What are the specifications of SLR ND mirrors?

Single-lens Nd mirrors have a variety of densities to choose from, such as ND2, ND4, ND8, ND 16 and ND32 (once, twice and three exposures are required respectively), and can also be used with multi-lens gray-scale mirrors.

Diameter: 46mm, 49mm, 52mm, 55mm, 58mm, 62mm, 67mm, 72mm, 77mm, 82mm, 86mm, etc.

The SLR camera has only one lens, which is used for shooting and framing, and the parallax problem is basically solved.

When taking a view, the light emitted by the object is focused by the lens, reflected by the oblique mirror to form an image, and then reflected by the "roof prism" raised at the top. Photographers can observe the scene through the eyepiece, and it is the same image as the scene, which is convenient for framing and focusing.

Single-lens reflex camera can change all kinds of matching wide-angle, medium-focus, telephoto or zoom lenses at will, and can also be equipped with close-up lens, extension ring or telescopic leather cavity as needed. In short, any scene that can be seen clearly from the viewfinder can be photographed by the camera.

Maintenance and cleaning of the lens: the lens is the most critical and fragile part of the camera, so you should pay great attention to the protection of the camera lens when you use the camera at ordinary times, and don't easily get contaminated with dust, let alone let the lens be "dirty" by dirty hands. Only clean the lens when it is very necessary.

When cleaning, it is best to blow off the dust with a balloon or gently brush it off with a soft brush. If you encounter stubborn dust, you must gently wipe it with special lens cloth or lens paper. Remember not to use soft-looking paper such as paper towels to clean the lens, because these papers contain wood pulp that is easy to scratch the coating, which will seriously damage the key coating on the camera lens.