![]() While the mirror is essential to viewing the scene and taking the photo, mirror dust will have absolutely no impact at all on your images. The first important difference between the dust that settles on your sensor and that which settles on the mirror is that only one of them will appear in your photos. There are steps you can take to minimize the dust (holding the camera with lens mount facing down while changing, not changing lenses outside, etc.), but sooner or later it’s going to find you. Once you start changing lenses, the likelihood of dust finding its way to your sensor skyrockets. Once inside, they can settle on the mirror or sensor. When using lower-end or budget zoom lenses, the simple act of repeatedly zooming the lens in and out can “inhale” dust particles into the lens, which can then over time work their way into your camera. And that’s before we even think about taking our cameras outside or changing lenses. Regardless of how clean your studio is or how lint-free your camera bags are, those microscopic makers of mayhem are going to settle on your camera at some point. The fact is that our cameras spend a great deal of time in dusty environments. Part of eradicating any enemy, however, first requires some knowledge of where he’s hiding and how he got there. ![]() We all know that’s not about to happen, so dealing with dust becomes a critical part of regular camera maintenance. The closest you might come to avoiding it would be if you were to put a prime lens on your camera when it’s brand new and never change it or take it off. You can try avoiding it, but the simple, unfortunate truth about sensor dust is that regardless of how careful you are, onto every sensor some dust will fall at some time. We all know that dust on a DSLR sensor can range anywhere from the mildly annoying to downright problematic.
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