Sigma lens and UV filter
Sure, it is possible, but not likely. For a definitive answer, the next time you are shooting outdoors, remove the filter first and see how the camera responds.
Many will argue for and against the use of a UV filter on a lens. Personally, if shooting conditions warrant it (ocean spray, wind, sand, fingerprints), then I say use one. Otherwise, I leave it off.
|Stormin by PinoC|
from Best Picture Period!
|Oxbow Bend by stickpointed|
from Landscape - Colour #1
|India Ladakh Bond 2014 DP by MarioSS|
|Time for Reflection by JTF MKE|
from #7: Inspiration
|Two Rocks, Kissing by upuaut|