need help with wide angle lenses

[eheath]

So i have a redrock m2 35mm adapter, not a 7D but this forum seems to get alot more traffic than the 35mm adapter forum.

My main problem is that im looking for a wide angle lens (28mm or less) that has a large rear element, because ive tried a couple different lenses (20mm and 28mm) and get intense vignette because their rear elements are very small.

I'm looking into a 24mm 2.8, rear element seems wide enough from pictures, but thats a risk and its 100+ dollars

Other options are samyang 18-28 4-4.5, sigma 21-35 3.5-4.2, nikon 28-85 3.5-4.5 and vivitar 24-70 3.8-4.8 all of these are under 60-70 bucks.

any opinions? could use as much help as possible, thanks

 

[steventimothy]

Which 24mm 2.8 fixed are you looking at? That's bound to have better optics than a zoom, and is worth the extra $50-75 IMO. You can usually move the camera closer or farther away in that range of lens

 

[eheath]

Which 24mm 2.8 fixed are you looking at? That's bound to have better optics than a zoom, and is worth the extra $50-75 IMO. You can usually move the camera closer or farther away in that range of lens

the 24mm 2.8 is nikon, so yeah really legit.

Its not the zoom im exactly wanting, im just wanting more of a budget wide angle that wont give me and vignetting, and the zooms tend to have much larger rear elements than the fixed lenses. If anybody knows anything about the lenses i listed, thatd be great.