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Orion Starblast 90 Review – Not Recommended

4 Nov 2020, 12:57 UTC
Orion Starblast 90 Review – Not Recommended
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The Optical Tube of Orion Starblast 90

The StarBlast 90 is a 90mm f/5.6 achromatic refractor. At f/5.6, the scope is going to of course have a lot of chromatic aberration, and the StarBlast does so as expected. This means that the scope is in practice limited to rather low magnifications; the images quickly become fuzzy at high powers and of course, the Moon, planets, and bright stars will have ugly purple halos around them. The telescope, unfortunately, has some other optical issues that are a little less expected and a lot more troublesome – the images are just not very sharp even at low powers, which seems to be due to a poor job in manufacture of the lens itself – a wonder, really, since it is kind of hard to mess up a cheap refractor objective. There also seem to be a lot of issues with stray reflections and glare – probably caused by poor interior blackening and baffling.

Unusually, this scope has a lens cap that remains attached when it is taken off of the front. Being held on by a tiny strip of plastic, it’s only a matter of time before it breaks and leaves your ...

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