Methodology for a 24mm vs 24mm vs 24mm test?

Currently I have in my possession 3 lenses that can do 24mm focal length and I was thinking about doing a comparison while I have them all.

16-35 2.8L II
24-105 4L IS
24 TS-E 3.5L II

Any suggestions as to how to go about this? I have a 5DII. Just point all 3 lenses at the same subject and shoot away? Any other non-obvious considerations?

-K

My hypothesis would put them in this order for sharpness: TS-E / 16-35 / 24-105

No need for a test, the 24 TS will spank them all in sharpness and distortion control.

kurt765 wrote in post #10534603
Currently I have in my possession 3 lenses that can do 24mm focal length and I was thinking about doing a comparison while I have them all.

16-35 2.8L II
24-105 4L IS
24 TS-E 3.5L II

Any suggestions as to how to go about this? I have a 5DII. Just point all 3 lenses at the same subject and shoot away? Any other non-obvious considerations?

There are two facts that you should understand.

First, the focal length markings on the lenses are not necessarily dead accurate. Lens manufacturers tend to round out published focal lengths. In addition, the focal length markings on zoom lenses are only approximate.

Secondly, the advertised or marked focal lengths are as right as they get ONLY when the lens is focused at infinity. If you focus closer, the field (angle) of view with two different model lenses marked as being the same focal length could be right on with each other while focused at infinity but noticeably different when focused significantly closer.

The best way to ensure that all lenses are at the same focal length is to notate check points at the corners of your test shots with the fixed focal length lens and tweak the zoom lenses to match the framing.