On Sun, 20 Aug 2017 17:11:08 -0500 OK Don via Mercedes <mercedes@okiebenz.com> wrote:
> I think we are at 85% - will walk out to the runway for absolutely clear > viewing. In what I thought was going to be a clever experiment, is cut > up the lens of a viewing filter and stuck it onto the rear filter > element in my 500mm reflect lens, then pointed it at the sun, thinking > I could take cool digital photos. Nope - in about 5 seconds, a hole > melted in the center of said filter. The nodal point of that lens must > be at the filter plane. Use your telescope to project an image onto some card stock. I watched a partial eclipse at Hughes Aircraft in Culver City, CA, in 1968 that way with a setup someone had outside. Craig _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
