1. The Nd Filter Is Mainly Used To Reduce The Amount Of Light Entering When The Light Is Too Bright, So That The Camera Can Select The Correct Exposure Value And Avoid Overexposure. Improve The Color Saturation Of The Picture, Making The Picture More Transparent And Gorgeous. 2. Nd8/Pl Combines The Advantages Of Nd Light Reduction And Polarizing Lenses, Breaks Through The Limitations Of Traditional Filters, And Simultaneously Meets The Photographer'S Two Requirements For Extending Exposure Time And Eliminating Harmful Polarized Light. It Is A Powerful Tool For Landscape Photography. 3. Eliminates Harmful Non-Metallic Reflected Light, Increases Color Concentration, Deepens The Blue , White Clouds, Makes The Picture More Transparent, And Improves The Clarity And Expressiveness Of The Picture. It Is Also Often Used To Take Pictures Of Scenes Behind Glass, Clear And Transparent Water, And Underwater Objects. 4. Mcuv, Due To The High Color Temperature, The Proportion Of Blue Wavelength And Ultraviolet Components Increases, The Captured Image Will Be Bluish, And The Yellow And Red Will Be Underexposed. Using Mcuv Filters Can Effectively Weaken The Blue And Blue-Gray Tones Caused By Ultraviolet Rays, And Increase The Light Transmittance. Degree, Making The Picture Quality Clearer. 5. And Nd/Pl Are Adjustable Filters. The Golden Frame Can Be Rotated As Needed When To Achieve Satisfactory Polarization Requirements. Product Name: Filter Series Applicable Models: Air 3 B: ND/PL Filter 4-Piece Set: ND4/PL + ND8/PL + ND16/PL + ND32/PL Colour:As Shown Material: ABS Packing size: 11.5 x 10.1 x 2.4cm Package Contents: 1 x ND4/PL Filter 1 x ND8/PL Filter 1 x ND16/PL Filter 1 x ND32/PL Filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.