This was one of two images captured during first light of my Takahashi TOA 130 (before the moon rose). I decided to test using the Ra to see how the tube performs at full frame, so I used my SVR90t as a light guide scope riding piggyback. I managed to catch some extra luminance through that tube which helped with drizzling the final result, but it doesn't look to have helped noise much.

This is (38*182s and 46*304s totaling ~5h48m) from two nights with my Canon Ra at iso1600 and Takahashi TOA 130 with 645 flattener. Calibrated with bias, dark and flat frames. There is then 29*400s (~3h15m) through the SVR90t with Hotech SCA flattener.
Location: Cobble Hill
Imaging configuration: TOA 130 with 645 flattener and Canon Ra at iso 1600 and SVR90t with SBIG8300 and Lum filter.
Guiding: SBIG 8300 with OAG through SVR90t
Mount: Celestron CGE Pro
Processing: Pixinsight (Gradient correction/DBE/Colour Correction/BlurX/Attenuated lightness masks/TVG Denoise/MuliscaleMedianTransform/ArcinhStretch/Starnet++)