the quality of these filters seems to be on par with others (more expensive ones). The course is clean and evenly straight. The very well thought-out pockets, with their pull-out tab, offer fingerprint-free handling. Clear purchase recommendation on my part...!!!

A mild light reducer. Can be easily plugged in together with other medium-strength ND filters. Quality like other manufacturers offer. Good optical glass.

bought the filter bag to have all the filters at hand more quickly and not to have to search for them, and to save space. The bag is of high quality and fits perfectly for 100x100mm filters. A total of three (theoretically four) different filters can be stowed in it. So it is perfect for a standard ND filter set (8,64,1000). The inside of the bag is completely lined with microfiber so that the filters can be transported in it without additional protection. As a smart feature, it has a pull-out mechanism. This means that if you open the bag and pull the tab, all the filters are offset and highlighted so that you can grab them much better and read the name directly. I bought another glass filter at the same time - ND64. Since I already own an ND8 from another brand and the ND1000 from K&F, this was of course still missing in the series. Overall, I am super satisfied with the quality of K&F. The filters (update 2020) have almost no color cast anymore. In certain light situations, my ND64 filter turns green. However, this can be corrected without major problems during image processing. The shape of the filter (no round filter) also means that there are no problems with vignetting or falling sharpness. The images are therefore almost unaffected in terms of image quality. The processing is top (no sharp edges, stains, etc.) and the price speaks for itself. All in all, I'm very happy with the entire filter system from K&F and will probably get hold of the gradient filters soon!

am a passionate landscape photographer as a hobby and have now switched from the screw filters to this rectangular filter system from K&F. The screw filters were all fine, but you don't have the option of attaching a graduated filter to the ND filter in order to achieve even nicer effects. It is mounted on the lens using so-called adapter rings, which are included in the most common sizes for lenses. After attaching the adapter ring to the lens, the filter holder is attached. This is secured by a small lever (spring-loaded) and later released again with this. Now you can slide the filter plates into the filter holder. This lifts a bit severely but it should also hold and must not wobble. It is also important to observe that the filter used is close to the lens so that no more light can penetrate between the filter and the lens, which could possibly ruin the recordings. In terms of quality, the system makes a good impression considering the price. The only thing I noticed negatively is that the filter holder has some play after it is placed on the adapter ring and why there is no adapter ring for a 55mm filter diameter in the set, I also ask. 55mm is a common diameter for lenses. I can highly recommend the K&F system for amateur photographers. The professionals will probably use filter holder systems from other manufacturers, but they also cost a lot more.

The filter comes in a nice protective packaging and arrived in perfect condition. It is well made and represents a very good value compared to more expensive options/brands. From my testing, the filter density is near/exactly 10 stops. There is a noticeable, but moderate blue color cast with the 10 stop, which can be corrected in post. I did not notice any loss of sharpness.

have had this a while now to go with the appropriate adapter kit and holder. This filter is seriously well made and I cannot wait for the opportunity to get out and try it when the current pandemic allows us to move freely where we will

My Tiffen 100mm filters are a thicker, and do not fit in the holder. K&F's fit well, but I can't inset my Tiffen Pro Mist into this device. Otherwise works okay.

Loving this filter! Fits perfectly in my holder and greatly reduced the amount of light pollution and makes the stars really pop. Highly recommended it to anyone looking to bring out their astrophotography

Merci reçue et satisfaite!

These filters work, especially in areas rich with sodium/mercury vapour lights, but don't expect total cancellation or miracles. It does help bring out details and colours in the night sky, but it isn't quite the same as a Optolong or STC LP filter. Mine has scratched easy and I'm very careful with my equipment. I use a Mindshift Filter Hive with plush sleeves and it has still scratched.