Similar to a standard portrait lens like the 85mm f/1.8, Canon's 100mm f/2 is also an exceptionally bright and short telephoto lens appropriate for both general photography and portraits. Some portrait photographers feel that 85mm doesn't give you quite enough of what you need in a portrait lens and they prefer the 100mm focal length as it provides just a bit more compression. Again, as with the 85mm, the wide f/2 aperture setting allows for a paper thin depth of field. That's a really good thing when shooting portraits. Lens Hood - EW-60 Dimensions - 2.6 x 1.9 inch / Weight - 10.5 oz