Suggestions for wide angle lens

I am looking to but a wide angle lens for my canon 5d mark II camera, the old lens i have puts a circle around the image if that makes sense. Any ideas on what to get? Thanks in advance

How wide? Zoom or prime? Fishy or not? And in what cost range?

A nice reasonable cost zoom is the 17-40. A wider, very expensive prime is the Canon 14mm f/2.8. There are other options in between. Check out the table of lenses sticky, it lists out all the lenses available.
https://photography-on-the.net/forum/showthre​ad.php?t=257659

thanks, will check that out now. The lowest i have now is a 24 prime lens, i just want to go a little wider and not to fishy

Doemasters wrote in post #12481931
thanks, will check that out now. The lowest i have now is a 24 prime lens, i just want to go a little wider and not to fishy

The Rokinon/Vivitar/Bower 14mm manufactured by Samyang is a lens that will give you what you're looking for ... at a price under $400. Check out the lens image section.