It is with some reservation that I open this topic, but I would like some clarification on terminology, and where better than to poll this forum?
I have looked up lots of references to do with, in particular, Circular Polarisers - I fancy I know a bit about Linear Ps, which I have used a lot - only to find that many of the explanations seem to falter at the critical point of explanation. I'll summarise my gleanings to help. They are few but...
1) Circular Ps are required instead of Linear Ps in modern cameras so as to allow their AF and metering to work properly. (Took a few articles to find out why, but OK.)
2) A Circular P is made up of a Linear P and an integrated "half-wave" plate. OK, this helps make it work as a "Circular" P.
3) A circular P is actually a minsnomer because it DOES NOT polarise light "circularly" - a fast becoming disliked word, which I'll shorten to ccly.
At point 3) I start to lose the idea, ESPECIALLY, when the directions "left-" and "right-" "ccly polarised" add to the blur.
So, can someone set me straight? Can someone even refer me to an (even arcane would be acceptable) illuminating article on the topic? Please don't say Wikipedia as I've looked at their several references. I've gone about two pages into a Google search headed "circular polariser".
Thanks in advance. Am.