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Needing to get really wide?
Aside from cost,this lens is something I’d really like to have in my bag. Always been a bit of a sucker for fisheye images, and the ability to zoom would be a plus. But at about $1,500 it’s a little much.
For a full frame camera this lens will cover 180° and a bit less on an APS-C digital sensor.
If you don’t have a fast 50mm lens in your bag, you need one. I’ve got an earlier model of this lens and it never leaves my camera bag. It’s such a small and light lens, and the fast f/1.8 speed makes it the go to lens for really low light.
The other side is I’m a zoom lens guy so it doesn’t get as much use as my Sigma 24-70, but when this little guy is needed it’s needed.
There is a more expensive f/1.4 version of this lens. Never tried it personally, but I’ve also never had a need for a faster lens than f/1.8. Unless it’s just crazy dark I’ve never shot wide open at f/1.8 anyway except to try it out when I first got the lens. The speed at which it focuses is very nice though.
Released earlier this month, The Nikon AF-S DX Micro 40mm f/2.8 is a lens for DX formatted Nikon dSLRs that allow you to get up close and personal with your subject.
As a micro lens you will be able to focus up to 16cm (~ 6. inches) and the short depth of field possible with an f/2.8 lens will allow to you easily control the blur around your image. A Silent Wave Motor (SWM) gives you quiet autofocus to limit disturbances to any small animals and insects you may be photographing.