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A low cost solar scope
A low cost solar scope
A sun funnel is a solar projector designed by Rick Fienberg and Chuck Beater and was featured in the
Sept/Oct 2011 issue of ASTRONOMY TECHNOLOGY TODAY.
More information can be found here.
This refractor is made from a used photo copier lens, commonly called a "copy scope". It's approximately 60mm in diameter and projects the suns image onto the screen thru a 9mm eyepiece
This refractor is made from a used photo copier lens, commonly called a "copy scope". It's approximately 60mm in diameter and projects the suns image onto the screen thru a 9mm eyepiece
Low cost solar scope version 2
This scope is a 70mm f/10 refractor I found at a thrift store. The longer focal length of this scope allows the use of a longer focal length eyepiece (17.5mm) which makes focusing easier.
August 2017 Solar Eclipse from Tarpon Springs, Florida
The drive uses a simple worm wheel made from a stack of three wooden disks. The middle disk is 1/2 inch smaller in diameter then the other two. I filled the gap with quick setting epoxy and used a threaded rod coated with silicone to impress the "gear teeth" into the epoxy before it set. The wheel is driven by a 1/4-20 rod attached to a 1/3 RPM motor.
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