so thinking of the upcoming eclipse, I'm planning on making a safe solar filter for the club's 100mm binocular, which has 25x and 40x eyepieces....
It will need a sun finder, I'm thinking a brass tube, maybe 1/2" diameter and 4-6" long, with a translucent disc 1-2" in diameter superglued to the back... center the shadow of the tube on the disc as seen from behind, perfect. this disc/screen probably should have a nice sharp black dot right in the middle
Whatcha guys think?
I can use this mount I made for a laser pointer...
the binos look like this, they are 45 degree, and take standard 1.25" eyepieces as long as they aren't too fat. The 40X eyepieces are 14mm ES 82 deg. wide, similar to a Nagler, so the actual field of view is 2 degrees.
I'm thinking of finding some suitable cardboard, and taking a strip thats 6" x the outside circumference of the binoculars body, and using that as a template to cut a end piece, with 2 4" holes and thousand oaks solar film, assembled with gaffers tape
this should slip on and off the binos, if its too loose, I could always use wide blue painters tape to secure it.