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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 05 Feb 2015 (Thursday) 22:10
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Canon EF 11-24mm F4L USM Lens is here!

 
Mornnb
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Apr 14, 2015 08:23 |  #286

Invertalon wrote in post #17515227 (external link)
Anybody else noticing some weird behavior with edge sharpness at all? I am thinking it may be a field curvature thing, but not exactly sure.

I tested out my 11-24 very carefully when I got it and the corner and edge sharpness across the frame always looked comparable with no real difference. After using it on a trip quite heavily, I seem to think that the right edge of the frame is usually a little softer near the edge. The weird thing is, sometimes its razor sharp and other times not... I assume it depends on where the focus point is and all that, but the left side doesn't seem to follow the same trends. It always seems a bit more consistent and holds sharpness from near/far where the right side may be better at near than far in terms of DOF. I have seen some field curvature maps and have seen most lenses are not exactly symmetrical, so I suppose it makes sense if it is a little imbalanced.

It seems to be that the edges get sharpest when the focus point is closest to infinity on a landscape shot. I know many lenses (especially UWA's) usually have some type of field curvature, I am not concerned about that... But just seeing if anyone else has noticed some weird results with edge sharpness?

I know with UWA's (especially at 11-12mm or so) the lens mount and sensor position can play a huge part... I haven't been able to try it out on another camera to see though if that helps.

I have had a few decentered UWA lenses before and this isn't like those... With those, you could never really get the sharpness. With the 11-24, I get razor sharp images at the edge of the frame (both sides) wide open, but depending on the shot sometimes the right seems to lag behind the left. I just have not figured out the trend yet. I need to spend some time and try to see when it occurs I suppose!


You may have a slightly decentered element. Which happens, there is copy variation. The required precision to avoid copy variation would cost about $20,000 per unit. -?


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Invertalon
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Apr 14, 2015 08:57 |  #287

Mornnb,

I thought so too, but after testing it carefully again the sharpness on both extreme left/right are just fine, wide open and stopped down. Each corner of the frame is also very sharp. I have had quite a few decentered lenses over the years, so I know how badly those can perform. I think my original post was more just not understanding how the depth of field works with this lens, near the edge of the frame.

Now that I have a better idea, all should be good!


-Steve
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David ­ Arbogast
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Apr 14, 2015 09:11 |  #288

Mornnb wrote in post #17516644 (external link)
You may have a slightly decentered element. Which happens, there is copy variation. The required precision to avoid copy variation would cost about $20,000 per unit. -?

Wow!


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phantelope
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Apr 14, 2015 21:58 |  #289

DigitalRev TV posted a review of this lens, using it in ways I have not tried yet. Quirky review, as always, but yes, it's a bloody fantastic lens :-)

http://www.cameraegg.o​rg …deo-review-at-digitalrev/ (external link)


40D, 5D3, a bunch of lenses and other things :cool:

  
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David ­ Arbogast
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Apr 14, 2015 22:14 |  #290

phantelope wrote in post #17517604 (external link)
DigitalRev TV posted a review of this lens, using it in ways I have not tried yet. Quirky review, as always, but yes, it's a bloody fantastic lens :-)

http://www.cameraegg.o​rg …deo-review-at-digitalrev/ (external link)

When I watched that last night I must say I thought it was pretty exciting. He typically seems so bored with the products he is reviewing that his reviews just seem like their more comedy routines and less review. But, he was clearly very enthused and impressed with the 11-24mm.

It really is killing it in reviews, isn't it? Amazing optics. I was over on the Digital Picture as well using their lens comparometer to compare the 11-24mm vs 14-24mm. My, but the 11-24mm is so extremely impressive regarding distortion control. While the 14-24mm shows bowed/crooked lines (barrel distortion), the 11-24mm has them beautifully straight.


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Eulenspiegel
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Apr 15, 2015 02:41 |  #291

David Arbogast wrote in post #17515937 (external link)
But the 11-24 goes to eleven!

from This Is Spinal Tap:


https://m.youtube.com/​watch?v=KOO5S4vxi0o (external link)

Made my day!!!

Thank you!


