Irix 15 mm f/2.4 Firefly Nikon

It's a nice lens, and it takes nice pictures, now. But when it arrived the focus was super out of calibration, and the manual is really unclear how the focus calibration works. If anyone's trying to calibrate it; you need a lot of movement to have any affect in the ring (like more than a quarter turn, mine needed almost a full turn to calibrate). It's nice that you can calibrate the focus, but it would be nicer if it came calibrated from the manufacture.

I liked but in the end of the day I may would choose the 11mm version. Or both I think LOL

Build quality is superb. Smooth focus with clicks in at infinity. Very sharp lens out to the corners. Distortion is very well controlled. Little bit of vignetting but not bad. Easily fixable in post processing, if necessary. Very easy to use, for most my shots I set it on at infinity and set the aperture more than f5.6 to get every things in focus.

Delivered promptly and Top quality, well worth the price

Wow. Super sharp. Focus works great. Great for landscapes and indoor rooms.