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45 Open Cluster and
NGC 1432 )
M 45, 3 hours 5 minutes of 5 minute exposures at ISO 800.
M 45, 13 x 5 minute exposures at ISO 400. The dark area at the bottom of this image is probably due to the off axis guider being too close to the camera sensor.
M 45 Unguided, approximately 30 minutes exposure in 1 and 2 minute subs.