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MikeES
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Oct 14, 2016 15:52 |  #292

This arrived in the mail a few days ago...can't wait to take it out and see how she does!

IMAGE: https://c7.staticflickr.com/6/5665/29971252230_1134a67629_b.jpg
IMAGE LINK: https://flic.kr/p/MEsv​77  (external link)
Lee Filters SW150 (external link) by MikaErkki (external link), on Flickr

IMAGE: https://c3.staticflickr.com/9/8414/30233153586_6105436277_b.jpg
IMAGE LINK: https://flic.kr/p/N4AP​fJ  (external link)
Big Stopper on the SW150 (external link) by MikaErkki (external link), on Flickr

I picked up an ND grad and the big stopper.
I'll try to post in here how the set up does as I play around with it.

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1D X | White Kiss X7 | White 40 F2.8 Pancake | 50 F1.2L | 100 F2.8L IS Macro | 300 F4L IS | 11-24 F4L | 24-70 F2.8L II | 70-200 F2.8L II IS | Σ 150-600 OS Sport
580EXII | AB1600 | ABR800 | 1.4x II | Lee SW150 II | Kenko DG Tubes

  
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HKFEVER
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Oct 16, 2016 05:07 as a reply to  @ MikeES's post |  #293

T bone steak dinner plate  :p

Heard it is only good to 12.5mm. No good at 11mm :oops:




  
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jwcdds
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Oct 17, 2016 00:06 |  #294

IMAGE: https://photos.smugmug.com/Misc/Lens/Canon-1124L/i-FqRNdLP/0/XL/20161015-Canon%20EOS-1D%20X%20Mark%20II-1DX27914-XL.jpg

IMAGE: https://photos.smugmug.com/Misc/Lens/Canon-1124L/i-sS3ftXw/0/XL/20161015-Canon%20EOS-1D%20X%20Mark%20II-1DX27938-HDR-XL.jpg

Julian
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rejay14
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Oct 24, 2016 19:23 |  #295

jwcdds wrote in post #18158865 (external link)
QUOTED IMAGE
QUOTED IMAGE

How much work was involved to correct distortion? I have never used the lens, no idea how much it would distort. I imagine that using the right technique, it would be ok, but any miscalculation would be horrendous.


1DX Mark II, 5D Mark IV, 40D,Rebel XT :lol:, 70-200L 2.8 IS II, 100-400L IS II,24-105 II L, 100mmL 2.8 IS, 16-35L 2.8 II, 24-70 2.8L II, Sigma 50mm 1.4 Art, Sekonic 758DR, Pixma 9500 II, Pixma 9000 II, Think Tank Airport Accelerator v2.0, Canon 600EX-RT x 5, Profoto B1 Kit with too many modifiers http:// …www.PrestigePhotoPro.c​om (external link) Portfolio (external link)
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jwcdds
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Oct 24, 2016 21:46 |  #296

rejay14 wrote in post #18165912 (external link)
How much work was involved to correct distortion? I have never used the lens, no idea how much it would distort. I imagine that using the right technique, it would be ok, but any miscalculation would be horrendous.

There is very little correction necessary as long as I keep the lens/camera leveled. But the corrections that I made were done very easily/quickly using the "transform" tooth in LR6.71(? I think we're at 6.71 now).


Julian
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rejay14
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Nov 01, 2016 18:15 as a reply to  @ jwcdds's post |  #297

I use those tools a lot too, thanks for the reply!


1DX Mark II, 5D Mark IV, 40D,Rebel XT :lol:, 70-200L 2.8 IS II, 100-400L IS II,24-105 II L, 100mmL 2.8 IS, 16-35L 2.8 II, 24-70 2.8L II, Sigma 50mm 1.4 Art, Sekonic 758DR, Pixma 9500 II, Pixma 9000 II, Think Tank Airport Accelerator v2.0, Canon 600EX-RT x 5, Profoto B1 Kit with too many modifiers http:// …www.PrestigePhotoPro.c​om (external link) Portfolio (external link)
Concert Photography (external link)

  
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Canon EF 11-24mm F4L USM Lens is here!
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