I recently got a Canon 5D Mark 1 (Classic) and I am using the Canon EF 28:135 Lens that came with my Canon 40D. Using this lens I am getting black corners on all of my photos that I shoot. My Canon 50mm lens works perfectly as well as my EF 70:200 lens.
What's going on here? It is not an EF-S lens and it works perfectly on my 40D but not 5D.
