I knew some people who used it to compare aerial photos (though generally a spec... | Hacker News

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		comonoid on Jan 10, 2025 \| parent \| context \| favorite \| on: I've acquired a new superpower I knew some people who used it to compare aerial photos (though generally a special device with mirrors was used).

hk__2 on Jan 10, 2025 [–]

> though generally a special device with mirrors was used

Maybe this: https://en.wikipedia.org/wiki/Blink_comparator

comonoid on Jan 10, 2025 | [–]

No, a modification of this: https://en.wikipedia.org/wiki/Stereoscope

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