These do exactly what you need them to gets weird when you need to convert something really far down to something really far up but that maybe not what it’s mean for. I have filter threads that are 50-60mm and the filter i use is 87.
03/03/2020
I have read earlier reviews of these adapter rings, some quite negative. However, if you do what is necessary to make sure they are lubricated properly, these rings are top notch; Each ring, when you first receive them, must be dry-silicone lubricated(not mineral oil, as it will collect dirt and dust) on all threads, by unscrewing each carefully, patiently, and using a Q-tip, on each set of threads. When you screw them back together, you MUST turn the ring 'counterclockwise' until you feel the ring 'drop-in' to the mating thread. Then, carefully continue turning the ring clockwise, to the end, but do not tighten like a lug nut on a car wheel, just 'snug' it together. These are well-made rings, and I had zero cross threaded from the factory. They work great!!
03/02/2020
I just wish I had bought these sooner before I had purchased about eight different ND filter and polarizes. These things are great!
29/12/2019