topic Re: Canon R5, light leakage? Brighter exposure on the edge of my photos in EOS DSLR & Mirrorless Cameras

Canon R5, light leakage? Brighter exposure on the edge of my photos

bolofoto — Mon, 14 Dec 2020 06:03:11 GMT

There seems to be a bright overexposure running along one edge of my photos, seems to be the bottom of the censor maybe. Anyone else experience this? I am using a Canon EF adaptor and a Sigma 35mm lens.

Re: Canon R5, light leakage? Brighter exposure on the edge of my photos

Ray-uk — Mon, 14 Dec 2020 12:10:14 GMT

You really need to post a picture so that we can see this. If it is appearing at the bottom of the picture then it is at the top of the sensor.

Does it happen with a standard Canon lens, some adaptors can suffer from internal reflections that cause bright spots.

Re: Canon R5, light leakage? Brighter exposure on the edge of my photos

bolofoto — Mon, 14 Dec 2020 21:03:13 GMT

Here are some photos, not sure if its ok to post them here.

Re: Canon R5, light leakage? Brighter exposure on the edge of my photos

Waddizzle — Mon, 14 Dec 2020 21:24:41 GMT

Which edge is overexposed?

Re: Canon R5, light leakage? Brighter exposure on the edge of my photos

bolofoto — Mon, 14 Dec 2020 21:29:15 GMT

The bottom or the right side when camera is rotated. You can see that bright strip.

Re: Canon R5, light leakage? Brighter exposure on the edge of my photos

Waddizzle — Mon, 14 Dec 2020 22:37:12 GMT

Are you using any strobes or flash? Were you using the silent shutter? If the answers are "no and no", then you need to contact Canon Support.

Re: Canon R5, light leakage? Brighter exposure on the edge of my photos

bolofoto — Tue, 15 Dec 2020 02:28:10 GMT

Yes, I was using off camera flash, but no to the silent shutter. 1st Curtain electronic.

Edit: Confirmed, this happens when using Electronic or 1st Curtain electronic. Not mechanical shutter. I also noticed it happens when the shutter speed is above 1/250th of a second. At 1/200th I do not see it.

Re: Canon R5, light leakage? Brighter exposure on the edge of my photos

bolofoto — Tue, 15 Dec 2020 05:04:36 GMT

So can anyone tell me if this is a problem with the sensor or is it because of a Sigma Lens and Canon EF Adapter? I never had this problem with my Canon 90D. Thanks in advance.

Re: Canon R5, light leakage? Brighter exposure on the edge of my photos

shawnphoto — Tue, 15 Dec 2020 07:13:38 GMT

I have seen this before with the EOS R. Why it happened I never figured out, but randomly some images would have an oddly bright edge similar to this, always on the right/bottom edge. Haven't noticed it on the R5. It could be lens related, you never know. I would try a Canon lens if you have one.

Re: Canon R5, light leakage? Brighter exposure on the edge of my photos

Waddizzle — Tue, 15 Dec 2020 13:08:41 GMT

I think if you stop using the silent shutter with the flash/strobe, then the issue just may go away.

Re: Canon R5, light leakage? Brighter exposure on the edge of my photos

Ray-uk — Tue, 15 Dec 2020 20:48:37 GMT

@bolofoto wrote:
Yes, I was using off camera flash, but no to the silent shutter. 1st Curtain electronic.

Edit: Confirmed, this happens when using Electronic or 1st Curtain electronic. Not mechanical shutter. I also noticed it happens when the shutter speed is above 1/250th of a second. At 1/200th I do not see it.

Read your manual, maximum sync speed for electronic shutter is 1/250, for mechanical shutter it is 1/200. If you want to use higher shutter speeds then you need to use HSS flash but that opens another can of worms.

Re: Canon R5, light leakage? Brighter exposure on the edge of my photos

bolofoto — Tue, 15 Dec 2020 21:26:17 GMT

I was using HSS flash. This is not a high speed sync flash issue. That image stripe on the edge is there whether its 1/300 or 1/800 which were most of my shots. The sync issue would be MUCH more prononced and in different location based on shutter speed.

Also, as I mentioned, its not there in mechanical shutter.

Re: Canon R5, light leakage? Brighter exposure on the edge of my photos

Waddizzle — Tue, 15 Dec 2020 21:58:22 GMT

@bolofoto wrote:
I was using HSS flash. This is not a high speed sync flash issue. That image stripe on the edge is there whether its 1/300 or 1/800 which were most of my shots. The sync issue would be MUCH more prononced and in different location based on shutter speed.

Also, as I mentioned, its not there in mechanical shutter.

Exactly. Use the mechanical shutter. What's the point of using salient shutter with flashes and strobes popping off?