Thread: Is This Vignetting, a Hot Spot, or Both?
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Old 31-12-2013, 01:34 AM
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Shiraz (Ray)
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Join Date: Apr 2010
Location: ardrossan south australia
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any possibility that it is stray light getting in the Barlow/FW coupling or elsewhere? clutching at straws a bit though - very odd.

A solution may be to just ditch the Barlow and use 1x1 binning, if that works OK
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