Which lens should I use ?

We had a cancer patient paint a mural many years ago. Due to some construction I need to remove it. I want to take a photo of it and give the cancer unit a 16x20 framed photo of the artwork. It is 8w x 6h and I can get about 8 ft back from it to take the shot. Can't deside if I should use my 17-40 or the 24-105. Appreciate the advice. I am thinking the 17-40.

Probably the 17-40 as the 24-105 will have some vignetting on the wide end.

CHUCK A wrote in post #15735997
We had a cancer patient paint a mural many years ago. Due to some construction I need to remove it. I want to take a photo of it and give the cancer unit a 16x20 framed photo of the artwork. It is 8w x 6h and I can get about 8 ft back from it to take the shot. Can't deside if I should use my 17-40 or the 24-105. Appreciate the advice. I am thinking the 17-40.

You could step back, (if you have the room) and shoot a 6x6 grid (overlapping by 25% or more). Stitch the images together as a "panoramic" for a large file you could use to recreate the same size as the original mural (through the use of multiple prints).