mirror: the daytime too large in some time, you will find with the smallest aperture and fastest shutter speed will still be overexposed;, or want to take some of the movement during the day, but because the brightness of the screen cause the shutter speed is too fast, and had it moving objects solidified.

This time you need is an ND mirror, gray mirror or referred by light microscopy, its role is to filter out part of the light, so you can slow down the shutter speed, and get the effect you want.

At night, we sometimes want to take some of the traffic light to pull off the track. As the vehicle speed is not fast in the city, at 30 km / h or so, so I want to pull out a long trajectory, then the shutter speed is basically to about 30 seconds before they can achieve satisfactory results.

BAODELI Bao Deli slim adjustable between ND lens can be adjusted from 2-400, frame quality imported hardened aluminum manufacturing, innovative design frame. Lens glass material imported from Germany, production, effective and accurate dimming, does not affect the clarity of the picture, for each color of light affect the average, effectively prevent the phenomenon hazy blur when shooting, true to the color characteristics of the scene itself. Green aluminum frame, with advanced turning technology, rotating feel strong. Compliance with international environmental standards ROHS.

Section by light microscopy adjustable ND, reducing the minimum amount of light exposure is ND2 minus a file, ND400 maximum exposure can be reduced 8 files!