topic Re: line down the photo in EF & RF Lenses

RF24-240mm line down the photo

dandolak — Tue, 10 Mar 2026 13:19:27 GMT

hello,

I'm noticing a light line going down the right side of my frame on the photos. using a canon r8 and canon 24-240.

I know there is a strong vignette with this lens, but there seems to be no rhyme or reason for the line. I've done with and without a filter. I do see more close to the 24mm length.

thoughts?

thanks,

Dan

Re: line down the photo

SignifDigits — Tue, 10 Mar 2026 01:42:43 GMT

This is happening on every photo? Do you have another lens to try? If so, please try that to see if you can narrow it to the body or lens.

Barring that I would recommend visually inspecting the lens front (zoom it out and look down to the aperture blades). Should be clear of anything. Then the back of the lens. Then the camera sensor. It should be free of any material. It almost looks like a hair on the sensor on at the back of the lens. Do NOT touch the sensor but you can blow it off with a lens blower bulb with the camera facing the floor. Same with the back of the lens. If there is a hair there perhaps you can get it out that way.

I'm sure there are more things to try - resetting your camera comes to mind - but that seems like a reasonable list to start with. The R8 should be cleaning the sensor when turning it off, but you can also try cleaning it via the menu.

I've always sent my cameras in for any more extensive cleaning of the CCD sensor, so I will not venture into that topic other than air and the camera cleaning function.

A faulty LCD display would typical have a perfectly nice 1-pixel wide vertical line, and not the blurry angular line you're seeing. A bad row of CCD (charge-coupled device) pixels would mean installing a new CCD. is there any way that your lens was off and the CCD could have been damaged?

Re: line down the photo

shadowsports — Tue, 10 Mar 2026 02:41:14 GMT

Greetings,

Agree. Need to test with another lens. If it's in every photo, I'll bet there is something on the sensor.

Re: line down the photo

dandolak — Tue, 10 Mar 2026 08:32:19 GMT

Sorry i wasn't more clear. I have tried this with another lens, but do not see the line. So, I do believe it is lens related. Also, it is not happening on every photo, just more often at the 24-20 mm range.

I also keep a step up filter ring on my lens. I've just taken it off and back on, to see if maybe there is a light leak there.

thank you,

Dan

Re: line down the photo

dandolak — Tue, 10 Mar 2026 08:41:07 GMT

You were right. I took a magnify glass to the back of the lens, and there it was. A very light hair.

I guess it almost had become stuck to the back as i've blown it several times and wouldn't remove.

thank you very much for your assistance!

Dan

Re: line down the photo

SignifDigits — Tue, 10 Mar 2026 11:24:02 GMT

Glad you found it!! And you are most welcome. VERY glad it was NOT the CCD!!

Re: RF24-240mm line down the photo

ebiggs1 — Tue, 10 Mar 2026 14:50:59 GMT

"I guess it almost had become stuck to the back as i've blown it several times and wouldn't remove."

Sometimes static attraction can cause dust or a "hair" to become stuck. Generally not too difficult to remove but more that just casual attention. Aberrations like that are almost always a sensor thing and not a lens issue.

Re: line down the photo

justadude — Wed, 11 Mar 2026 14:11:27 GMT

"VERY glad it was NOT the CCD!!"

Not likely the CCD sensor since they have been replaced with CMOS sensors on modern cameras. (Just kidding around - we knew what you meant!) 😁
I do miss the colors on those older CCD sensors.

Re: line down the photo

SignifDigits — Wed, 11 Mar 2026 15:29:10 GMT

What can I say, like many of us here, I'm old!

Re: line down the photo

justadude — Wed, 11 Mar 2026 15:40:57 GMT

Me too, my friend! It gave me a laugh because it sounded like something I would say. For example, while I always say "ISO" for digital, I still say "ASA" when talking film speeds. Older photographers know what I mean, but I always get that look from the younger ones as if to say "What on earth are you talking about?"

Re: line down the photo

kvbarkley — Wed, 11 Mar 2026 15:52:24 GMT

"Me too, my friend! It gave me a laugh because it sounded like something I would say. For example, while I always say "ISO" for digital, I still say "ASA" when talking film speeds."

You could be really perverse and report it in DIN.

Re: line down the photo

justadude — Wed, 11 Mar 2026 16:00:11 GMT

You could be really perverse and report it in DIN.

Wow... I forgot all about that! I'd even confuse myself using that system. 😂