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Old 09-02-2009, 09:28 PM
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RobF (Rob)
Mostly harmless...

RobF is offline
Join Date: Jul 2008
Location: Brisbane, Australia
Posts: 5,635
Pardon me joining in/hijacking Sandy - but could the gurus please explain if a barlow would work in this situation? I haven't tried, but I imagine a X2 barlow should still focus and give you twice mag but at cost of exposure times having to be 4 times longer (focal ratio doubled)?
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