This is my Sigma 600mm mirror lens. The two internal mirrors (one parabolic, one flat) make it operate like a newtonian telescope, but with the light exiting the rear instead of the side. I bought it years ago for my AE1, but Canon decided to change the mounts for the new EOS series so the lens wouldn't fit my new camera. I was a bit sad about that. I now have a little adapter that will let me fix the FD lens into the EOS mount. All I need now is to remember who I loaned my tripod to...
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creative
Watching the Clouds
This is my Sigma 600mm mirror lens. The two internal mirrors (one parabolic, one flat) make it operate like a newtonian telescope, but with the light exiting the rear instead of the side. I bought it years ago for my AE1, but Canon decided to change the mounts for the new EOS series so the lens wouldn't fit my new camera. I was a bit sad about that. I now have a little adapter that will let me fix the FD lens into the EOS mount. All I need now is to remember who I loaned my tripod to...
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