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>Are you suggesting astrophotography has physical constraints that non-astro photography does not? No, he's saying the diameter of a lens affects its resolving
by gmiller123456 9y ago
>Are you suggesting astrophotography has physical constraints that non-astro photography does not?
No, he's saying the diameter of a lens affects its resolving power. This is due to the diffraction of light bouncing off the lens. Larger scopes have less diffraction due to the laws of physics.
- CydeWeys 9y agoLenses aren't used in "real" telescopes -- they're made out of mirrors only. Does your explanation still work?
- gmiller123456 9y agoThe mirrors in telescopes are still lenses. You're probably thinking of refracting lenses as being "real" lenses. But the parabolic mirrors used in telescopes accomplish the same task. And, yes, diffraction is still just as much of an issue.