If you have bought a piece of equipment that has cylindrical lenses listed as the lenses you should use with it, you are probably wondering what they are and if you can buy them custom-made? After all, you will need to have cylindrical len…

If you have not bought cylindrical lens from a Chinese manufacturer before, here are five things you can expect once you do. Exceptional customer service -- Many of the top Chinese lens manufacturers have English speaking staff that has be…