Timeline for What limits the usable focal length of telescopes currently?
Current License: CC BY-SA 3.0
9 events
| when toggle format | what | by | license | comment | |
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| Mar 23, 2014 at 12:26 | answer | added | Poruri Sai Rahul | timeline score: 6 | |
| Mar 19, 2014 at 14:22 | vote | accept | SF. | ||
| Mar 19, 2014 at 13:49 | answer | added | Arne | timeline score: 7 | |
| Oct 7, 2013 at 6:56 | comment | added | SF. | "Quality" is rather arbitrary metrics. I replaced "Zoom" with "Usable focal length" ("Usable" - because there are cameras of infinite focal length used commonly in machine vision systems in industry, but the brightness of observed objects drops with distance in them, so a couple meters away everything is entirely dark. They are good for automatic image recognition though, removing perspective effects from image to be analyzed, e.g. in QA of machined parts. Obviously not usable at multi-parsec distances) | |
| Oct 7, 2013 at 6:52 | history | edited | SF. | CC BY-SA 3.0 |
deleted 2 characters in body; edited title
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| Oct 7, 2013 at 6:32 | history | edited | SF. | CC BY-SA 3.0 |
deleted 2 characters in body; edited title
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| Oct 7, 2013 at 5:30 | answer | added | Jeremy | timeline score: 10 | |
| Oct 7, 2013 at 5:23 | comment | added | Jeremy | "Zoom" is a poor word in the question. Telescopes don't "zoom" like consumer cameras. They tend to have a fixed focal length. "Zoom" might mean "how high can the telescope magnify" but telescopes typically aren't designed for high magnifications, as that is not the primary consideration. Suggest replacing "zoom" with "quality" as used in the detail... | |
| Oct 6, 2013 at 20:40 | history | asked | SF. | CC BY-SA 3.0 |