Genial 7 128 6 64

I use this filter to illuminate running water or clouds by day longer can to photograph a soft, flowing feel. To use come a Nikon D3100, the Sigma 18-250 mm F3.5-6.3 DC Macro OS HSM lens (62mm filter thread) for Nikon lens mount, and of course a tripod.
For my purposes, these filters are excellent, as they'll also be combined without changing the lighting atmosphere. The build quality is good, and they can be easily attached to the lens and remove it.
For not even 7, - you get very nice accessory for long exposure. As a small bag and a cleaning cloth is included, you can not assign enough star really!
For the ambitious amateur photographers highly recommended!