I use filters rather rare and have therefore gained me my entire filter in 77mm, through these rings, I can now use the filters on lenses with a smaller diameter, the rings serve their purpose, the threads are cut cleanly so you do not worry they need to screw on lenses. Nevertheless, I recommend everyone to examine the rings once before, I was lucky and my rings are fine, but at this price suffers quality control, drum look even before it unscrews and should be on a resistance come under no circumstances continue to turn, it is advisable the rings once (as in the picture) towards each screw, so you can be transported more easily and they have been tested before.
