topic Re: my picture shows huge black ring in EOS DSLR & Mirrorless Cameras

my picture shows huge black ring

appletrees — Fri, 21 Jun 2013 01:46:44 GMT

I just got a brand new 5Dmk3 last week and put sigma 50mm 1.4 on it. There were huge black circles appeared on my pictures after taking few testing shots.( two pictures had the circles)

Would anyone know what is causing this problem? Is it the camera or the lense? Both are too new to me. So I am perplexed.

I have searched the internet but could not find anythng similar to my problem. Thank you!!

Re: my picture shows huge black ring

cicopo — Fri, 21 Jun 2013 02:18:55 GMT

Just to help people looking at the sample did you have a filter on the lens or was it just the bare lens? If you do have a filter see what it does without it.

Re: my picture shows huge black ring

appletrees — Fri, 21 Jun 2013 03:09:31 GMT

Thank you cicopo, for your answer.

I tried both with and without the filter after posting. Now there are circles on all of my pictures.

Re: my picture shows huge black ring

TCampbell — Fri, 21 Jun 2013 04:17:40 GMT

Given a the digital sensor will read out the pixels in rows and columns and this circular pattern matches the shape of the image circle as projected by the lens, my inclination is to believe that this is being projected onto the sensor by the lens and is not caused by the camera or sensor.

Do you have any other lenses you can use to test?

Re: my picture shows huge black ring

WahoGT — Fri, 21 Jun 2013 05:07:02 GMT

My guess is one of the elements in the lens is misaligned. I can't think if a reason the body would do that to an image.
Try another lens if you can.

Re: my picture shows huge black ring

appletrees — Fri, 21 Jun 2013 15:01:26 GMT

Thank you all for your inputs. I tried with another lens and so far only the sigma is showing that hard line circles. Hope it is just the problem of the sigma lens not the body. I am sending the sigma lens back today.

Re: my picture shows huge black ring

diverhank — Fri, 21 Jun 2013 17:42:54 GMT

Out of curiosity, is your sigma a DG or DC? I don't know much about non-Canon lenses but I read that DC models are for cropped cameras only and something like you're seeing will happen with full frame cameras like a 5D3. DG lenses should not have this problem.

Re: my picture shows huge black ring

appletrees — Fri, 21 Jun 2013 19:40:54 GMT

The sigma lens is DG which is for FF. If it was for Crop bodies, it should have shown the vignetting on the 4 corners of the photos. But the circles I got were not vignetting type which you can see from the picture. Never seen anything like this before.

Re: my picture shows huge black ring

amfoto1 — Sat, 22 Jun 2013 04:45:52 GMT

All Sigma 50/1.4 are DG (full frame).

The Sigma 30/1.4 is a DC lens (crop only).

The OP's problem is really weird. I've never seen anything like that. It's not a sensor or shutter problem. It also doesn't look like a lens issue, because those are usually out of focus.

It almost looks as if a Fresnel lens (such as is used in some focusing screens) is in front of the sensor. The sharpness of the focus of the black circles might be a clue. I'd use the camera's manual cleaning setting to open the shutter without the lens on, and inspect the filter in front of the sensor.... Brand new camera, maybe it has a fault. Only problem is, it sounds as if this issue isn't on all images, happens erratically. If there were actual marks on the anti-alias filter, I'd expect the fault to show up in every image, though it might vary a little depending upon light intensity. Erratic appearance of the fault in only a few images suggests a bad electronic component, but I've never seen one that draws circles on images!

Re: my picture shows huge black ring

appletrees — Sat, 22 Jun 2013 15:30:33 GMT

I just opened the pictures with the rings(raw format) with Photoshop ACR. Strangely enough those rings are gone when it is opened. But from the original raw file(of course Jpeg from camera too) does show the rings. Getting stranger... I would not know what could cause this with my limited knowledge.

Re: my picture shows huge black ring

sigree1975 — Thu, 29 Aug 2013 12:46:23 GMT

Hi, did you ever find a solution to this as I've got the same with my new Sigma 35mm 1.4 on 5D mark iii

Re: my picture shows huge black ring

appletrees — Thu, 29 Aug 2013 21:43:31 GMT

I am sorry to hear that you have a same problem. I did not find the solution. I tried another new sigma lens and it had the same problem. So I ended up returning the 5dmk3 and got a new 5dmk3 and since then I have had no problems. Hope you can find the solution.

Re: my picture shows huge black ring

juanky — Sat, 09 Nov 2013 13:45:59 GMT

Disable lens corrections when youre using that lens or uncheck the EF 35mm 1.4 lens profile using EOS Utility. It worked for me.

Re: my picture shows huge black ring

appletrees — Mon, 11 Nov 2013 01:21:55 GMT

Thank you so much for the solution, I will try that with my new lens.

Re: my picture shows huge black ring

smcdaniel — Thu, 14 Nov 2013 17:36:32 GMT

Could it be a watermark? Is there a setting in the camera to apply one in processing?

Re: my picture shows huge black ring

juanky — Thu, 14 Nov 2013 19:27:33 GMT

My guess is that it uses those rings to calculate both chromatic aberrations and vingette. Since its not a Canon brand lens it gets stuck in the process.

If you disable just one you'll get one ring...

Re: my picture shows huge black ring

Mariovega — Thu, 08 Mar 2018 06:30:19 GMT

I had the exact same thing happen just now. Although, I am using a Tamron 45mm on a 5d mk4. I also, had never seen anything like it. Please let me know if you found a solution to it.

Re: my picture shows huge black ring

Ray-uk — Thu, 08 Mar 2018 13:14:13 GMT

Disable Peripheral Illumination Correction with non-Canon lenses, it is known to cause problems like this.

Re: my picture shows huge black ring

wq9nsc — Thu, 08 Mar 2018 14:38:17 GMT

I accept that Sigma, Tamron, and others make some decent glass and in some cases have a feature set unavailable from Canon but these are the sorts of issues that can happen when a compnay has to reverse engineer compatability with a camera body. It sounds like the causes/work-around has been identified in this thread which again shows how valuable forums like this are for owners.

I am intrigued by Sigma's upcoming 105mm F1.4 lens (a combination not available in Canon glass) but it is threads like this one that give me pause that little quirks may be present. I will probably end up with a Canon 85mm 1.4 instead.

The best "glass" you can justify/afford is the best investment in your future photography. A good lens will outlast several generations of bodies and will provide the best your camera body can deliver. When I was finishing up the PhD program when the EOS line first came out I "saved" money by buying a couple of aftermarket lenses-a mistake I won't repeat.

Rodger

Re: my picture shows huge black ring

PapaSarge — Wed, 13 Mar 2019 00:20:24 GMT

Thank you for that. I disable the lens correction and it cleared up perfectly. funny thing, this lens works fine with lens correction on my crop sensor, and my other lenses work fine of the full frame and crop sensor alike. Anyhow. thanks for the fix. and it was only happening in manual modes with jpeg. all raw and jpeg auto was fine. now all modes are good with your suggested fix