This filter is not coated.

UV 2A rated filters are recommended for photographers who are going to be doing shoots at higher elevations such as mountains etc, where the UV Haze that is present in the atmosphere has a different level of effect than it does closer to sea level. Essentially at higher elevations there are greater amounts of UV light present which need to be filtered out for clearer images. They remove the bluish cast caused by UV light. In general there are no disadvantages to this filter.

This filter will fit any lens with a 95mm coarse filter thread.

Hi Aquiles,According to Tiffen, the 2A absorbs all ultraviolet light, whereas the 1 absorbs only 71% of UV. Film and sensors detect UV as additional brightness in subjects like the sky even though our eyes don't, so a UV filter renders photos that are closer to what we perceive. I think you will see slightly richer colors overall with the 2A, but the 1 would make a noticeable improvement.You won't be able to see a difference by just looking through the filter because our eyes naturally filter out the UV.If the extra cost bugs you, go with the Type 1. It will improve your photos as compared with no filter. If you want to get the bluest sky, the Type 2A is better. Incidentally, a polarizing filter can do an even better job of darkening the blue in the sky.Jim

It should not at 24mm. The determining factors are the body you are shooting (full frame or cropped sensor). Full frame cameras are more likely to have vignetting issues. There are so many camera & lens combinations it is impossible for us to test with all of them. If you want to be sure, you can purchase item # 77WIDHZE, which has lower profile rings to avoid vignetting:https://<a href= http://www.bhphotovideo.com/c/product/163477-REG/Tiffen_77WIDHZE_77mm_UV_Haze_1_Wide.html target= _blank >www.bhphotovideo.com/c/product/163477-REG/Tiffen_77WIDHZE_77mm_UV_Haze_1_Wide.html</a>