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Is my Canon 24-105 IS STM damaged?

Started Dec 18, 2018 | Questions thread
Lemming51
Lemming51 Forum Pro • Posts: 15,278
Re: Is my Canon 24-105 IS STM damaged?

lighthunter80 wrote:

  1. Are the front and back elements of the lens perfectly clean, free of fingerprints and oils?
  2. Did you use any type of filters like UV protection etc?
  3. Did you go to e.g. Flickr and research this lens for pictures taken into bright light sources and do they eventually exhibit rth same phenomena?
  4. Is your sensor clean which I don't think is the issue but better ask?

The odd flare also appears to be related to the aperture being stopped down.  Maybe the aperture blades are sticking or damaged.  Inspect by setting small aperture f/8-16, press/hold DOF Preview button and look in the front of the lens.

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