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ah thanks a lot people that is very good info
do we need the much longer subs normally associated with narrow band imaging?
anybody know how effective the L-Pro is at light suppression? thinking of getting the 77mm for widefield imaging with my canon lenses close to the city, it may be a lot better than the astronomik clip in and in particular for full frame sensors
thanks reggie, nik
ryan, that is a great idea!
pat
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