fisheye lenses

It is true that I have the 7d and no particular plan to change my body at this point. In the near future I plan to widen my selection of lenses and one of them was to be a fun lens...just for the 50 shots per year or so....something like that. I am not 100% sure however that I want a fisheye like this without a ff. Maybe I will just wait... I haven't made up my mind. ..bur y'all have been super helpful

I actually keep my 8-15L on my SL1 most of the time and works great as a full-frame fisheye. However, it essentially is an UWA with lots of distortion.

It's actually pretty cool to see LightRoom correct the distortion on one of the images taken with the fisheye. It does an amazing job.

I don't disagree, if you don't need/want circular FE, then a less expensive FE should be just fine on a crop sensor.

...so there's a switch on the lens itself to focus at infinity? like the ones for canon 70-200mm? little confused...:o

Job511 wrote in post #16732530
...so there's a switch on the lens itself to focus at infinity? like the ones for canon 70-200mm? little confused...:o

No switch. Just a manual focus ring. Like focusing on any other lens.

If you want a "circular" look, Samyang 8mm can also do it (just make a circular crop!). It is a fun lens, with a unique stereographic projection (no other lens does that) - preserves shapes of small objects (like, people faces - see the example below) even at the frame edge - great for crowd shots.

IMAGE LINK: http://www.flickr.com/​photos/syamastro/84712​47846/

taxman, how far down from 15 can you go and still maintain full sensor coverage both on FF and crop

Bianchi wrote in post #16734405
taxman, how far down from 15 can you go and still maintain full sensor coverage both on FF and crop

On a full-frame sensor, the lens can only go to about 12mm before you start seeing some strong vignetting. Below that, the circle starts to close pretty quickly.

On a crop sensor (APS-C, 1.6x), the lens can go to about 9mm before you see the barrel, but there's a limiter switch that stops it at about 10mm - I assume to also accommodate for APS-H (1.3x) sensors. Therefore, if you want to use only full-frame fisheye on a crop sensor body, just hit the limiter switch and you can go from 10-15mm and never have any vignette.