Canon 5D Black Corners on Photos

[JasonR]

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.

[Waddizzle]

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@JasonR wrote:

@Waddizzle, are you suggesting there is something wrong with the lens?

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"That lens hood is probably the problem.  As advised, stop using it."

Negative.  I am pointing the blame at the lens hood.