Sharpness:24-70L vs. 28-135, improved!

[ed2day]

You make the call!
My assetion that my 28-135 was sharper than my 24-70L was met with some derision in another thread. So I'll let the forum decide. Now I'm comparing just high frequency resolving power of the lenses here. The 24-70L is the superior lens in many ways. Note the barrel distortion of the 28-135 for instance. Pictures were taken on a Gitzo tripod with mirror lockup and remote shutter release. Flash was used for consistent exposure with 1/200 sync speed. Subject was lit with about 300W of close ambient lighting for focus. The charts are not true resolution charts per se, but printouts from a Canon i9900. So if you can see a difference here, you can see it in a print, at least if you're close enough.

28mm, both lenses wide open (24-70 at f/2.8, 28-135 at f/3.5).

Top: 28-135
Bottom: 24-70L

[ed2day]

I give up, too much detail is lost. They look pretty much the same now. I'll open a PBase account and try to repeat this with higher res images.

[jojohohanon]

Why not just post 100% crops of where you see the most difference?

In these, as you've also discovered, all we see are jpg artefacts.

You didn't say, so I'm hoping you're shooting RAW?

ifso just post the crops as pngs: as these are mostly b/w, that should compress pretty nicely

[ed2day]

Yeah, I shot RAW. You're right, I should crop a smaller area. The problem for me is there's no way I know of to preview attachments, so until I figure it out I think I've wasted enough bandwidth...not to mention people's time.

[ed2day]

Try one more time:

Top: 28-135
Bottom: 24-70L

mid upper left quadrant

[ed2day]

mid upper rt. quad:

[ed2day]

Think that's about as good as I'm going to get. Off to bed.