Talking about the type and function of lens filter

Abstract ： The lens filter is an accessory installed in front of the camera lens , Photographers use various lens filters to change the light or color entering the lens , Many of these effects are in post production , It is also difficult to copy . The lens filter can be divided into circles according to its shape 、 Square and rectangle . Different lens filters have different functions when taking photos , Such as UV The filter is mainly used to protect the lens . Next, this article will briefly introduce several types of lens filters and the functions of lens filters , Come and have a look with me ！

• There are several types of lens filters

There are many kinds of lens filters , There are also many ways to divide , Here, it is mainly divided by the shape of the lens filter ：

1、 Circular filter

 

A filter that can be screwed directly in front of the lens , Such as UV mirror 、 Polarizers 、ND Filters, etc . And the thickness of the circular filter also has a corresponding impact on the picture , The thicker the filter, the more halo , The thinner the filter, the less the halo .

2、 Square filter

Usually used with lens filter holder , The lens filter bracket is fixed at the front of the lens , Insert the square filter into the lens filter bracket to use . The advantage is that it can be applied to all types of lenses , This type of filter is widely used in landscape photography .

3、 Rectangular filter

Use the same method as square filter , Different from square filter , They have more room to move up and down .

Two 、 What are the functions of lens filters

Different lens filters have different effects , Here, take the four common filters as an example ：

1. UV Filter

 

It is mainly used to protect the lens , Suitable for any scene .

2.CPL Filter

 

Mainly to reduce glare , Increase saturation , Suitable for the sky in landscape photography 、 water 、 Plants, etc .

3.ND Filter

 

Mainly to extend the exposure time , Suitable for water flow in bright light 、 Waterfalls and other places .

4.GND Filter

Control the glare gradient , Reduce vignetting , Suitable for large scene photography with strong contrast , Such as after sunrise and before sunset .