super sharp and fast macro lens. Works well on both FX and DX cameras. You need to shoot at F16 plus to get any depth of field so make sure your chip is free of dust. Try using it for fish portraits as well as pure macro as this gives very pleasing results.
If you want people to think you are capable of taking great underwater photos,....use this lens. It is sharp, perfectly contrasty and allows you to approach many subjects without scaring them away.