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24 mega test
  
 
kevindar
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p.1 #1 · p.1 #1 · 24 mega test


Ok. so here are the lenses
Canon 24-105, canon 24-70 2.8 II, canon 24-70 f4, 24LII, 24 TSE II, 16-35 II, 16-35 f4, and tamron 24-70. 8 lenses in total. i could not get PS to tile 8 images, so I excluded the tamron and 24-70f4, since those may be least interesting.
All images shot on tripod. focus is on fire hydran across the street, 10x live view focus. I should have done a couple of shots for the tse, since that one was manual. remote shutter used. I am sorry for the large images. its to complicated for me to resize windows
Light was changing, so exposures may be different. I did remove CA. everything else is LR default. shot raw, exported as tif to ps, screen capture with microsoft snip it.

some observation. the 16-35 II, has field curvature with much better near filed than far field sharpness in the corners. I have always known that. It acutally works ok, since interesting foreground stuff are sharper and more in focus
Let me know if you want more info or any suggestions.

first the scene. again focus is on the fire hydrant across the street
flickr-8 by kevindar, on Flickr

24 2.8. only 4 candidates here, the two 24-70 2.8, 16 35 2.8, and 24 1.4
Right edge, mid frame
right mid edge, 2_8 by kevindar, on Flickr

Right top corner
to right 2-8 by kevindar, on Flickr

right bottom corner
bottom right 2-8 by kevindar, on Flickr


Edited on Aug 23, 2014 at 12:08 AM · View previous versions



Aug 23, 2014 at 12:03 AM
kevindar
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p.1 #2 · p.1 #2 · 24 mega test


next f4

f4 right mid by kevindar, on Flickr

f4 top corner by kevindar, on Flickr

f4 bottome right by kevindar, on Flickr



Aug 23, 2014 at 12:06 AM
kevindar
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p.1 #3 · p.1 #3 · 24 mega test


and f8

f8 right mid by kevindar, on Flickr

f8 top corner by kevindar, on Flickr

f8 bottom corner by kevindar, on Flickr



Aug 23, 2014 at 12:07 AM
kevindar
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p.1 #4 · p.1 #4 · 24 mega test


I will also try to do comp crops at 35mm, as well as full 16-35 2.8 vs f4 crops at 16-18-21-24-28-35


Aug 23, 2014 at 12:14 AM
canon pants
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p.1 #5 · p.1 #5 · 24 mega test


Wow, looks like a lot of work! Thank you for sharing. I am surprised the ts didnt do better.


Aug 23, 2014 at 12:36 AM
kevindar
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p.1 #6 · p.1 #6 · 24 mega test


yup, me too. I should have done more than one shot with the TS, as I was using manual focus. In addition, I would tell you that from f5.6 on, if you look at the entire image, the TS has the best over all performance.


Aug 23, 2014 at 12:37 AM
Paul Mo
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p.1 #7 · p.1 #7 · 24 mega test


No EF 24mm f2.8 IS? Please reshoot this afternoon. Thanks/


Aug 23, 2014 at 12:40 AM
jcolwell
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p.1 #8 · p.1 #8 · 24 mega test


Hi Kevin. Thanks for doing all of these tests and sharing your results with us.

The zooms show about what I'd expect, with the 24-70/2.8L II leading the pack. I don't hesitate to use my L zooms over their entire range, but I usually shift up to the next longer one, when I'm using focal lengths in that range. I often have two of them mounted at the same time, on two cameras. For example, I'll use the 16-35/4L IS right up to 35mm if my other one is the 70-200/2.8L IS II, but I'll switch over to the 24-70/2.8L II, as I get to 24mm on the wider zoom, if the 24-70/2.8L II is also mounted.

OTOH, I'd expect that your TS-E 24/3.5 L II should be slightly better than the 24-70/2./8L II, not noticeably worse, as yours shows in these tests. Maybe it had some slight movements set. Does it show about the same (lack of) sharpness in other parts of the images? If it does, then you should think about sending it in for an attitude adjustment - it should be better.



