Ask: What is Cmos camera? Have with Ccd camera why to differ?
Answer: Cmos sensor is one kind compares Ccd sensor normally 10 times lower the sensor of speed. Because person eye can see 1lux intensity of illumination (the night of full moon) the following target, ccd sensor can see the eye that compare a person normally slightly fortunately 0.1~3lux, be Cmos sensor speed 3 to 10 times.
Ask: What is the physical meaning that light leak repulsion compares?
Answer: The blemish that designs by Ccd sensor causes light leak, every camera has sensor of a Ccd, as a result of the blemish of Ccd sensor, the strong light that enters Ccd sensor will penetrate counteractive layer produces exceeding video, what these do not need is video say to do pull light, ccd camera resists the ability of strong light calls light leak repulsion to compare.
Ask: What meaning does millimeter of F2.0, F3.4 represent? How I choose camera lens through these numbers?
Answer: F expresses the aperture of camera lens, f stops 2:1The focal length that shows scene with F3.4 millimeter is 3.4 millimeter. Camera lens F2.0 and F3.4~4 use the form of special economy, should this value is inferior, apply extensively at veneer camera, the aperture of the camera lens of F2.0 can collect the light of person eye half, the camera lens of F3.4 millimeter is in 1/4 inch the perspective that there is 60 to spend on Ccd, in 1/3 inch there are 90 degrees of perspectives on Ccd, be close to the perspective at person eye very much. Two eyes of person eye can include bigger perspective, resembling is sacred and clever design, from the person to the person commonly 150 arrive the angle of 180, but remember please, f stops and F focal length is the basic parameter of a camera lens only, do not represent quality. One has same F to stop to be able to compare the inferior scene that has same parameter with the high grade camera lens of focal length 100 times more expensive, consult next interlocution understands in detail please.
Ask: What is lowermost intensity of illumination? What is speed? What does 0.0001lux represent?
Answer: Lowermost intensity of illumination is a kind of method that measures camera speed, in other words, camera can see below much blacker condition practicable is video. But because do not have international standard of management, because manufacturer of every large Ccd has him,measure the method of Ccd speed. However one is tagged for (1lux, f10) camera can be mixed tag for (0.01lux, f10) camera just the same! ! ! Strange? Why?
Ask: What is colorless scroll?
Answer: When video camera uses processor of digital question mark to fall in fluorescent lamp, what can produce serious lubricious roll only is video. Video meeting becomes blue, pink farewell to arrive from white change white, circulate so. Because alternating current source moves in the problem that 50/60 hertz place poses,this is. White-hot bulb can provide stable light, and the light of fluorescent lamp because the intensity of alternating current and colour fluctuate in commutation with the speed of 8.3ms. Traditional camera computation gives white balance to need 100~150ms (0.1~0.15) , slower than alternating current 8.5ms, because this can never be caught up with. Right current and video be clear that through ability of 8 total cycle time landed add lustre to rolls.
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