I made a NASA approved pinhole viewer for viewing the August 21 84% eclipse here but noted that the sun image produced is smaller than a dime. I watched a few videos that suggested using binoculars or monoculars with the objective lens facing the sun to produce a larger crisper sun image. They also advised kludging the binoculars onto a photographic tripod for a more stable image. It occurred to me today that I could mount an EF85mm f/1.8 lens on my EF-M lens adapter and use the camera's plate to attach that to my RRS ball head on my tripod. The 85mm lens would be reversed (objective facing the projected image) to provide a "macro" effect. I can save my camera for photographing our group experiencing the eclipse. Think this will work?
Eclipse viewing using a reversed prime lens instead of a pinhole?
- Thread starter tan oak
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Reversing Binoculars ... Get some of that stuff they've been smoking. Try it, the objects look much smaller.
Reversing a lens is normally for close focus macro photography. You cannot focus at infinity.
http://pages.mtu.edu/~shene/DigiCam/User-Guide/A95/Close-Up/Reversal.html
Reversing a lens is normally for close focus macro photography. You cannot focus at infinity.
http://pages.mtu.edu/~shene/DigiCam/User-Guide/A95/Close-Up/Reversal.html
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I did some testing in the sun today and got a decent magnified projected image with my 6X monocular. Had to attach it to the ball head clamp with two stout rubber bands. The sun's image size depends on distance. At three feet it is about the size of a silver dollar. Twice that at six feet. Tried a 8X monocular and found alignment was much more difficult. The objective facing the sun needs to be exactly perpendicular to the sun and the sun keeps moving across the sky. A shade panel must also be mounted on the monocular to cast a shadow on the imaging screen. I just unscrewed the objective and cut a hole the same size in dense cardboard, mounted it on the threads and then screwed the objective back in place.
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