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Equipment Discussions >> Electronically Assisted Astronomy

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Reged: 06/18/08

Loc: Ottawa, Ontario, Canada
Re: Mallincam star shapes [Re: jujumaster]
      #5505752 - 11/05/12 05:52 PM

Although it was Maurice who raised the point, I'll answer...

A Barlow or focal reducer has refractive optics, which will introduce chromatIc aberration. And so they wreck the pure color fidelity of a reflecting telescope, where all wavelengths would otherwise come to the same focus until lenses are thrown into the optical train.

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