I've desperately been waiting for some clear skies to get another session with my C9.25 in.
I got a really mixed bag of four nights, but really made the most of it. Som nights had up to 80% cloud coverage, so, well, yes, not amazing results.
But, persistence is a virtue - I managed to get one of my best galaxy images ever once I've processed the data (a few times!): NGC 1365, The Great Barred Spiral Galaxy (Daniel Petzen) - AstroBin
I had some bad guiding but had 0.85" total RMS error on average. I even dipped down to 0.45" when it cleared up. That's not bad for an old SkyWatcher EQ6-Pro swinging 15kg (excluding counterweights) of equipment around!
I only had to throw away a handful of subs (out of 200+) because of bad guiding. Most had to be discarded because of bad stats (high clouds etc).
I compared drizzle and Lanczos-3 integration (AstroPixel Processor) on the data (I was dithering (dither or die, right?)). Lanczos is much clearer with higher SNR, but the drizzled images most often comes out on top after some stretching and noise reduction.
I don't think NoiseXTerminator and Graxpert have been trained on Lanzcos-3 integrated images. I've been running Graxpert and NoiseXterminator and compared the results. Graxpert is a bit better at time. I also had better results using NX after stretching (normally with SetiAstro Statistical Stretch and some General Hyperbolic Stretch adjustments).
It would be intersting to hear what your experience with different types of integration is when using long focal lengths.
I got a really mixed bag of four nights, but really made the most of it. Som nights had up to 80% cloud coverage, so, well, yes, not amazing results.
But, persistence is a virtue - I managed to get one of my best galaxy images ever once I've processed the data (a few times!): NGC 1365, The Great Barred Spiral Galaxy (Daniel Petzen) - AstroBin
I had some bad guiding but had 0.85" total RMS error on average. I even dipped down to 0.45" when it cleared up. That's not bad for an old SkyWatcher EQ6-Pro swinging 15kg (excluding counterweights) of equipment around!
I only had to throw away a handful of subs (out of 200+) because of bad guiding. Most had to be discarded because of bad stats (high clouds etc).
I compared drizzle and Lanczos-3 integration (AstroPixel Processor) on the data (I was dithering (dither or die, right?)). Lanczos is much clearer with higher SNR, but the drizzled images most often comes out on top after some stretching and noise reduction.
I don't think NoiseXTerminator and Graxpert have been trained on Lanzcos-3 integrated images. I've been running Graxpert and NoiseXterminator and compared the results. Graxpert is a bit better at time. I also had better results using NX after stretching (normally with SetiAstro Statistical Stretch and some General Hyperbolic Stretch adjustments).
It would be intersting to hear what your experience with different types of integration is when using long focal lengths.
