I decided to buy this lens for my FX format D750 instead of the 15mm Sigma fisheye, even though the Sigma is about one f-stop faster, because (a) an on-line review comparing the two lenses found that image quality was comparable--both produce very good images, especially at higher f-stop/smaller...

Very fast and precise automatic focus, sharp results also a really good construction and material.

Not to pile on, but maybe with repeated reviews on the lens cap falling off, Tamron will find a solution so I can protect my $500 glass! Otherwise, I love this lens.

I mainly use this lens for underwater photography. So far it has been great!

all what you need to capture a whaleshark swimming by

I bought this product a few weeks ago for use with my Canon 7D crop body camera which I use for shooting in-water surf photography. After reading all the previous reviews it seemed that this would be the best fit and it hasn't dissapointed.

I love this fisheye, especially for underwater wide angle. I originally had the version with the lens hood, but sold it to purchase this version, which i can use with my 5D2. It's amazing the field of view on a ff camera! This lens is sharp, produces beautiful images.

I have used this lens for 1 year on a Nikon D5200 now. Great lens For the D5200, it is strickly manual focus. I have recently upgraded my Nikon D5200 to a Nikon D7100; and low and behold, the auto-focusing feature works like a champ, it is lightnning fast.

Compared to a pro series canon fisheye -has a better MTF chart -less than half the price -minimal loss being 10-17 vs.canon 8-15 being a specialty lens for an active photographer, this hoodless version for my 6D's (and other full frame cameras)is perfect.

Nice lens, good light and good quality. Just one problem, and it really stupid, I dont understand how the miss it. The lens cap has nothing to attach to the lens rather than a very soft magnetic, nos swithm neither a slot for a grip. You have to be care because it will fell down easily