- Celestron AVX mount + Vixen 81s refractor +Vixen 0.67x reducer + Atik314E + Xagyl USB filter wheel + Teleskop LRGB filters
- Polarscope alignment for NCP, 2 alignment + 4 calibration stars, All Star Polar Align
- Focus using Bahtinov Mask
- Capture order for light frames RGBL (imaging East of Meridian)
- R:30x93s, G:30x36s, B:30x36s, 50 flats, 50 bias, 20 darks all bin 2x2
- L:75x60s, 50 flats, 50 bias, 30 darks all bin 1x1
- Astro Pixel Processor, GIMP 2.10 for curves/noise reduction
- Total Integration 2h 37m per object
Evaluation:
- My LRGB workflow (personal organisation) is now coming together.
- RGB colour balancing using different exposures (ratio for RGB is 2.6:1:1) worked as there was no need to employ extreme measures in post-processing software to achieve colour balance. I did have to reduce the red Intensity from 1.0 to 0.8 in APP. I will experiment with an RGB ratio of 2:1:1 in future.
- M51 is OK but I would like to double the integration time to see the effect.
- M13, L exposure of 60s is too much as the core is blown. I will try again using 30s and double the L frames.
- Would like to get to 10h integration for each object (weather permitting)
References:
LRGB Exposures, Brian (@oopfan) https://u235.herokuapp.com/#lrgb-exposure
Color Balance, Brian (@oopfan) https://u235.herokuapp.com/#color-balance
G2V Calibrated Color Imaging, Al Kelly http://www.kellysky.net/
Dave