After getting the Astronomik UHC, I spent some time training foxusmax for the new optical train, with dismal results. I realized at this point that the screws on the Hyperstar were a little loose and my collimation was way off. Spent about half hour day before yesterday collimating it with good results eventually. But then noticed with the data I captured of IC1805 that my flats might not be optimal and might be contributing to the destruction of my images:
The values are clipped and the flat is way too bright. The exposures were already 0.02seconds each so, going low on the exposures was not a reliable option. So I got milky acrylic sheets instead to dim the EL Sheet I was using in my lightbox. Subsequent to this the flats look a lot more well behaved:
Using the Flat ADU calculator on Starizona, I need to have around 26000 ADU for my flats. And in this image you can see that it is very close to that. The exposure now is 1.6 seconds and lot more reliable with headroom to experiment a bit.
The values are clipped and the flat is way too bright. The exposures were already 0.02seconds each so, going low on the exposures was not a reliable option. So I got milky acrylic sheets instead to dim the EL Sheet I was using in my lightbox. Subsequent to this the flats look a lot more well behaved:
Using the Flat ADU calculator on Starizona, I need to have around 26000 ADU for my flats. And in this image you can see that it is very close to that. The exposure now is 1.6 seconds and lot more reliable with headroom to experiment a bit.
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