Does anyone recall seeing a remote focusing device for the 23? Several years ago (possibly 14 or 15) I saw one demo'd at a Calument show in Chicgo. I don't know the name of it and never thought I would like to even look at one. As I get older it seems that my arms don't reach as far as they use to and sometimes, when releasing the focusing knob, I tend to turn it just a fraction from the best focus spot. Any suggestions?