My problems with the Beattie fresnel occurred with wide-angle lenses. If most of your work is in the normal to long range then it may be helpful. Bob Younger On Sat, Sep 8, 2012 at 6:32 PM, Myron Gochnauer <goch@xxxxxx> wrote: > With a Toyo lupe (8X?) it seems easier to focus than with a coarse GG. > I've heard that brightness and "contrast" or ease of focussing are > inversely related, but at least with relatively high magnification, the > Yanke GG seems easier to focus. With the Toyo, the fresnel lines are > visible, but not very prominent. > > Myron > > >