I am mainly using the circular polarizer on Tokina 11-16/2.8 and Canon 17-55/2.8IS. I just spent almost $200 on the slim version. But do I need a slim for those lenses, especially on the UWA?
Also does anyone know if the regular version has thread for lens cap? The plastic cap came with the slim version is not tight enough to hold in place safely. If the regular version has thread for cap and it works well with 11-16, I would probably exchange mine with it.