I am eager to test this filter immediatly. First of all it is thin and seems well built. Laying on the lens is easy, however I highly recommend deffectuer this by ensuring it does not fall. It is provided with a double thread thereby possibly add another filter. The ring is very mobile and smoothly. The result is immediately visible in the viewfinder. It is well protected in its box I might find a bit oversized, and with some slight closure. After developing my tests, I have not found in the agrandissants distortions or chromatic aberration. For the price it is excellent value for money for amateur use.
