Thickness: 1.0mm Upward: 0-15 degree
Focal length: -330mm Side: 0-28 degree
Groove pitch: 0.5mm Down: 0-30 degree
Model: EF-ND-A
Size:225*
305mm Weight: 90-95g
Model: EF-ND-B
Size:185*
255mm Weight: 50-60g
