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RF 24-240: Digital artifacts @ 240mm. Normal?

Started Aug 30, 2021 | Questions
spec68 Contributing Member • Posts: 533
RF 24-240: Digital artifacts @ 240mm. Normal?

Just got a RF 24-240 for travel and noticed when I shoot at max zoom w/ my R5 I frequently end up with a frame of digital artifacts surrounding the picture. It's only noticible in processing. I don't see it in-camera, either when shooting or reviewing. It also doesn't occur 100% of the time -- maybe 95%. And it's only at 240mm exactly. Aperture doesn't matter.

I don't see this with any of my other RF lenses so I'm sure it's not my camera. I know the RF 24-240 is a quirky lens at max wide, requiring s/w correction to remove harsh vignetting, but is this true at max zoom too? Is the "artifact frame" in my picture "normal" for this lens and assumed the user will crop it out?

ANSWER:
Canon EOS R5 Canon RF 24-240mm F4-6.3
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SigZero
SigZero Contributing Member • Posts: 686
Re: RF 24-240: Digital artifacts @ 240mm. Normal?
3

If you are using ACR/LR then this is problem with "v2" version of profile for this lens. Use "v1" and the artifacts shoud be gone.

Br, Pawel.

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Canon EOS R5 Canon RF 100-500mm F4.5-7.1L IS USM Canon RF 70-200 F4 L Canon RF 14-35mm F4L IS USM Apple iPhone 13 Pro
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Karl_Guttag Senior Member • Posts: 1,884
Re: RF 24-240: Digital artifacts @ 240mm. Normal?
1

Certainly, this is not normal. It would help if you explained it this an out-of-camera JPEG or RAW image. If it is RAW, then what software did you use. I think it is unlikely that it is caused by the amount of zoom. Still, I tend to doubt the problem is in the software conversion.

On the surface, it looks like the file got corrupted, either a bad flash, in the camera writing to the flash, or in the data being transferred. On what medium did you store the image on and how did you transfer the image to the computer?  Some things to try:

  1. Try resaving the file. 
  2. Whatever you did, I would try a different method (if you say used a card reader, then try with the camera's USB cable or vice versa). 
  3. Try a different flashcard. 
  4. Also, try taking some test shots with storage to both cards and see if both files agree. 
  5. Run flashcard checking software

spec68 wrote:

Just got a RF 24-240 for travel and noticed when I shoot at max zoom w/ my R5 I frequently end up with a frame of digital artifacts surrounding the picture. It's only noticible in processing. I don't see it in-camera, either when shooting or reviewing. It also doesn't occur 100% of the time -- maybe 95%. And it's only at 240mm exactly. Aperture doesn't matter.

I don't see this with any of my other RF lenses so I'm sure it's not my camera. I know the RF 24-240 is a quirky lens at max wide, requiring s/w correction to remove harsh vignetting, but is this true at max zoom too? Is the "artifact frame" in my picture "normal" for this lens and assumed the user will crop it out?

 Karl_Guttag's gear list:Karl_Guttag's gear list
Canon EOS R5 Canon RF 15-35mm F2.8L IS USM Canon RF 24-70mm F2.8L IS USM Canon RF 70-200mm F2.8L IS USM Canon RF 24-240mm F4-6.3 +14 more
tkbslc Forum Pro • Posts: 17,522
Re: RF 24-240: Digital artifacts @ 240mm. Normal?

That is NOT normal.  If it doesn't happen in camera or when reviewing in camera, then it is your RAW processor.   It almost looks like it is doing a failed content-aware fill around the edges.    What are you using to process these?

Try a free alternative like Canon DPP or RAWTherapee and see if the problem persists.

spec68 wrote:

Just got a RF 24-240 for travel and noticed when I shoot at max zoom w/ my R5 I frequently end up with a frame of digital artifacts surrounding the picture. It's only noticible in processing. I don't see it in-camera, either when shooting or reviewing. It also doesn't occur 100% of the time -- maybe 95%. And it's only at 240mm exactly. Aperture doesn't matter.

