Quote Originally Posted by DJ 86 View Post
hello everyone!
after a small survey i found that a CPL for UWA lenses created variable intensity colour patterns in sky. i wanna know what can be a solution for this? as i have already been using CPL on my sigma 17-70 which gives very good results with help of CPL and wanna do the same on canon 10-22 also
The only real 'solution' would be to change the laws of physics. Good luck with that.

A CPL does fine on your 17-70mm because the uneven polarization is generally a problem starting at 24mm and wider on a FF camera, meaning 15mm and wider on APS-C...your 17mm isn't wide enough to have the issue, the 10-22mm will be (although it should be ok in the 15-22mm range, which is another solution, of sorts). You can minimize the effect by shooting with some clouds in the sky, altering the angle of the shot relative to the sun (which, of course, will decrease the strength of the polarizing effect along with the uneven polarization artifact).