K&F Concept ND Filter Set 58mm ND8+ND64+ND1000 Filters, approx. €35. As a hobby photographer, and even more so for astrophotography, I naturally need a sturdy tripod, for example, to be able to take long-exposure shots at night with the mount. Until now, I've been lacking strong ND filters for daytime use. K&F offers a set of three in a slim mount for relatively little money in this segment. The three filters ND8, 64, and 1000 are delivered in a foldable bag. The filters can also be easily screwed onto an existing skylight; the thread dimensions are precisely adhered to. The packaging includes three wet cleaning wipes. I conducted the test with manual settings on my Fujifilm X-E2. Set it to f/22 and set it to 1 second using the Rollei remote shutter release in bulb mode. As you can see, the first image without the ND filter is completely overexposed. ND8 at least shows an overexposed sky, but ND1000 is the end of it, or rather, as expected, deep night. Only at F10 and 30 seconds did I finally get a clear image again. Of course, I could have shot the ocean—had there been one nearby—or a stream with a long exposure, but with today's sunny weather, wind turbines are a change, aren't they? :-) In the oblique light, I couldn't detect any optical defects or inclusions on the filters. Conclusion: For the money, including the filter bag, I give them 5 stars.