Canon EF-S 10-22mm vs. Tokina 11-16mm -> FIGHT!

[neuroanatomist]

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).

[DJ 86]

, not able to reach on any conclusion.and what about the vignetting caused at 10-13mm with regular CPL(instead of slim)?
now, even if i get a slim CPL, i wont get better polarising effect below 15mm, so i can save money by getting a regular CPL than a slim version.

[neuroanatomist]

...what about the vignetting caused at 10-13mm with regular CPL(instead of slim)?
now, even if i get a slim CPL, i wont get better polarising effect below 15mm, so i can save money by getting a regular CPL than a slim version.

Get the regular version, unless you plan to stack the CPL onto another filter. In my previous testing, the 10-22mm @ 10mm could handle a B+W F-Pro + XS-Pro stacked (8.4mm, which is thicker than the standard CPL at 7mm), with no mechanical vignetting.