topic RF 100-500mm image issues in EF & RF Lenses

RF 100-500mm image issues

Nick117 — Fri, 29 Aug 2025 13:33:16 GMT

Hi all, I recently bought a 100 to 500mm for my R3, been loving it 90% of the time. Just recently, I noticed these lines appearing within the images. Inside the Red boxes. It also appears in video mode. They don't appear to show up from any other lens i have. So it seems to be an isolated issue with the lens. I don't suppose if anyone has had this issue. Or any ideas of what may be causing it. Many Thanks

Re: RF 100-500mm image issues

shadowsports — Fri, 29 Aug 2025 14:28:06 GMT

Greetings,

Was this lens purchased new?

I see some banding at the top of of the first image. The lines are pronounced in the beach photo with the bird and the crop below. My 100- 500 is sharp from the top to the bottom of the frame. I'd say to take a close look at your sensor but if it's only happening with this lens then it's not the body.

Re: RF 100-500mm image issues

ebiggs1 — Fri, 29 Aug 2025 14:37:33 GMT

" I'd say to take a close look at your sensor ~~but if it's only happening with this lens then it's not the body.~~

I would carry that a bit further and say it is the sensor. At least that is where I would focus m y investigation. Does the same irregularities show up with this lens at the 100mm side? Keep in mind as FL magnification increases so do faults and at the very same rate.

Re: RF 100-500mm image issues

Peter — Fri, 29 Aug 2025 18:31:09 GMT

I have seen it from other's 100-500 at dpreview. Can't find the thread right now.

No filter?

Edit: found one here https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Bokeh-looks-like-someone-doodled-over-it-with-the-liquify/m-p/340080

And another one here https://community.usa.canon.com/t5/EF-RF-Lenses/RF-100-500-background-distortion-Please-help/m-p/398211

Re: RF 100-500mm image issues

Waddizzle — Sat, 30 Aug 2025 03:53:59 GMT

I used to see something similar with my 6D and a Sigma 150-600mm. Are you using any type of filter?

Are you using a tripod with lens IS enabled?

It was only visible when I cropped in pretty far,