Polar Pro 77mm Neutral Density + Polarizer Quartzline - ND64 Category_Tripod Collars you can use them in

you can use them in the rain

connect each monocular's end to make a 16X telescope

rail mounts and integrated quick lock release attachment points for instantly latching onto the quick release plate without removing the shoulder pad

For high quality black and white photography

secret space on the deep web

Polar Pro 77mm Neutral Density + Polarizer Quartzline - ND64 Category_Tripod Collars you can use them inNeutral density + polarization filters, or ND PL filters for short, are a unique type of camera filter that combines two popular filter effects together into a single glass element. ND PL filters combine a polarized glass element with a neutral density coating of a specified strength for slowing shutter speeds with improved contrast and color saturation. Features Fused Quartz Glass Element Resolves up to 400 megapixel sensors Brass Frame Smooth