I read the review of the atmospheric dispersion corrector in Sky & Telescope. It seemed too good to be true. Does this corrector actually produce a stable, clear image in unsteady conditions?
Atmospheric Dispersion Corrector?
Started by Bill in Ballard, 04/29/2005 04:43AM
Posted 04/29/2005 04:43AM
| Edited 04/29/2005 04:45AM
Opening Post
Posted 04/29/2005 12:34PM
#1
It's purpose is not to correct for bad seeing (only adaptive optical systems can begin to do that), but to correct for the prismatic dispersion that the atmosphere imparts at a noticable level to objects at lower elevations.
Look at Jupiter as it's rising any evening and you will notice a blueish fringe on one side, and an orangish/yellowish fringe on the other. This is the effect that the corrector mitigates. As the planet rises higher, the effect is diminished.
The problem is the Earth's atmoshere isn't built to APO standards :0
Look at Jupiter as it's rising any evening and you will notice a blueish fringe on one side, and an orangish/yellowish fringe on the other. This is the effect that the corrector mitigates. As the planet rises higher, the effect is diminished.
The problem is the Earth's atmoshere isn't built to APO standards :0
Bill Barrett said:
Does this corrector actually produce a stable, clear image in unsteady conditions?
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