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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

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  1. tenex

    Chromatic Aberration, CA, what, why, how?

    Yes. It's longitudinal CA that could degrade overall sharpness, and should be well controlled by a good ED objective. Fringing on high-contrast edges (lateral CA) is said to be mostly related to eyepiece design. For what it's worth, my bins have some variation in susceptibility to CA (with...
  2. tenex

    Chromatic Aberration, CA, what, why, how?

    Here are a couple of good articles you might enjoy reading: Optical Aberrations The Seven Deadly Aberrations What people are mostly talking about here is lateral CA. Besides being better controlled in some instruments than others, it can be more or less apparent according to conditions, bothers...
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