Originally posted by eerik Right eye and both open. Also learnt it from video shooting (semi-pro). Although wearing glasses makes it rather difficult.
I use this in some circumstances, as it's easier to check what's going on with both eyes open, but mostly when using lenses in the "normal" range.
However, without wishing to divert the thread too much, your note reminds me that wearing spectacles can be a real bugbear with most cameras. It would be good if manufacturers took a cue from some binocular makers, and introduced greater Eye Relief to viewfinders. I bought a pair of Eschenbachs some years ago, because they were good optically, but also because I don't have to take my specs off to use them. Pentax, in common with other optical manufacturers, should be well aware of this need, particularly given the growth of spectacle-wearing worldwide.