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Old 17-01-2020, 01:24 PM
Wavytone
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Wavytone is offline
 
Join Date: Jul 2008
Location: Killara, Sydney
Posts: 4,147
There's a basis behind that list, though:

a) fast achromats will have lots of secondary colour at high magnifications. OK for a finder, but don't expect great images on the planets or moon.

b) quite a few budget reflectors have cheap spherical mirrors, where the spherical aberration will also cripple them at high powers.

c) use of low-precision plastics where metal is really needed, eg places where the point stresses are high and plastic will deform, and places where accuracy is needed. For example secondary mirror cells, and focusers.

d) hopelessly inadequate mounts/tripods,

e) poorly constructed OTA's.

Fixing these mistakes costs $. Put it another way - you won't get what you didn't pay for - ie quality.

Conversely i'd also argue that crap equipment should never have been made in the first place. It is at best useless, at worst it will disillusion kids when they find out what they have was crap from the start, and its sole purpose was to extract money from parents pockets.
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