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How to protect optical lens by classification of optical filters
Color filters are also called 'filters'. Optical glass devices that selectively absorb (or pass) light according to different wavebands. The optical filter consists of a lens ring and a filter, and is often installed in front of the camera or camera lens. Color filters for black and white photography are mainly used to correct the color sensitivity of black and white films, adjust contrast, eliminate interference light, etc.; color filters for color photography are mainly used to correct the color temperature of the light source and compensate for colors.
Optical color filter, this special optical glass device, is usually made of colored optics or colored chemical film. When using it, install it in front of the lens or behind the lens, and use it to adjust the tone and contrast of the scene, so that the tone of the scene captured by the lens is similar to the degree of the optical lens felt by human eyes, and it can also be used through color filters. Obtain a specific artistic effect. Color filters are widely used in photography creation, printing plate making, color photography and magnification, and various technical photography.
glass laminated color filter
glass laminated color filter is made of two pieces of colorless glass sandwiched by a layer of colored adhesive film Combined. It has the advantages of high transparency, more grades of pigments made by chemical methods, high absorption and passing capacity of various shades, and easy wiping and storage. However, the glue film between two pieces of glass, if it is damp or shocked, will easily cause the lens to open or deteriorate; if the two pieces of glass are bonded together, the thickness is large, if the glass is not well ground, it may also cause the focus of the lens to change and affect the lens. Design the clarity of the ringing image.
Weak color filter
Weak color filter can only absorb ultraviolet light and a small amount of blue-violet light, and all other colors can pass through , The absorption power is small, and the pass rate is large. The use of this color filter generally does not affect the exposure, and is mostly used when the illumination is weak or the subject is moving fast.
Neutral color filter
Neutral color filter can absorb most of the blue-violet light, the absorption power is large, the pass rate is slightly small. Compared with the tones of the photographed scene, the tones of the captured photos appear natural and moderate, achieving a more ideal effect. When shooting landscapes, flowers, snow scenes, buildings, outdoor portraits and still life, neutral filters are often indispensable.
strong color filter laser lens
strong color filter can absorb all blue-violet light, and can only pass through the required part Shaded light, great absorption, very low pass rate. Compared with the hue of the shot scene, the tones of the photos taken have a strong contrast, and the adjustment of the scene color goes beyond the natural state. Using it to shoot distant scenery can eliminate the haze in the air perspective and make the distant scenery exceptionally clear.
Various color filters have the functions of absorbing, passing and blocking various light in the spectrum. If the light is absorbed less, the amount of light will be greater, and the exposure on the negative film will be more and the density will be greater, and the shadow will be light on the photo; if the light is absorbed more, the amount of light will be less, and the exposure on the negative will be less and dense. Smaller, the tones expressed in the photo are dense. When the high-power laser lens group absorbs all the light, the amount of light passing is equivalent to zero, and the negative film cannot be light-sensitive, and its density reaches the degree of transparency, and the picture becomes dark.
Many people who love photography like and love SLR cameras, and the most important part of the camera is the optical glass. Protecting the optical glass is the most important thing when using the camera. It's up, so how to clean and maintain our cameras and lenses in daily use, it is recommended to use professional optical glass cleaner and optical lens lens cleaner, because professional optical glass cleaner and optical lens lens cleaner are easier to clean and clean. Cleaner, will not damage the lens, optical lens and sensor.
, let’s explain to you what little tricks can better protect the optical lens when using a camera with a daily mirror.
1. Turn off the camera before changing the lens. This will reduce the electrostatic charge on the sensor and reduce the risk of attracting dust.
2. Keep the rear lens cover and the camera body cover clean and free of dust.
3. Don't let the camera lens mount open for too long. When removing the lens, cover the camera body or change the lens immediately;
4. If possible, only change the lens in a dry environment;
5. When changing the lens, point down to the lensmount to prevent dust from falling into the lens;
6. Keep your camera bag clean. Completely empty your bag daily and use a vacuum cleaner to remove dust and dirt.