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Frank I posted some pics of my home made fork mount two weeks ago under the heading Bi colour spider in this forum. I think that a few million litres of blackboard paint should fix the moon Doug and Alex. Thanks David I think I will have to change to OAG to get consistent guiding on every exposure. You raise a very good point leinad the lum. does add brightness and detail to the image but it seems to mute the colour channels and probably alter the colour balance. When ccd imaging first started RGB was the norm then lum. were taken at 1x1 binning and rgb at 2x2 binning rate to speed things up. Today with the smaller pixel cameras on medium to long FL scopes maybe you are better off using just RGB binned to 2x2 as the filter technology has also improved from the early dyed glass things.
clear skies Ken
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