topic Re: Canon R3 extreme banding in available light extreme iso ;extreme speed; stopped down aperture f in EOS DSLR & Mirrorless Cameras

Canon R3 extreme banding in available light extreme iso ;extreme speed; stopped down aperture f22>

Matjulu67 — Tue, 08 Apr 2025 14:40:19 GMT

Hello friends

Pro wildlife safari in Southern Africa .

Equipment: 2 R3s & R5 mk2

Lenses Rf400mm 2.8 RF600mm Rf70-200 2.8 Z

Experiencing shocking purple banding in available light subjects animals burds all sorts.

dragonflies in flight extreme settings to test for suspected problems with 1 R3 body..

Settings

Speed 1/64000 ISO 102800

Aperture stopped right down south of F22

Why the test to expose / accentuate aggravate expose the problem!!!! ?

only one R3 does it

Both configured identical.

Suspect Problem

Re: Canon R3 extreme banding in available light extreme iso ;extreme speed; stopped down aperture f

rs-eos — Tue, 08 Apr 2025 15:01:01 GMT

I'm assuming you only maxed out the shutter speed and ISO to perform such comparison tests. How do the cameras compare though using more appropriate values?

When you conducted the tests, were both R3s powered on at the same time (after being off for say at least an hour, perhaps longer). Where I'm going with this is that perhaps one camera was internally hotter than the other which may account for the differences.

Also, when doing your experiment, did you use the same exact lens (swapped it between R3 bodies)? I don't expect that to cause the banding, but best to keep all variables the same if possible when conducting tests.

Re: Canon R3 extreme banding in available light extreme iso ;extreme speed; stopped down aperture f

Peter — Tue, 08 Apr 2025 16:12:01 GMT

Har to know without any pictures. Share some raw files.

Re: Canon R3 extreme banding in available light extreme iso ;extreme speed; stopped down aperture f

Matjulu67 — Tue, 08 Apr 2025 16:51:34 GMT

Good evening Ricky from the Kruger NP South Africa.

Firstly thanks for devoting time to help before I send the troublesome ( older of the two) body in for inspection/repairs.

In direct answer to your first question both bodys with the 400 and 600 were powered up simultaneously to yes, nullify perhaps that as you suggest heat is affecting things and began firing away to full buffer.

Alas no matter what I did to provoke the newer of the two (one vs two years ) it excelled band free throughout irrespective whether I swapped lenses.

I will respond now to Peter attaching screenshots from Raw if thats okay.

Thank you sincerely

Stephen (Matjulu67)

Re: Canon R3 extreme banding in available light extreme iso ;extreme speed; stopped down aperture f

Matjulu67 — Tue, 08 Apr 2025 16:54:28 GMT

Good evening Peter from location Kruger NP. South Africa.

Thank you kindly for replying.

I will send screenshots of the problem a little later. Just now I am about to head out on a nocturnal safari

Sincerely Stephen (matjulu67)

Re: Canon R3 extreme banding in available light extreme iso ;extreme speed; stopped down aperture f

Matjulu67 — Tue, 08 Apr 2025 17:22:18 GMT

Peter as requested please see raw screenshots .

On the bird shot note another trait common to all when. in firing off to buffer... the variation in banding intensity.

Thank you sincerely

to close, it made no odds no matter the cards i used..cross ref Rickys help please.

Stephen

Re: Canon R3 extreme banding in available light extreme iso ;extreme speed; stopped down aperture f

Matjulu67 — Tue, 08 Apr 2025 17:27:14 GMT

Hi Ricky

As I promised plesse see raw files 3 of many msny from the troublesome body..As i noted to Peter (Illuminary) note the variation in intensity of the bands whence firing off to buffer

Re: Canon R3 extreme banding in available light extreme iso ;extreme speed; stopped down aperture f

kvbarkley — Tue, 08 Apr 2025 17:46:37 GMT

Those aren't raw files. At the least they are raw captures from an HDMI device.

Re: Canon R3 extreme banding in available light extreme iso ;extreme speed; stopped down aperture f

shadowsports — Tue, 08 Apr 2025 17:55:47 GMT

@matjulu67,

Please use a file sharing service (Google Drive, OneDrive, etc) and provide us with a link so we can evaluate your images. Also, please swap the media card(s) between camera's and see if the behavior follows.

Thanks 😀

Re: Canon R3 extreme banding in available light extreme iso ;extreme speed; stopped down aperture f

Matjulu67 — Tue, 08 Apr 2025 18:02:04 GMT

Gday Rick

Done all the obvious stuff like swapping out cards to both bodies. The probs only with one body the old one around a year ish old

Not going to link through google or any gile service you can see the prob clear as day.

Cheers

Re: Canon R3 extreme banding in available light extreme iso ;extreme speed; stopped down aperture f

Matjulu67 — Tue, 08 Apr 2025 18:03:20 GMT

I pointed out they werent RAW..

Not bothering yo raw file server them..you can see the prob clear as

Cheers

Re: Canon R3 extreme banding in available light extreme iso ;extreme speed; stopped down aperture f

Matjulu67 — Tue, 08 Apr 2025 18:04:40 GMT

Correct..i told all they weren't.

Thyre screenshots of the RAWS.

Ehats your Problem. You can see the mess!!!!

Re: Canon R3 extreme banding in available light extreme iso ;extreme speed; stopped down aperture f

rs-eos — Tue, 08 Apr 2025 19:11:57 GMT

That's fine if you cannot provide links to access the original RAW files. However, additional help from those on this forum will be limited.

Re: Canon R3 extreme banding in available light extreme iso ;extreme speed; stopped down aperture f

Matjulu67 — Tue, 08 Apr 2025 19:33:50 GMT

Pathetically Pedantic Procedural Politik

Ive been round shooting for 50 years and on principle if these screenshots dont illustrate the problem forget it

Re: Canon R3 extreme banding in available light extreme iso ;extreme speed; stopped down aperture f

kvbarkley — Tue, 08 Apr 2025 20:26:55 GMT

In order to narrow down exactly where the problem is we need to start with one thing at a time, hence asking for raws to check the sensor and digic.

With what you showed it could be an LCD problem.

Re: Canon R3 extreme banding in available light extreme iso ;extreme speed; stopped down aperture f

Matjulu67 — Tue, 08 Apr 2025 20:42:14 GMT

Thank you kindly, I apologise for my terse reply earlier this whole trips going pear shaped.

I will send you a link to the raw file tomorrow

I would say its not the LCD as you can see it very clearly on the electronic screen.

Good night