19 ianuarie 2017

Why you should not use UV filters as protection on telephoto lenses

Just over a year ago, I bought the Canon EF 100-400mm f/4.5-5.6L IS USM II for my Canon 5D III and fitted it with a UV filter from the first day.

I've always been in the habit of putting UV filters on my wide lenses just for protection. When you go to a camera store to buy a new lens, the salesman tries to convince you to buy a UV filter because "UV filter protects the lens from scratches".

For telephoto lenses such as Canon EF 100-400mm f/4.5-5.6L IS USM II, it seems to be a different story and I've learned it from my first wildlife tours. UV filter cuts down the sharpness and contrast of the image.

left: with UV filter // right: without filter

Also, it delivers an unpleasant bokeh like in the picture below:

.jpf from the camera (Canon EF 100-400mm f/4.5-5.6L IS USM II + Kenko UV filter)
The difference in image quality between images taken without a UV filter and images taken with a UV filter can sometimes be drastic.

Below images taken with Canon EF 100-400mm f/4.5-5.6L IS USM II without an UV filter:

So next time a salesman tries to sell you a UV filter, save your money and just use your lens hood to protect the front element of your lens.

Locația: Bucharest, Romania

1 comentarii:

Sean PhotoGuy spunea...

My advice is to use multicoated clear glass filters as opposed to UV filters. Prefferably by Hoya or B&W. UV filtration isn't really needed for telephoto lenses.