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Old 16-08-2018, 06:02 PM
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Slawomir (Suavi)
Amateur Photon Collector

Slawomir is offline
Join Date: Sep 2014
Location: Proserpine
Posts: 2,745
Images would certainly help in identifying the cause.

Towards the end of this short review there is a comparison of halos around a bright star from a 12nm OIII and 3nm OIII.
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