Comments on: Sigma OS Macros on 5DIII / 1Dx Issue

By: Ivan

Ivan — Tue, 21 Aug 2012 00:53:25 +0000

I see this on 5d3 with Tokina 16-28. It’s mostly noticeable at 2.8 at longer exposure

By: Ertan

Ertan — Wed, 15 Aug 2012 07:21:22 +0000

Same thing happens with Tokina 11-16mm f2.8 on 5DMarkII in JPEGs. I know this is not a FF lens but it fits and works pretty well on 15-16mm, and Peripheral … creates the same halos around. Turn off the Peripheral … (whatever) and you are fine.

By: John

John — Mon, 13 Aug 2012 00:43:13 +0000

this is also an issue on the Sigma 50mm and 85mm 1.4′s again just turn off the Peripheral illumination…
Other than that Sigma glass seriously rocks… I use Canon L and Sigma glass mix of primes.

By: Kai

Kai — Sun, 12 Aug 2012 07:07:39 +0000

Roger,

Canon actually recommends to turn off Peripheral Illumination Correction and Chromatic Aberration Correction for non-Canon lenses in the 5D Mk III manual (see the warning box on pg 149 of the English manual). Seems that we now know why

By: Dominic Schulz

Dominic Schulz — Sat, 11 Aug 2012 17:39:58 +0000

Well thats nothing new. My Sigma 50 1.4 did this over a year ago on my 5D2. Just turn off illumination correction for shooting jpeg and converting raws via canon dpp. third party raw converters do not read the vignetting info out of the raw files and hence are not affected. its not a problem with the lens itself, just a software issue.

btw: interestingly, a freshly bought 50 1.4 did not show the effect on my 5d3.

By: Piotr Krochmal

Piotr Krochmal — Sat, 11 Aug 2012 16:37:39 +0000

For me its simple, Illumination correction = shitty name for vignetting correction. As long as Canon didn’t make proper test and proper correction for Sigma lenses, body try to use what he has – presets for different lenses. So we got halos – unproperly corrected vignetting.
Back to work

By: robert cook

robert cook — Sat, 11 Aug 2012 10:50:11 +0000

I think it is a firm ware issue in the canon camera,, to make Non canon lenses not function properly, on purpose. Something on the same line as making canon EF (s) mount lenses NOT function on EF bodies so you are forced to buy a EF mount glass, if you up grade to a full frame body. Tamron , Tokina and Sigma lenses fit both canon body mounts,, why would canon NOT do the same thing ??? I believe it is a FORCED consumer up grade surprise !! Why would canon want to support after market lenses and make them work ? I have tried a new Sigma lens on a canon 7d body ,, and and talk about RUSSIAN ROULETTE FOCUS ISSUES !!!! WOW ! It makes there normal OUT OF FOCUS ISSUES LOOK TAME !! I believe it is PLANNED ERROR , for NON FUNCTION support !!! canon’s answer,, blame SIGMA !!

By: Jakub

Jakub — Sat, 11 Aug 2012 00:02:59 +0000

The same in Sigma 85 1.4 with 5D Mark II. And solution, the same -> turn of Illumination Correction in body.

By: DR. GUILLERMO SIMON-CASTELLVI

DR. GUILLERMO SIMON-CASTELLVI — Fri, 10 Aug 2012 21:55:27 +0000

Due to its attractive price, I recently bought a SIGMA 120-300mm F2.8 EX DG OS APO HSM to test my new CANON EOS 5D Mark III in Saint Peter’s Basilica (The Vatican) and soon discovered that the lens did not focus properly with the new Canon camera. It worked properly with my old Canon EOS 7D. I returned the lens and asked for a refund. Sigma lenses are not properly tested prior to reach the stores. The frequent problems with Sigma lenses, and other products (e.g. focusing problems with Nikon D800) should convince manufacturers to perform intensive beta-testing before launching their products!

By: intrnst

intrnst — Fri, 10 Aug 2012 18:53:49 +0000

Bull’s eye, Mr Zhao

http://tiny.cc/i88tiw
http://tiny.cc/w98tiw