Large DIY 900mm lens is large

Science Space
Large DIY 900mm lens is large
diy_900mm_lens.jpg
diy_900mm_lens_moon.jpg

Tony Lovell built this 900mm camera lens using ร‚ยฃ250 of surplus government optics, a custom-machined aluminum body, and lots of ingenuity. It looks great, and the resulting shot of the moon (above) isn’t too shabby, either. An equivalent commercial lens would cost many thousands of dollars. [thanks, Robert!]

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