Q:Film SLR camera lens on the aperture ring is how to use it?

The shutter can not be pressed. The The Exclude the cause of a mechanical failure. Some film cameras must be put into film to move the shutter.

Q:SLR camera lens where there is water mist, is the damp it, how to solve!

The water mist is a moisture that contains warm air to the cold lens, which condenses on the lens surface. Put the lens in the oven for a day and a night. If you still can not be removed to the maintenance point to see, it is not a mist.

Q:What is the meaning of the medium focus in the SLR camera lens?

The focal lengths of the SLR cameras are roughly divided into ultra wide-angle (fish eyes), wide-angle, standard, medium coke, telephoto, super telephoto, coke in general refers to the focal length of about 100mm lens, the most suitable for portraits.

Q:How do I know if the lens of the camera is glass or resin?

???This is because the glass thermal conductivity is much larger than the thermal conductivity of the chemical synthetic resin, while the human body's tongue is a high sensitivity temperature sensor. ????????Modern zoom lens in order to eliminate color, often use aspherical lens. The cost of grinding aspheric lenses with glass is very high. The use of resin is simple, direct injection molding can be. Therefore, the ordinary lens if you want to use aspherical lens, the general use of resin instead of glass. ????????From the optical performance, the difference between the two is very limited. But after long-term use, the degree of aging resin lenses than glass serious.

Q:How the camera lens is wet

outdoor:, A wading place, I put the phone and the camera with a condom, and then the mouth of a bar, throwing water in a few days and nights are no problem, you think, even the small tadpoles are not afraid to swim

Q:SLR camera lens how to see is not a constant aperture

1, constant aperture is certainly better than non-constant aperture, the price difference is great. Constant aperture volume is relatively large.

Q:Camera lens dirty, with sweat stains. How to remove the lens does not hurt it?

If it is SLR need to clean up the professional, and very troublesome, this lens is not naked to use, have to buy UV mirror. Wipe the wiping the more wiping the bad, entertainment card machine can directly buy deer rub

Q:Is the camera's lens longer and more expensive?

In fact the manufacturers for the use of convenience, do everything possible to make long short. So the short thick lens will be more expensive. Amateur telescope long, but you can weigh the weight to know, where there are few pieces of the lens, the general is also very fine. A 200mm f / 2 lens is not long, but the thick bowl of the diameter, making it worth more than thirty thousand yuan. Are talking about the vernacular, hope you can understand.

Q:Camera lens on the 5.0-60MM1; 3.4-5.9 What does it mean

Camera lens 5.0-60MM is the focal length of the lens: the shortest focal length 5.9 mm, the longest focal length 60 mm. 1: 3.4-5.9 is the lens maximum aperture: the focal length of 5.0 mm, the maximum aperture of 1: 3.4; in the focal length of 60 mm, the maximum aperture of 1: 5.9.

Q:How to use air blowing, lens pen, cleaning mirror cloth, cleaning mirror paper cleaning SLR camera lens?

If the time is long, the lens into the gray, it is only blowing on the line, when the first blow and then rub, the general lens pen on the line. Lens paper is not recommended, and stack bad will hurt the lens, you have bought so advanced things, not on the paper.