【Variable ND and Polarizing Filter Integrated】This 82mm filter kit (filter body + magnetic lens adapter set) - the H&Y HD Evo-series ND3-1000+CPL Filter Kit - is a 2-in-1 filter that offers both variable ND filter light reduction and polarizing filter reflection adjustment, with two mounting methods: magnetic mode (magnetic attachment/detachment) and screw-in mode. 【ND3～ND1000 Adjustment Range】The adjustment range is approximately 1.5 to 10 stops, providing the effects of ND4, ND8, ND16, ND32, ND64, ND128, ND256, ND500, and ND1000 ND filters, plus CPL (※only when using magnetic mode). It's suitable for various situations, such as video shooting and landscape photography where you want to reduce the shutter speed, or portraits where you want to open the aperture. 【Two Selectable Attachment Methods】By screwing the filter directly onto the lens without an adapter ring, you can use the screw-in mode, which functions as an ND3-1000 variable ND filter. Attaching the included magnetic lens adapter [ELA] to the lens allows for magnetic mode, enabling instant attachment/detachment and exchange, functioning as a variable ND + CPL. 【Operation】Magnetic Mode: Rotate the central knob to adjust the reflected light with the PL filter, and rotate the outer ring to adjust the ND density. Screw-in Mode: Rotate the outer ring to adjust the ND density. ※Due to the optical characteristics of variable ND filters, unique unevenness may occur when using high densities with wide-angle lenses. Also, because the adjustment knob is fixed, it cannot be used with bayonet lens hoods. I purchased this new, but I'm selling it because I don't use it much. It's almost like new. Returns, refunds, and cancellations are not accepted after purchase. Please understand this before purchasing. Thank you.