Roger Cicala posted an interesting article on PetaPixel. You know that pesky dust spots you see in your Canon lens? Well, they are not really a problem, as Roger states:
Here’s a question I get asked about 15 times a week: “How can I get the dust out of my lens?” The right answer is you don’t. All lenses have dust in them and it doesn’t affect the images at all 99% of the time. Even if you clean it all out, it will be back after you use the lens a few times.
However, there are some situations where you really want to open the lens and get rid of the dust. Be aware that opening a lens voids guaranty, and that it is a potential risky affair. Be sure to read the warnings before you proceed. The following Canon lenses are covered in the article.
- Canon 17-55 f/2.8 IS(Canon 24-105, 24-70 f/4 IS, 24-70 f/2.8 II)
- Canon 85mm f/1.2 L
- Canon 85mm f/1.8 (Canon 100m f/2)
- Canon 70-200 f/2.8 NON IS (Canon 70-200 f/2.8 IS I and II)
- Canon 100-400 IS L (Canon 28-300 IS L)