Precautions for the use of polarizer lens
1. There are two types of polarizers, linear polarizers (linear polarizers) and circular polarizers (circular polarizers). The method of use and the effect are the same; but circular polarizers can make light go through the filter in a circular direction instead of a linear shape, which is especially suitable for Camera with auto focus system.
When using a single-lens reflex camera, because a mirror is used in the camera, the circular polarizer can ensure the accuracy of focusing.
The cheaper linear offset may affect the autofocus of some cameras during use, so if you use a polarizer on a digital camera, you need to use a circular offset.
2. Polarizers are generally thicker. It is best not to use them with other filters, otherwise it will easily form black corners in the picture.
3. The polarizer itself absorbs about 75% of the light. If you use it on a cloudy day, or use a small aperture for fast shooting, it is best to stabilize the camera body with a tripod. Since digital cameras use TTL metering, there is no need to make exposure compensation due to the decrease in the amount of incoming light.