Monitor the important parameters of the lens
F value = f / D (f: focal length, D = lens aperture) depth of field refers to the camera lens focus is completed, in the focus before and after the range can form a clear image, the distance range, Depth of field.
In order to make the megapixel camera the best performance, it would be important to use a high-quality megapixel lens, so the quality of the optical image is a key factor in the overall image quality. Megapixel lenses provide high contrast, sharpness and sharpness for the entire image. Rather than megapixel lens can not fully show the megapixel sensor high resolution, especially in the edge of the picture.
Day and night cameras are generally used in the night near infrared or infrared environment. If you use a lens without IR correction to match the day and night camera, the camera will not be able to focus clearly when used at night. EVETAR lens with glass lenses supplemented by special optical design and multi-layer coating to reduce the refraction of light to achieve day and night confocal. As a result, the camera does not need to be re-focused when used at night. CCD and CMOS image sensors use pixels arranged in a two-dimensional grid. These pixels convert the optical image into an electronic signal. The number of pixels on an image usually determines the resolution of the image, and more pixels mean higher resolution. Million pixels is one million pixels. While the megapixel camera is a megapixel camera.