Aug 23, 2014 at 12:57 AM
kevindar
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p.1 #9 · p.1 #9 · 24 mega test


I will post a couple of other location shots of it. I really should have refocused the lens and reshot.



Aug 23, 2014 at 01:24 AM
Paul Mo
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p.1 #10 · p.1 #10 · 24 mega test


jcolwell wrote:
Hi Kevin. Thanks for doing all of these testsIf it does, then you should think about sending it in for an attitude adjustment - it should be better.


Is that service for lenses only or do they do FM members too?



Aug 23, 2014 at 01:45 AM
 

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skibum5
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p.1 #11 · p.1 #11 · 24 mega test


kevindar wrote:
I will post a couple of other location shots of it. I really should have refocused the lens and reshot.


yeah something seems to be wrong, how can the 24-105 beat the 24 T&S?

this test is very tricky as I found out, a smidgeon of change in AF and you can no longer compare the same spot in the frame to the same spot fairly, it was driving me crazy to get things fairly matched between lenses



Aug 23, 2014 at 01:49 AM
UCSB
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p.1 #12 · p.1 #12 · 24 mega test


Thanks for posting ... very helpful because you covered all of my 24's except my 24 2.8 IS. I'm always confident shooting 24 on the 24-70 II because of the great results.


Aug 23, 2014 at 08:07 AM
Bones74
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p.1 #13 · p.1 #13 · 24 mega test


Wow, thanks for taking the time to do this. Very interesting My 24-70 ii always gives excellent results right across the frame for landscapes. I found the 16-35 ii to be so poor at 16mm in the extremes that I only ever used it from around 20mm. In the end I just sold it, my 24-105 and 35L and replaced them with the 24-70 ii. While I do miss having UWA, IS and f/1.4 I got used to it.


Aug 23, 2014 at 09:48 AM
RustyBug
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p.1 #14 · p.1 #14 · 24 mega test


Thanks for the test, very informative.

skibum5 wrote:
yeah something seems to be wrong, how can the 24-105 beat the 24 T&S?



Did you look at the brick work shots ... the 24 T&S is all over the 24-105. The larger image circle projection of the TS-E (and the angles to the long edges) can yield a slightly lower contrast as you get farther out, or maybe we are seeing there is a very slight diff in focus over distance.

A bit more thought to the matter could be that or the 24-105 has some field curvature that is working toward the more distant edges. Having some well designed field curvature can help, but since the TS-E is designed for movement, it needs to be very flat because you would NOT want to be shifting/tilting field curvature all over your frame for architectural work, etc.

I'm going with the FC variance by design.



Aug 23, 2014 at 01:59 PM
kevindar
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p.1 #15 · p.1 #15 · 24 mega test


I redid the test. the 24 tse was definitely front focused a bit. I am finding it difficult to get perfect focus with it, as it consistently beats the 24-70Ii in the near corners, but looses in the far corners.
the 24-70II is truly an exceptional lens. I would say, bottom line at 24mm, if you dont need tilt shift (big if) the 24-70II is simply exceptional.

I also found that with critical focus, the 16-35 F4 matches the 24-70 at f8 in the entire frame, and actually beats it at 35mm. the 24-70 F4 IS, seems to parform slightly better at 35 in the corners than its more expensive brother, but this is all splitting hair.

I was also surprised, despite what you would think is a very large dof at f8 and 24 mm, variations in focus still make a difference.



Aug 23, 2014 at 02:26 PM
Gunzorro
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p.1 #16 · p.1 #16 · 24 mega test


kevindar wrote:
I redid the test. the 24 tse was definitely front focused a bit. I am finding it difficult to get perfect focus with it, as it consistently beats the 24-70Ii in the near corners, but looses in the far corners.
the 24-70II is truly an exceptional lens. I would say, bottom line at 24mm, if you dont need tilt shift (big if) the 24-70II is simply exceptional.

