I ordered the gray filter, in order to make longer exposure times a day can: and that's what he's doing very well. The filter is very reasonable compared to B + W, but which stands for nothing. I could not detect any deterioration in image quality. The sharpness is great and is not adversely affected. The only criticism (for me but no one!) Might be the reddish, the mitsichbringt the filter, but the competition has also. Why this is not a criticism? I shoot in RAW format in general and the color cast can be corrected in seconds thus. For photographers who shoot in JPEG, the manual white balance however is essential if one wishes not tinted red. Since I do not belong to those, there are of me 5 stars.
