Bought a cpl filter recently by kenko pro1 digital..
I noticed that the surface of the lens does not seem to be mirror smooth.. It actually seem to be uneven fairly consistently all over.
I thought since filters needs to allow maximum light thur without altering their original path, they need to be glass or mirror liked smooth...
I am wondering if I was sold a faulty piece. To be fair, I went thur their entire stock of tokina cpl and all of them does not look flawless.. All have spots which was unable to be clean off with the soft cloth. After which they showed the kenko one in a very old case and sold it to me 60$ off the tagged price.
I hope I am not taken for a ride. Hopefully someone with more experience and share some tips on what to look for so consumers can make the right choices.