Print and assemble this safe solar viewer for the upcoming solar eclipse. 3 copies of the common base, combined with the two lens holders and the screen holder, make a simple system to observe the sun.

Based off plans by T.R. Richardson, available here: http://richardsont.people.cofc.edu/safe_solar_folder/index.html

Designed for use with a 38mm x 500mm fl objective lens (L1907D) and a 21 mm x -27mm fl Barlow lens (L3964), available from surplusshed.com