Got to do it every year – this is the 2017 version. Also trying out my new Revelation x0.75 reducer for the RC8. Seems to work very well for a very reasonable price £69. Spacing should be 80mm +/- 5mm. I managed to get 75mm with my filter wheel and 460EX.

Orion Nebula, Diffuse Emission Nebula, Orion
Mag 4.0 Size 85’x60′
200mm f8 RC at f6 (new Revelation x0.75 reducer)
Piggyback guiding with new 70mm f/7 achromatic refractor
L 15×60s 2×2, RGB 15×30s 4×4 BPM
Atik 460EX (-25C), LRGB filters, IDAS P2 LPR filter
Captured in APT, Processed in Nebulosity3, PS CC, LightRoom