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Old 08-12-2015, 09:39 AM
rally
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rally is offline
 
Join Date: Sep 2007
Location: Australia
Posts: 896
One of my bugbears

CCDs with 16bit A/D converters - even though the chip only has 8-10 bits of resolveable signal, we put a 16 bit A/D converter chip on it to convert the random noise into "signal"

Unfortunately thats the case for most of them and most people cant work out the difference !

or what about promoting the scope as having 1000X magnification !
Probably has a strehl ratio of 50%, and chromatic aberration that would render most images looking like Charlie and the Chocolate factory (lots of purple)

When I bought my first scope I was assured verbally that I would be able to see the planets - ignorantly, I didnt know enough to ask them how resolved I should expect to see the planets !
After countless hours of tuning and collimation and use under near perfect seeing conditions I put it back into its box - it only ever came out once in the next 17 years - to be quickly put back away again.
Oh and that $10 eyepiece didnt help much either

But then you have Takahashi who make almost no claims at all for the best corrected refractors on the planet !
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