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Much like real soldiers, the smart sniper keeps his equipment in tiptop shape as a way to gain an edge on the enemy. A soiled and dirty rifle will affect its accuracy and efficiency. Regular cleaning with the Airsoft sniper rifle is crucial, in addition to another weapons he carries. Buy a proven Airsoft gun cleaner like a silicone spray and use it every 2000 to 5000 shots. Therefore, when shooting in macro, it is easy to get a shallow depth of field if utilizing a large aperture. We often make use of the F8, F11, F13 such small, and medium-sized aperture to look at photograph to ensure the photo has clear range. If you use a 100mm macro lens to shoot the insects' close-up, even with the F13 aperture, the depth of field is extremely shallow, and sometimes need to utilize the manual focus function to carefully adjust the focus position to spotlight your eyes of insects to make the image more vivid.