's bonus ... though I can understand why people use them considering the horrendous cost of DSLR lenses as a protection against knocks and cleaning. I prefer to keep a good lenshood in place 7/24 as protection so have not bought one in decades ... I also rarely clean my lenses as I keep them clean with care rather than cleaning .. a little bit of dirt hurts nobody or few photos. Only problem I have had that I can remember [ with sadness] was taking the camera out of its bag in a hot situation and condensation spoiling a sequence of photos due to the camera being cold from the air conditioned appartment I was staying in. A silly mistake on my part and not being used to living in such conditions in the States
Accidents happen. If I'm going to wack a $1000-2000 dollar lense against a tree or rock, I absolutely want several levels of protection- I put a UV filter on my new lense the first minute I get it out of the box, and never remove it again. I also keep a lense hood on as a 2nd level of defense. Admittedly, most of my shooting is outdoors and often in forests. If I were typically indoors in a protected environment, I might have a different approach.
The only time I rue this decision is when I go ultra-wide and get some vignetting. Well, that's what cropping is for.