M13 / NGC6205 – The Great Globular Cluster in Hercules

— ACQUISITION —

Telescope: Artec250 equipped with Televue Paracorr Type 2.

Focal ratio: native f/4, working at f/4.6.

Main camera: QSI683WSG-8.

Sensor temperature: -20 degC.

Filters: LRGB Astrodon Gen2

Imaging scale: 0.976 arcsec/px.

Guide camera: Starlight Xpress Lodestar (on the main camera).

Acquisition software: MaxIm.

Guide software: MaxIm.

Guiding performance: variable, typical 0.21 arcsec RMS.

Mount: AP900 GTO CP2.

Sub-exposures

– L: 25x200s + 7x100s + 7x50s (bin1)

– R: 6x200s (bin1)

– G: 6x200s (bin1)

– B: 6x200s (bin1)