Good special purpose lens - has some purple fringing issues
3 June 2012
Summary: The Fish-eye is an interesting lens. It gives you that neat fishbowl look to your pictures, which can be fun and also allow you to capture some really wide angle shots. For a non "limited' lens from Pentax - the build quality is very good. Focus ring is nice and smooth, metal mount and it comes with a nice aluminum lens cap and a decent lens bag. A couple of things to note: *You can't use a filter on this lens - just the nature of the beast.
Summary: I've gone sort of nuts buying Pentax lenses for my k5 and kx. I have the 10-17 Fisheye, 15mm Limited, 21mm Limited, 35 mm Macro Limited, 40 mm Limited, 70 mm Limited, 200mm DA*, 50mm Takumar m42 and just bought the 50mm f1.2 SMCA. I take a lot of events/street, flowers and nature shots. I find this to be my second or third most used lens which is saying a lot given that it is normally considered a niche lens. It's great to be able to capture the entire environment.
Summary: Advs: 1) My item was done very well, it's pleasure to hold this stuff, it looks great 2) AF and other neats Cons: 1) It's a zoom. From 10 fish eye to 17 wide angle. I have DA 15 ltd wide angle which completely outperforms this one in optical quality, so this only disturbs me without any profit. 2) It's quite expensive 3) It's optical quality is questionable compared to samyang 8mm.
Summary: The DA 10-17 is a special lens. It is not the sort of lens that you would use every day or, even as a "walk around" lens. At the same time, it provides a field of view that you have a hard time achieving with a rectilinear lens. The widest angle lens for APS-C that I know of is the Sigma 8-16mm, which only gets about 121 degrees of view into the photo -- at 10mm, the DA fisheye gets 180 degrees -- have to watch your feet or they will be there too.
Summary: Nicely crafted lens with smooth controls and built-in lens shade. Focal length appropriate for solid wide angle and mild fish eye perspectives. Focus is sharp and contrasty. If you are in the habit of adjusting focal length with your fingers on the barrel while you take the exposure, be aware that because this lens captures such a large field of view, you might get a great picture of your fingers as well as your subject.