Red & green outlines in photos

[Jzero]

Hello - I am new here and thanks for having me.

I am having problems getting good focus with my 5D Mk II and I have just noticed that there are green outlines on left of objects and red on right edges. This occurs where there are strong contrasts especially between dark and light colours.
I am using a 24-105 mm 1:4 L IS USM lens.

What could be the problem please?
Feeling devastated.

[kvbarkley]

IS has nothing to do with focus. It simply moves the image around on the sensor to compensate for lens movement, as determined by internal aceleration sensors.

CA is a problem anytime you have a non-flat piece of glass. It is the same reason prisms can split light into a spectrum.

[ebiggs1]

"The lack of sharp focus makes me think the IS isn't working."

That is really is no indication.  IS doesn't make a lens any sharper. It makes you sharper.  I believe your only recourse is to have someone, Canon, check it out as you will always think something is wrong even if it isn't.

[Jzero]

Yes I will get it checked. Only way to know.
Thanks 🙂

[shellbo6901]

Ive been having alot of purple and I can fix it in PS, although not so great at times, but all its dong r removing those colors from the entire photo. That results in 1.) then I very light(white) halo instead, which isn't the worst, but 2.) removing color from places you dont want. What can be done so it doesn't happen to start with? Seems like its just, not shooting where theres alot of dark to light(possibly more so near the outside) or zooming in. Im using an EOS R, but Ive never had a problem with past cameras, so I thought I may just be photographing badly 😞

[kvbarkley]

What lens? It should be corrected on the R.

[shellbo6901]

EF 50mm 1.4 & EF 17-40 f4L but it’s even on my kit lens which is why I think it’s just the type of photography I’m doing

[ebiggs1]

Show us a sample photo.

[kvbarkley]

Are you using the Canon adapter?