Thread: Planetary observations with 4" apo refractors
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Old 01-05-2010, 09:01 PM
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dannat (Daniel)
daniel

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Location: Macedon shire, Australia
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keep in mind the 150mm f8 scope has a plastic cap that comes off to reveal 4" of aperture, effectively giving you a 4" f12 - if you are worried about CA
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