I've had a weird issue showing up recently, I've been having thick blue lines showing up in some of my shots, I've been told by some folks on Reddit that it's banding noise, I've chatted with Canon about it, they thing I should send it in. But if this is just a common issue, and sending it in for service isn't going to do anything I'd like to save myself the headache, and the loss of time with out my camera. Have a look at the image that I've attached to the post, I'd love some advice.
It was shot on a EOR R, 6 second exposure, F1.8 at ISO800
The "artifacts I'm referring to are in the bottom right hand side running vertically
any and all help is much appreciated.
Looks like the dreaded canon sensor banding noise to me unfortunately.
Test: take a 1 or 2 minute frame with the lens cap on. Now take that black raw into camera raw (or lightroom, or whatever processing software you have) and max the exposure slider all the way up, and blacks. Noise should appear; this is your sensor noise... see if it matches the noise/banding in your photo; very distinct, like a fingerprint.
There is no "fix" that I know of, it is just part of the sensor, and all sensors do it to varying degrees. Canon is typically striped-banding, Nikon is sometimes a purple gradient on the bottom of the frame.
A work around is to get more light onto the sensor, so I'd try different exposure settings. Bring more light into the camera and sensor, and if you have to, bring the exposure down in post (instead of up).
To fix a shot that already has the banding you could try the brush tool in camera raw (or lightroom) and use the moire reduction. Just use a light hand.