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The
camera is operating 20C above design temperature,
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and
optical design predicts some coma at the edge of the
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field.
The predicted length of tails is 9 px. We see 0 to 14
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pixels
from the middle to the edge of the field. The tails are
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present
because the camera focal length is too long at room
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temperature,
and Element 9 is not at the right place in the
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converging
beam. This induces primarily radial coma that
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should
go away at 0C.
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In
the center of the field where coma is not a problem, we
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see
aberrations that are expected by the optical design
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(<<2px
rms dia).
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The
bottom line on image quality is that the real test is at
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the
outer part of the FOV, and we will not be able to say
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much
until we get to HI at 0C.
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