B&W CPL filter differences (KSM, EW)

[criza]

Personally, I have Käsemann CPLs in both 77mm and 82mm sizes, in the Slim mount.

Is there any special reason you are using slim mount CPL filters, and not the regular ones? Thanks in advance.

[neuroanatomist]

Is there any special reason you are using slim mount CPL filters, and not the regular ones? Thanks in advance.

Reduced likelihood of vignetting. With some lenses, it doesn't matter, but with others, it does. Sometimes I'm in a hurry to catch a shot, and I just stack the CPL on the UV filter already on the lens, instead of swapping them. I'm not bothered by the lack of front thread on the CPLs, I only mount them when I'm using them so no need for a cap.