ContriteErudite comments on xkcd #3182: Telescope Types

xkcd #3182: Telescope Types (imgs.xkcd.com)

submitted 10 months ago by xkcdbot@lemmy.world [B] to c/xkcd@lemmy.world

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Title text:

I'm trying to buy a gravitational lens for my camera, but I can't tell if the manufacturers are listing comoving focal length or proper focal length.

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Source: https://xkcd.com/3182/

explainxkcd for #3182

I'm trying to buy a gravitational lens for my camera, but I can't tell if the manufacturers are listing comoving focal length or proper focal length.

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[–] ContriteErudite@lemmy.world 3 points 10 months ago* (1 child)

Please accept this hug from an internet stranger that is likely heading down the same road... hoping the symptoms end up being a huge nothingburger, but if not then I'm going to miss my hobbyist equipment.