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Old 08-10-2020, 10:39 PM
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dannat (Daniel)

dannat is offline
Join Date: Sep 2007
Location: Macedon shire, Australia
Posts: 3,411
i’m with renato- easily take the 4.5mm , then 2x barlow -wouldn’t try looking thru 5x -i presume they are just for planetary imaging
A is only slightly better, maybe B is close to 90% but it’s enough of a diff i also don’t like using barlows
more pensive barlows use better glass, more importantly have better polish-
my advice, buy middle of the road, cheap ones can b port, high priced ones are only a few percent better, try finding an old good one, tv, celeste on ultima, baader 2.25x are good -sml and not easily seen thru the eyepiece
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