Obviously, with a big expensive piece of glass like a camera lens, dropping it is not a good idea. Your other concern with a lens, though, is keeping it clean and scratch-free. In the previous section, I mentioned the possibility of dust getting in the mirror chamber of the camera. If the dust alights on the sensor, then you'll see visible smudges and smears in your image. Most sensor dust is actually delivered to the inside of the camera by the end of the lens, so one of the best things you can do for your camera and lens is to keep the lens clean.
WARNING: I Repeat...
when you remove a lens, put the end cap on immediately!
Don't put a lens in a pocket or bag without an end cap. The end of the lens will trap a lot of dirt, and when you next mount the lens on the camera, you'll transfer a lot of this dirt and debris to the inside of your camera. To keep the ends of your lens clean, use a blower brush to blow any visible dust off of the glass at either end. You can get a blower brush at any camera store.
If there's something on either end of the lens that you can't get off with a blower brush, then you can resort to a lens cleaning cloth of some kind, which you can find at any camera or eyeglasses store. Don't ever try to clean your lens with your shirt or a piece of "found" cloth. While the cloth may look clean, you never know if there's some small abrasive particle that could scratch your lens.
Image stabilizer Auto focus
Use a blower brush for cleaning dust off the ends of your lenses.
One of the best things you can do to ensure the long-term health of a lens is to put a protective filter on the end. A skylight or UV filter will not alter the light that passes through the lens, but will provide a significant amount of protection. If the filter gets scratched, you can simply replace it. Even in the event of a drop, a filter can absorb a lot of the impact that would normally smash up the front of the lens.
When shopping for a filter, spend a little more money and buy a multicoated filter. Multicoated filters have special chemicals on them that reduce flare and reflections and other image-damaging phenomena. If you've spent a lot of money on a lens, don't hobble it with a cheap, low-quality filter.
Was this article helpful?