rule of thumb - the longer the focal length the less are the effects of scratches on the front lens. ultrawide likes of 35mm and smaller are very sensitive to m

rule of thumb - the longer the focal length the less are the effects of scratches on the front lens. ultrawide likes of 35mm and smaller are very sensitive to material on the front glass element. this translates into some really nice savings if you want to get a lens in 90mm+ range for example if there is a scratch on the front lens.