M4 and sigma sco_sag5_090623-04_127x0p95s_dk_hg1_bc2_hpm2_bc2

Globular Cluster Messier 4 and bright star sigma sco

 

127 x 1 second exposures

 

Camera was a 1004x-JG modified video camera on a fixed tripod and ball head. 135mm F2.8 M42 screw thread lens stopped to F4. No filters. Camera in gamma mode 1 (highest internal DSP gamma stretching) and gain 75%.

 

Stacked and gamma stretched in Registax 5, high pass masking in

Photoshop Elements.

Done