Messier 39 in Cygnus. Adding black thread across the lens shade added diffraction spikes, helping the stars of the cluster both stand out from the background more and have more colour.br/Scope: Takahashi FSQ-106, 530mm at f5br/ Camera: SBIG ST-8XE using internal guide chip, SBIG RGB filtersbr/ Mount: Losmandy G-11 Digitalbr/ Exposures: 3 x 5 minutes red and green, 3 x 6 minutes blue binned 1x1br/ Images acquired using CCDSoft 5br/ Calibration in CCDSoft 5; PixInsight Lite and Photoshop CS5br/ Location and Date: near Cayley, Alberta; September 1 2006