M4 Cat's Eye Cluster (NGC 6121)
Size:36' (75 ly) Mag:5.6 Dist:7,200 ly Age:13 by

Camera: Canon EOS 300D Digital Rebel
Telescope: Celestron 9.25"SCT w/0.63x reducer, 1200mm @ f/5
Exposure: 15x30s=7.5 min @ ISO1600
Mount: Celestron ASGT
Processing: Dark, flat and bias calibration, alignment, stacking and digital development in IP 2.8. Alignment in Registar.
Levels, curves, skyglow & noise removal and shapening in Photoshop CS with Neat Image & Gradient exterminator. Image cropped.