I also found that with critical focus, the 16-35 F4 matches the 24-70 at f8 in the entire frame, and actually beats it at 35mm. the 24-70 F4 IS, seems to parform slightly better
...Show more

Kevin -- Thanks again for your comparison tests.

And, yes, I totally agree (having done a few comparisons myself) that critical focus is, well . . . critical! Ha-ha! I know it sounds trite, but it is really hard to achieve perfect focus, especially in field conditions -- even using LV at 10X.

I found for broader results, cross checks between cameras is a useful approach to get a better read on when you are dealing with lens aberrations vs. focus errors (human, or camera). I've got a Manfrotto dual camera plate where I can mount two bodies (5D2 and 1Ds3), and switch the lenses between, giving a added cross-check to the lens and the LV focusing. It's a lot of fiddling, but running the full aperture range (to f/16) on numerous subjects/scenes gives pretty revealing results.

These comparisons have had a practical result that has improved my photography. Like you, several times I've found lenses that were out of whack (notably 16-35II) and not equal on corners or sides and sent off to Canon for proper adjustment. It's sometimes hard to catch otherwise, shooting at f/11 a lot of the time, you don't realize what you are missing even at that small aperture.

Anyhow, one comparison is good, two is better, 20 is better still!

I really appreciate you and Jim providing these results. I wish I had some of these newer lenses to test (especially 16-35 IS and 24-70II). Maybe a call to CPS will be in my future to try the 16-35 IS, once the initial demand subsides.



Aug 23, 2014 at 03:22 PM
kevindar
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p.1 #17 · p.1 #17 · 24 mega test


thanks so much. here for referrence, the repeat test. at f4, the 24-70 is still sharper. at f5.6, cant tell them apart. of course the tse looks better than my original test, which was front focused.
I also included bottom corners, where its in reveres, and TSE is definitely sharper, even at f 5.6.
it also tells you the slight differences in filed curvature, and what it does

scene with point of comparison
main by kevindar, on Flickr

f 5.6 f4 bottom (sorry, cant figure out how to position them)top, zoom left (its in the title of the images too)
tse 24L by kevindar, on Flickr


bottom edge
bottom by kevindar, on Flickr
crops
bottom 100 by kevindar, on Flickr



Aug 23, 2014 at 03:30 PM
Dutchphotog
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p.1 #18 · p.1 #18 · 24 mega test


Great comparison, thanks for sharing.

You mention the 24-70 f4.0 IS, but it's missing from the crops.
Did you test it also, and how does it compare to the 24-70 2.8 ?




Aug 23, 2014 at 07:09 PM
kevindar
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p.1 #19 · p.1 #19 · 24 mega test


I did test the 24-70 f4. its missing, as I elimininated the tamron and that lens, simply b/c I could only do 6 pannels at a time. I will post the 24-70/105 for you.
Over all, the 24-70 2.8 II is slightly sharper at 24, may be a touch less at 35. I will post all 4 lenses.



Aug 23, 2014 at 07:26 PM
kevindar
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p.1 #20 · p.1 #20 · 24 mega test


Ok here you go. I have also done a brick wall test. there, the 24-70L wins. it has a more flat Focus field. it is also very good at 2.8. the tamron turns in the most surprising perfromance, bettering the canon 24-70 f4L. I have been through many copies of tamron before getting this golden copy. It is still not as good as canon 2.8 II in a flat wall test, however, it seems to have good near and far field sharpness.
I also always felt the 24-105 is grossly underappreciated. or I have a very good copy of it.

f4
edge left
f4 left edge by kevindar, on Flickr

corner top right. 2.8L II wins
f4 top right by kevindar, on Flickr


corner bottom right. tamron wins
f4 bottom right by kevindar, on Flickr



Aug 23, 2014 at 07:44 PM
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