K&F CONCEPT 39mm Variable ND Filter ND2-ND400 1-9 Stop Ultra Low Reflection Multi-Coated Adjustable Fader Neutral Density Precise Light Reduction Smooth Rotation for Landscape Video Nano-X Series FN721

Ultra Low Reflection: With reflectivity controlled at 0.15%, it reduces ghosting when shooting backlit angles in high-light scenes HD Optical Glass: Each lens is finely ground to ensure sharp image quality without loss, delivering a high-definition viewing experience Precision Tuning: For video shooting, the push rod allows precise and quick gear adjustment, 360° smooth rotation, covers ND2 to ND400, and suits various scenarios MRC Featured: Adopted 28-Layer multi-resistant coating technology, the green coating helps effectively reduce filter surface reflection and the ghosting while making the filter anti-scratch, water repellent, oil and dust resistant No Vignetting: For the filter designed with an ultra-wide-angle design, the ultra-slim frame is only 7.4mm, no vignetting for photos beyond 19mm and videos beyond 17mm. due to the difference in lens type and focal length so this filter might be met dark"X" cross, this isn't the quality problem, it can disappear via rotating the filter