Sigma Artisans: Running With the New Sigma 24-70mm f/2.8 OS Art

SecureGSM

2 x 5D IV
Feb 26, 2017
2,360
1,231
I am glad that 24-70 II L LR profile worked for you well. Glad to be at least of some assistance :)

attached is the print screen of the image 14 out of 50, DPReview. link to the gallery can be found in my post above.
24-70 II L is nowhere near as bad CA wise at F4, and you can detect CA in Sigma lens even at F8 and that is a shocker.
I love my Sigma Art and Sports lenses but this new 24-70 is a flop. I am sorry to call it out as it is.

JayS_CT said:
I'm just not seeing that kind of level of CA (other the Sea Plane shot) in the ones you are considering very bad. Perhaps you can crop down to the specific area in some of the others (1:1) to show what and where you're seeing the severe CA?

I'm not here to defend a lens that I don't even have yet, but the full production lens' are out yet (to my knowledge). Sigma's also have the ability to be upgraded (via the dock - don't know how/if CA could be countered) and the IS is a nice to have feature that I TRULY wish Canon had considered in the MK II (otherwise a refurb' MK II would be in my kit already).

I am very interested in where you are specifically seeing the level of CA you're pointing out.

Jay S.

P.S. I also tried the Canon 24-70 2.8II profile and you're right.. better than the existing Sigma one... Adobe has some work to do. :)

SecureGSM said:
See how the Canon 24-70 F2.8 L II LR profile works for you ;)
It does clear CA for me very well. Vignetting is not an issue. CA levels are excessive comparing to Canon 24-70 lens performance in that department. I am not unique in finding the CA level of the lens to be excessive. There are many others who of the same opinion.
Please see lensRentals (not so favourable) review of this lens as well. I am happy that you find the lens performance adequate for your requirements and hope that the lens will serve you well for many years to come.

ps. DXO Optics Pro detects the lens as Canon 24-70 II L and applies lens profile correction automatically with a descent results.

JayS_CT said:
...I downloaded the RAW files and am not seeing things to the severity you're indicating. I'm on the latest LR6 Beta and using the older SIGMA 24-70 camera profile, vignetting at 2.8 clears up very nicely, as does flattening the image field. Turning CA adjustments on/off isn't showing much of a difference at all...
 

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Hflm

Gear: 5div, A7riii, A9 ...
Jan 10, 2017
88
0
Canon Rumors said:
The <a href="https://www.sigmaartisans.com/running-new-sigma-24-70mm-art/">Sigma Artisans blog</a> has posted some real world work from the brand new Sigma 24-70mm f/2.8 DG OS Art series lens.</p>
<p><strong>From Sigma</strong></p>
<blockquote><p>We invited Jess Baumung, a Toronto-based running and music photographer, to test out an early sample of the latest Sigma 24-70mm f/2.8 DG HSM | Art for a few hours and see what he could do. No big budgets or fancy post-processing, just one photographer, natural light and a few local Toronto runners in a real-world shoot.</p></blockquote>
<p><em>Photos: Canon EOS-1D X with the Sigma 24-70mm f/2.8 DG HSM | Art</em></p>
<p>Preorder Sigma 24-70mm f/2.8 DG OS HSM Art: <strong><a href="https://bhpho.to/2swJrCl">B&H Photo</a></strong> | <a href="https://www.adorama.com/sg2470dgeos.html?utm_source=rflaid64393">Adorama</a> | <strong><a href="https://mpex.com/sigma-24-70mm-f2-8-dg-hsm-os-art-lens-canon.html?acc=3">MPEX</a> | </strong><a href="http://www.awin1.com/cread.php?awinaffid=292297&awinmid=6241&p=https%3A%2F%2Fwww.parkcameras.com%2Fp%2FG245593C%2Fcanon-lenses-ef-mount%2Fsigma%2F24-70mm-f28-dg-os-hsm-art-standard-zoom-canon-fit-lens">Park Cameras</a> (UK)</p>
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Lensrentals showed their optical bench test. The Canon is still the best in this category, in my opinion:
https://www.lensrentals.com/blog/2017/07/sigma-24-70mm-f2-8-dg-os-hsm-art-sharpness-tests/
 
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SecureGSM

2 x 5D IV
Feb 26, 2017
2,360
1,231
for what it is worth:

http://disq.us/p/1km7a5s

"... As a regional Tamron representative, I have been assured by Japan that this is not actually the case [of Tamron 24 70 F2.8 VC G2 to have the exact same optical design as the predecessor.]. Glass formula and coatings in particular have changed, as well. They are by nature of field of coverage and certain correction characteristics similar but improvements have been made throughout the entire piece, inside and out. It is considered an overhaul..."
 
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