topic Circular Issues With Canon RF 15-35mm 2.8 taken on Canon R5 in EF & RF Lenses

Circular Issues With Canon RF 15-35mm 2.8 taken on Canon R5

CK0 — Sat, 17 Feb 2024 13:17:23 GMT

Hello!

I have had issues with this little circle appearing in my photos for my Canon 15-35 while taking long exposures. I can't seem to find the issue.

I am not sure if it is due to some correction if it is due to some ibis issue or maybe its the camera/lens itself. Anyway, I do have my high iso noise reduction mode on but also figured if I asked on here it would be best.

Here is the sample photos.

Thank you!

Issues in the middle with circular pattern

Re: Circular Issues With Canon RF 15-35mm 2.8 taken on Canon R5

rs-eos — Sat, 17 Feb 2024 13:30:52 GMT

That appears to be an interferance pattern. Perhaps "Newton's rings".

Were these taken when on a tripod and lens IS and/or IBIS engaged? Though I don't know if that would lead to this.

Re: Circular Issues With Canon RF 15-35mm 2.8 taken on Canon R5

CK0 — Sat, 17 Feb 2024 13:46:14 GMT

It might be due to the lens filter I have on top. I do have ibis on one photo and have ibis off on another.

CK0

Re: Circular Issues With Canon RF 15-35mm 2.8 taken on Canon R5

rs-eos — Sat, 17 Feb 2024 13:54:03 GMT

Ah, did not think to ask about an filters. That could also perhaps lead to the issue. What type of filter were you using? Variable-ND perhaps?

Re: Circular Issues With Canon RF 15-35mm 2.8 taken on Canon R5

jrhoffman75 — Sat, 17 Feb 2024 14:07:09 GMT

@CK0 wrote:
It might be due to the lens filter I have on top. I do have ibis on one photo and have ibis off on another.
CK0

Re: Circular Issues With Canon RF 15-35mm 2.8 taken on Canon R5

justadude — Sat, 17 Feb 2024 14:45:51 GMT

I usually keep a UV filter on my lenses, but I always take them off for long exposure shots, especially at night. Sometimes I get very faint reflections between the lens and the filter from any light source, including reflected moonlight... especially on the less expensive filters.