Purchased about two years ago and used twice. I was satisfied with the performance, but I no longer use it because I no longer have any 72mm diameter lenses. --- 72mm Variable ND Filter - Filter Size: 72mm - Filter Type: ND Filter The case is not the original one. The following is quoted from the manufacturer's direct sales website: --- ND64-1000 Variable 72mm ¥11,900 The usage range is for shooting from standard to telephoto, and is intended for shooting that does not require high quality, and for video shooting. Although it is a product for beginners, it is a variable filter mainly made for landscape photography, so it is less likely to have unevenness compared to other variable filters. Depending on the ND effect, X-shaped unevenness or a bluish tint may occur from the wide-angle to the standard side. Also, the slow shutter speed may be affected by the reverse incident light from the viewfinder. It is necessary to take measures such as closing the eyepiece shutter before shooting. For those who want to enjoy shooting in earnest, we recommend square ND filters and single-effect filters. - Uses optical glass B270 - Maintains high filter flatness accuracy with ultra-precision polishing on both sides - Oil-repellent, waterproof, and dustproof functions - Generally, the stronger the light reduction effect, the stronger the bluish color tends to be, but this is a high-quality variable filter that suppresses the bluish color. In addition, it is usually said that it is difficult to achieve a well-balanced light reduction effect over the entire screen, but this product achieves it at a high level. - KANI ND filters are characterized by their low color cast. The color balance is also constant, making it easy to use. Front filter thread: 72mm (lens cap, filter, etc. can be attached)