I don't see this with any of my other RF lenses so I'm sure it's not my camera. I know the RF 24-240 is a quirky lens at max wide, requiring s/w correction to remove harsh vignetting, but is this true at max zoom too? Is the "artifact frame" in my picture "normal" for this lens and assumed the user will crop it out?

OP spec68 Contributing Member • Posts: 533
Re: RF 24-240: Digital artifacts @ 240mm. Normal?
1

Thanks everyone. My workflow is Bridge to weed out dups and others then push the rest to LR Classic. So based on the comments it does seem that it could be something Bridge is doing to the photos. I still have the originals on my card so I'll d/l DPP tonight and see if the anomaly repeats. Then we'll know for sure whether it's the lens or Adobe.

SigZero
SigZero Contributing Member • Posts: 686
Re: RF 24-240: Digital artifacts @ 240mm. Normal?

spec68 wrote:

Thanks everyone. My workflow is Bridge to weed out dups and others then push the rest to LR Classic. So based on the comments it does seem that it could be something Bridge is doing to the photos. I still have the originals on my card so I'll d/l DPP tonight and see if the anomaly repeats. Then we'll know for sure whether it's the lens or Adobe.

I'm pretty sure it's problem with adobe's "v2" profile for that lens. It's been reported here few times.

Br, Pawel.

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My photo-blog: http://pawel.online

 SigZero's gear list:SigZero's gear list
Canon EOS R5 Canon RF 100-500mm F4.5-7.1L IS USM Canon RF 70-200 F4 L Canon RF 14-35mm F4L IS USM Apple iPhone 13 Pro
the-genuine-particle New Member • Posts: 24
Click here to read my 1 cool trick to fix this odd problem.

spec68 wrote:

Just got a RF 24-240 for travel and noticed when I shoot at max zoom w/ my R5 I frequently end up with a frame of digital artifacts surrounding the picture. It's only noticible in processing. I don't see it in-camera, either when shooting or reviewing. It also doesn't occur 100% of the time -- maybe 95%. And it's only at 240mm exactly. Aperture doesn't matter.

I don't see this with any of my other RF lenses so I'm sure it's not my camera. I know the RF 24-240 is a quirky lens at max wide, requiring s/w correction to remove harsh vignetting, but is this true at max zoom too? Is the "artifact frame" in my picture "normal" for this lens and assumed the user will crop it out?

Very simple to fix.

Enter into the Adobe ACR interface.

Find and open the "Geometry" menu at right.

Select "Constrain Crop".

The image will be cropped properly now.

OP spec68 Contributing Member • Posts: 533
Re: RF 24-240: Digital artifacts @ 240mm. Normal?
2

Just to close out the thread, SigZero was right on the $ -- Adobe is the culprit here w/ the v2 lens correction profile. I switched to v1 and the artifacts were "cropped" out. To confirm, I also d/l DPP and DPP did not display the artifacts so the problem is w/ Adobe.

Thanks everyone for helping me solve this issue. It's another ding for LR. I'm going to have to take another look at CaptureOne and ON1.

CameraCarl Veteran Member • Posts: 9,193
Re: RF 24-240: Digital artifacts @ 240mm. Normal?

SigZero wrote:

If you are using ACR/LR then this is problem with "v2" version of profile for this lens. Use "v1" and the artifacts shoud be gone.

Br, Pawel.

Where do you find the different versions of the profile? In my copy of LrC there is only one profile available with my R5 in the drop down menus.

ProDude Senior Member • Posts: 4,851
Re: RF 24-240: Digital artifacts @ 240mm. Normal?

I sure don't get this issue when using DXO Photolab 4 nor with PhotoWorks, my other backup program. I left everything Adobe in the trash can years ago and that's where it's going to stay.

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