One day after using my Canon EF 28-70mm f/2.8 L USM Lens, I noticed that every photo has a huge amount of glow in the dark areas near any light area.

I tested my other four lenses to figure out if it's the lens's or camera body's fault. The other four lenses work fine without the glow problem.

I examined the problematic lens, and there seems no visible dust (observing front and back side of the lens).

Here's an example:

enter preformatted text here

  • 5
    I just want to be sure: do you have a protective filter on that nice lens?
    – mattdm
    Jan 8 '13 at 13:24
  • What aperture did you shoot this at and were the other lenses as fast?
    – Robin
    Jan 8 '13 at 21:13
  • I'd check to make sure that there weren't any grease 'smears' on the front or back elements. It's also possible, I suppose, that there could have been some internal condensation. Looks like the picture was taken someplace warm... Any trips to hotter/colder climates recently?
    – BobT
    Jan 8 '13 at 21:57
  • 1
    Maybe condensation/fog on the front or rear elements? Jan 8 '13 at 23:34
  • 1
    If it's doing this with the filter off (and with everything else seeming good as everyone has said) send it in for repair. I'm a bit surprised, though, because the filter seemed the most likely offender. I'd double-check the result without the filter if you haven't already. If you have, time for the repair center.
    – mattdm
    Jan 11 '13 at 12:41

If it isn't a condensation issue, and it is repeatable, it's time to send the lens to Canon for repair.

  • If you just stepped out of an air conditioned room you might have some short term condensation issue that creates these halos.
    – uncovery
    Jan 10 '13 at 10:30
  • i guess that's what i'm going to do next ! but i kind of don't trust this services.
    – armen
    Jan 11 '13 at 12:41
  • 2
    You don't trust the company that MADE the lens? Jan 14 '13 at 11:11
  • of course i trust the company that made the lens, but here in Greece the service employees are a bit far from the service idea ! ... if i was in Japan, now that's a totally different thing.
    – armen
    Jan 16 '13 at 8:15

the center doublet has some cement that gets cloudy when it breaks down. you need to find an independent repair shop that has a donor doublet that they can replace it with. its a common design flaw of the 28-70 2.8. repair should cost you $300-350. i had the same problem with the same lens. its not fungus. canon wont replace, as they dont carry spare parts anymore. time to make some phone calls.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.