What a great lenses. Wow! So many great pictures. Really in love. Money well spent.

I was wary of buying this lens, as a fisheye is quite a niche item. However, I am delighted. I also have the Pentax 12-24mm and at the same focal lengths it is just as good, though this is fisheye so looks a lot wider.

Consistent Output; Lightweight; Quick Focus; Sharp Focus

Expensive for the quality. At Lowest 10mm on the edges see lot of curvature / distortion. Not worth the 50k I paid for this.

It works well for what I want, a fisheye to wide angle zoom. Cuts down the number of lenes I absolutely must take with me. Solid feel, a good quality product. That said non-zoom lenses are better, but only just.

I love it! I'm still giving it 5 stars even though I have a few complaints. I use this for real estate photography. I had been reluctant to buy it because almost all reviews were about fisheye, fisheye, fisheye. However it is very workable for indoor use if given the chance.

v This strange lens offers the distorted view of a fisheye lens, with the convenience of a zoom lens. It offers a 180degree field of view, from corner to corner when set at 10mm and the equivalent of a 25.5mm lens on a 35mm camera, with lots of barrel distortion, at 17mm.

This is an excellent lens, perfect for multiple uses. It is perfect for landscape photography, live band photography and has displayed amazing results with nighttime photography. I've been using this on my K-5 alongside the 18-135mm lens and it has become my favourite lens yet!

I orginally wanted a wide angle and rented this lens since the wide angle was unavailable. The lens is a great fun lens and you can do a lot of creative shots. Great for night photography if you have a subject that has a lot of curvature.

I orginally wanted a wide angle and rented this lens since the wide angle was unavailable. The lens is a great fun lens and you can do a lot of creative shots. Great for night photography if you have a subject that has a lot of curvature.

"I would like to start by stating am a very amateur photographer. I have read many reviews about extra wide vs. fisheye lenses. I do not have an extra wide angle lens and so I relied on online reviews to make my choice.