Filters for camera extensions?

Question

My husband says that I should buy filters for my camera that fits on the camera lens. But I want an extension telephoto lens. Should the filters go on the extension or before on the camera?

Answer 1

Filters always go on the end of the lens furthest from the camera. So the light goes through the filter before the lens element. You always need either a UV haze or a skylight 1A filter on your lens. These do not greatly effect the picture. The main thing they do is protect the lens from damage. Better to scratch a 15 dollar filter than a 700 dollar lens. Other than that most folks have a polarizer in thier collection. For digital AF you want a circular polarizer. I like tyhe cokin system for effect filters but there are many good filters out there  

Answer 2

The filters go on the end of the lens.  

UV or Clear is a common filter to have as they won't mess up your exposure and they will protect your lens.  Being careless one time I bashed my lens into a rock and cracked the filter real good.  However, that was a $40 filter and not the $600 lens.