The designations for the Optivisor are as follows:
Each unit comes with one lens. Other interchangeable lenses are available. In this table, Pwr = magnification power and FL = focal length. . No . . Power. . FL . .2 . . 1.50 . . 20" . .3 . . 1.75 . . 14" . .4 . . 2.00 . . 10" . .5 . . 2.50 . . .8" . .7 . . 2.75 . . .6" . 10 . . 3.50 . . .4" I have the 3 & 5. I use the 3 for most work. Palmer Byrne W7NMD _____ From: Wayne Conrad [via Elecraft] [mailto:[email protected]] Sent: Tuesday, July 19, 2011 9:13 AM To: pcbyrne Subject: Re: OT - Magnifier lamp I'm with those who prefer head-mounted magnification. I built my K2 while wearing an Optivisor: http://www.doneganoptical.com/optivisor.php It looks as though it would be uncomfortable, but looks are deceiving. It is light and the head band is broad and soft. I wore it for most of the three weeks I took to build my K2 with no discomfort. Magnification factor: Beats me, but the lenses are marked with a "5"*. I doubt that means 5x. Perhaps it means 5 diopter. Mine also has a loupe that swings down over one lens to add an additional 2.5x. I only used the loupe to read the writing on the smallest capacitors. Here's the loupe: <snip> ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
