Delivery - Fast, punctual and safe packaging. The filter has its own box, in which you can safely go out into nature to take pictures. Have you ever tried photographing water in direct sunlight? Passing the waterfall and you want to take an amazing photo, but due to too much brightness your options are limited - believe this has happened to me many times, but with the K&F Concept ND filter the problem is solved. I'm an amateur photographer who loves spending time in nature and I think ND Filter is something you need to have in your gear as soon as possible. The ability to set how much you want to close the filter and thus get a darker filter is a great thing. The filter is mounted directly on the lens, just reject it (note the size of the lens!). You can still take it, it's not difficult and you get great effects with it! Long exposures without ND filters are a nightmare, and having ND filters in your pocket will be an amazing thing. Another thing I would recommend is the mobile app (there's more - just try) to calculate shutter speed using the ND filter. You can find the formula on the internet, but we have to use the technology correctly. I highly recommend K&F Concept filters! and having ND filters in your pocket will be an amazing thing. Another thing I would recommend is the mobile app (there's more - just try) to calculate shutter speed using the ND filter. You can find the formula on the internet, but we have to use the technology correctly. I highly recommend K&F Concept filters! and having ND filters in your pocket will be an amazing thing. Another thing I would recommend is the mobile app (there's more - just give it a try) to calculate shutter speed using the ND filter. You can find the formula on the internet, but we have to use the technology correctly. I highly recommend K&F Concept filters!