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M 8 with NGC 6559 (Sgr) Technical data: 16"f/8-Hypergraph Ektachrome E200 1x60 minutes Authors: Volker Wendel and Bernd Flach-Wilken
Technical data: 4"-Pentax SDUF I ST10XME and CFW8 filter set RGB (R=4x300s; G=4x300s; B=4x300s; RGB bin1) and in addition the red channel was used for Luminance to create an RRGB. The channels were combined 1,2:0,95:1,6 per software. Because the star bloating of the SDUF I in blue was so extreme, the minimum filter was used in the blue channel to shrink the diameter of the selected brightest stars. This helped a lot to avoid blue halos around the blue stars. Authors: Volker Wendel and Bernd Flach-Wilken Technical data: 4"-Pentax SDUF II ST10XME with Custum Scientific 3nm-H-alpha filter 3x20 minutes exposure time Authors: Volker Wendel and Bernd Flach-Wilken
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