This is a really good set of filters I have enjoyed using recently.I have a Sony camera with a 55mm thread and can vouch for all of the filters, lens cap and hood each being a perfect fit.The UV filter is now permanently in place as a lens protector and, thanks to the filters being double-threaded, further filters can be added. I have only briefly used the 'fluorescent light' filter as we no longer use fluorescent bulbs but I will appreciate this filter when visiting museums and public buildings which now seem to almost exclusively use fluorescent lighting.The 'neutral density 4' filter is just what I needed for photographing waterfalls and I had earlier planned to buy one costing almost as much as this entire kit of four filters (with extras).The filter used most so far, to date, is the circular polarising filter which is superb. I gave it a thorough testing yesterday in the Brecon Beacons to photograph clouds above the snow-capped mountains - see my three sample photos taken with and without filter below. The filter can be rotated to give the best effect, picking out the clouds and producing a richer sky colour. This is a filter I will be using regularly in my landscape photography, particularly for shots featuring clouds and water for improved saturation but also to help reduce reflections when photographing buildings with a lot of glass.Being February in the UK, I haven't yet been able to test the lens hood - sun entering the lens isn't really an issue at this time of year but I confirm that it is of a good quality and fits well.I am most impressed by this range of filters. Their quality is superb, they're slim, well made, strong and perfectly engineered to fit. In blind testing, I honestly couldn't spot the difference between these and those of several times the price by the 'top' manufacturer. I'm also pleased with the carrying case made from a robust, padded nylon fabric with deep inserts for each of the four filters which are securely held in place when rolled over and closed via the Velcro strip.There is nothing at all to fault, even for my critical eye, and I would highly recommend them.