The 105mm landscape polarising filter from lee is a slim circular glass filter specially designed for landscape photographers using wide angle lenses on full frame dslrs its sleek ultra thin design allows the use of wider lenses such as a 17mm and will also prevent any unwanted vignetting thats associated with filters that have a thicker frame the filter will remove potentially distracting reflections from non metallic surfaces and it features a subtle tint of warmth to help boost the col