Saturday 17 July 2021

M71 & M27

Last night was the second opportunity to capture some light with the new astro camera. Time for some tests after plenty of reading on the different and optimum settings for gain, exposure and time and balancing that with my scope size and focal length. So we have 2 images M71 & M27. M71 a wonderful globular cluster in Sagitta. Exposure time was 15 x 3 minute exposures with gain at 0 to take advantage of the full well depth 50ke and 16 bit. Readout noise is below detection when cooled to -15. I am happy to play for a few months in Mono before unleashing the filters. M27 was set to 5 minute exposures and here just six of them for 30 minutes of total exposure. A crop too of approx 400%











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California Nebula

  NGC1499 The California Nebula. Discovered in 1889 The California Nebula is an emission nebula in the constellation of Perseus, currently v...