How to Fix Weird Visual Behaviour With Your EOS 5D Mark IV & Third Party Lenses

[iaind]

There is one sure fix. Swap your third party lenses for post 2010 L series lenses

 

[flux capacitor]

What's the Problem here actually?
I have no Problem with the Sigma 35mm Art on the 5D MK IV or the 5Ds at all and Peripheral illum corr is turned on.
Is this an Error which can occur randomly?

 

[GuyF]

What's the Problem here actually?
I have no Problem with the Sigma 35mm Art on the 5D MK IV or the 5Ds at all and Peripheral illum corr is turned on.
Is this an Error which can occur randomly?

I guess you didn't follow the link I posted, "...the phenomenon of some underexposure when used and either “Evaluative Metering” or “Center-weighted Average Metering” is selected in Metering Mode of the camera."

 

[flux capacitor]

I guess you didn't follow the link I posted, "...the phenomenon of some underexposure when used and either “Evaluative Metering” or “Center-weighted Average Metering” is selected in Metering Mode of the camera."

Jep, didn't do that. But thanks for clearing things up.
I use the Primelens only in Manual Mode when working with Strobes, so the Metering is not really in use and I think I'm safe on the error.

 

[Avegagti]

Re: How to Fix Weird Visual Behaviour With Your EOS 5D Mark IV & Sigma Lenses

What idiot would put a Sigma lens on that camera?

Ummm.. I have the 24-35 2.0 and honestly can't think of any comparable lens that comes even close in that range unless you buy a 24 1.4 AND a 35 1.4. I've had a Canon 85 1.2 and I've been so impressed I'm most likely going with the sigma art 85 1.4 when it's released this month.. I'll be the idiot with amazing images any day

 

[Avegagti]

My mkiv is in the mail, but I spoke to Sigma yesterday and the issue, at least with Sigma, is that they reverse engineer vs license with Canon, so whole the issue is limited to certain lens/camera combos, Canon has lagged communicating with 3rd party lens makers with firmware releases.

Sigma has supplied canon what they need and we should see a firmware update soon. The 2 incompatible features are lens correction (specifically peripheral illumination) and manual focus override (where you can manual focus while still in af)

Doing some research, there should be no issue with af at all, and if I need to lens correct I usually do it in LR anyways.

Btw, I'very been blown away with Sigma art series and don't see myself going back to canon glass for my type of work..

 

[boels069]

My mkiv is in the mail, but I spoke to Sigma yesterday and the issue, at least with Sigma, is that they reverse engineer vs license with Canon, so whole the issue is limited to certain lens/camera combos, Canon has lagged communicating with 3rd party lens makers with firmware releases.

Sigma has supplied canon what they need and we should see a firmware update soon. The 2 incompatible features are lens correction (specifically peripheral illumination) and manual focus override (where you can manual focus while still in af)

From an earlier post:
It has to do with LensTypeValue in EXIF and holds for any 3rd party lens.
See:
http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/Canon.html#LensType

I don't think Canon is going to change the firmware, it is up to Sigma to change the lens firmware.

 

[chobie]

Has this issue been fixed by recent firmware upgrades on either side?