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I wonder if the blurriness is a resolution problem or a focus problem, since it’s so close compared to what it’s designed to look at.
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Shouldn’t matter — Saturn should be far enough away that it’s effectively infinite.
Here’s some explanation: https://space.stackexchange.com/questions/58765/how-does-the-jwst-change-focus-when-it-goes-from-looking-at-a-near-subject-to-lo
