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I would have thought all these stars and galaxies are at optical-infinity?
by TheSpiceIsLife 8y ago
I would have thought all these stars and galaxies are at optical-infinity?
- EForEndeavour 8y agoTrue, and focal length is in fact defined (or at least thought of) under the assumption of parallel light rays coming in from an optically infinite distance. https://en.wikipedia.org/wiki/Focal_length https://en.wikipedia.org/wiki/Focal_length
- varjag 8y agoYes? The sensor is not at optical infinity however, and the focal length determines the field of view you get. Quite clearly, one pixel of a camera with 0.001 degree angular resolution and the one of 10 degree FOV give you very different results.