looking for a new fisheye and need some advice

ok, guys iv had my 40d for a while now and think its about time to get a new toy, i quite fancy a fisheye as i shoot a lot of bmxing/ downhill mountainbiking and landscape night photography.
not quite sure how 'fishy' to go though, anyone got examples from a similar camera so i can compare...

main contenders are the 15mm 2.8 sigma and the 8mm, though i have a feeling that it might be to fishy...

cheers and any help and examples much appreciated

On a crop body like yours, the 15mm will not give you alot of the fisheye effect...

Your better getting the 8mm, or even the Peleng 8mm manual focus lens.

tokina 10-17

Sigma 10 2.8

Tokina 10-17mm or Peleng 8mm.

I own a Peleng 8mm and its one of my favorite lenses. I NEVER leave home without it in my bag. The only times its not with me is when I'm shooting with just one lens that day and leave everything else at home (those days its usually a prime normal lens).

The Peleng is an amazing lens, which is incredibly sharp with good colors and contrast (as long as you try to not shoot into the sun which produces lens flares - one of the Peleng's main trouble areas). Check my PBase to see a sample of a series of shots taken with the Peleng. The HDR of Yankee Stadium was taken with the Peleng handheld.

Also if you check my flickr theres some shots in my favorites set taken with the Peleng on the day I got it (litterally 20 minutes after opening the box), the shot of my friend James scarfing down the burger is one of my faves.

The Tokina 10-17mm gives you zooming which is a very interesting feature for a FishEye and is in fact a first. For a full-frame fisheye thats the one I'd get.

nureality wrote in post #7533114
The Tokina 10-17mm gives you zooming which is a very interesting feature for a FishEye and is in fact a first. For a full-frame fisheye thats the one I'd get.

I don't think I would buy the 10-17 for FF - see http://www.360pano.de/​en/tokina-sigma-nikon.html for examples of image on FF. That said, if I were the OP I would certainly consider it for 40D - it looks great.

The 10-17mm isn't meant for FF, neither is the Sigma 10. These are crop lenses. And unlike the Tokina 11-16 UWA which is usable @ 12.5 or 13mm. The Toki Fish is gonna vignette way too much to be usable on FF in any kind of way. I would not consider getting a lens "shaved" under ANY circumstance.

The Toki is a GREAT lens, not just a GOOD lens. And for a crop body is probably the best option in terms of versatility and IQ. The Sigma has the IQ edge @ 10mm but you would expect that - its a prime.