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600MM FL 61.8MM DIA ACH LENS SET FOR COLLEGE OF CHARLESTON'S MYO SAFE SOLAR VIEWER

$16.00 USD
Product Code: L14959
Availability: In Stock

Terry Richardson, Senior Instructor of Astronomy & Physics at the College of Charleston designed a "Make Your Own Safe Solar Viewer" for the upcoming solar eclipse, sunspot cycle 25 and beyond. This set includes our L14956 achromat (61.8mm diameter by 600mm focal length) and a Barlow lens with a focal length of -27mm.  For the achromat:  Place the crown (double convex) with its strongest curve against the negative side of the flint.  Use a couple pieces of masking tape on the edges to hold them together.  The crown side faces the sky.  Using an achromat instead of a single element lens you will get to see more of the sunspots and less blue fringe around the sun (chromatic aberration).

Here are the college's links for instructions and additional information: https://richardsont.people.cofc.edu/safe_solar_folder/the_2-lens_SSV.html

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