how good are Acromat scopes

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how good are Acromat scopes

Postby EIZO » Sun Dec 10, 2017 5:23 pm

But just how good are Acromat scopes

thanks

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Celestron Edge 8" Evolution, Esprit 120mm triplet, Sky Tee2, William Optics Binoviewers, many 2" eyepieces. Nikon D4s, D810, Nikkor 70-200 F2.8, 14-24, 70-200, Sigma 150-600 Sport, Gitzo tripods
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Re: how good are Acromat scopes

Postby dave.b » Tue Dec 12, 2017 12:32 am

It's a fairly fast 'scope so you'll get a violet halo on brighter objects, such as the moon, for visual use. A camera will see the halo on a lot more objects.

The slower the 'scope (i.e. longer focal length) the less noticeable the chromatic aberration becomes. This is what is known as a planetary telescope because it has a narrow field of view. The point of focus is also very generous.

For visual use on a wide field deep sky application aperture is king. But you'd probably get more aperture with a reflector based 'scope for the same money.

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