Hit this cluster with an all nighter after Moon set. Processed at 1.6x native pixel size. Took a lot of care with focus to get the star colours at their best.
Canon 5DH, 100ED at f/7.65 and FL 765mm with Hutech #7887 FR/FF. Hutech LPR filter. FOV approx 3x2 degrees.
Exposures 20X(30s, 1m, 2m ) and 36x4m at 1600ISO. Fridge at -10C. Usual HDR method. Transparency and seeing both good.
Large image 11MB
http://d1355990.i49.quadrahosting.co...c3532100ed.jpg
Bert