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Projectors are one of the commonly used equipment in our life and work, and are widely used in meetings, speeches, education and other occasions. However, if you encounter a projector automatic iris failure, it will affect its normal use. This article will describe some workarounds.
In front of the camera's lens, a full-spectrum lens film is built-in, driven by a microelectronic motor.
IR-CUT double filter refers to a set of filters built into the camera lens group, when the infrared sensing point outside the lens detects the intensity of the light, the built-in IR-CUT automatic switching filter can automatically switch according to the strength of the external light, so that the image achieves the best effect. This means that the dual filter automatically switches filters day or night, so you can get the best possible image day or night.
The earliest lenses consisted of only one convex lens, which was the best structure and the worst
SLR lenses generally contain five parts: lens, aperture blades, zoom ring (no prime lenses), focus ring, and distance scale.
