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I am brand new to imaging and this is my very first set of images using the ASI224mc attached to a Celestron 130EQ scope and mounted on a HEQ5pro to give it stability and GOTO ability. This scope (OTA) has mixed reviews as it has a spherical mirror and I had little hopes for it. But considering what I have managed to get with just around 8mins of data, its looking promising. 🙂
This image is of M81 Bode's galaxy using around 100 exposures of 5sec each. These have been stacked and post processed in SIRIL. No darks or flats have been taken. Still new to this aspect of it ....The images were captured using Ekos. Any tips on how to improve the image are welcome !
Though M101 is a relatively large target it is quite dim and this required a significant effort to get detail into its core. I took 31hrs of 30sec exposures which I then thinned down to the best 18hrs of data. Processed in APP and PS it was tricky keeping the core detail that I had imaged from blowing out.
Lots of advice and lots of very small curves stretches was the key in the end. Hardly sharpened it much with noise reduction undertaken as and when noise just stared to appear during stretching.
As the sensor is biased towards red, colour balancing with green and more so with blue was also necessary.
Taken at Gain 200 with a UV IR cut ASI224MC uncooled camera, APM107/700 scope on an AZEQ6.
It’s a good little sensor if you have the conditions (cold nights) and use Flats, Flat Darks and take Darks every night as the sensor temperature varies being uncooled. For info, I found it ran at about 6 degs above ambient once it was steadily running subs off.
Hope you like it.
By Cosmic Geoff
Many of my Mars images show a ghosting around the planet (see sample image). This was taken with a CPC800, ASI224MC and x2 OMNI Barlow lens.
If I get a clear evening I can try narrowing down the cause before the Mars opposition & closest approach.
The problem is obvious only when using the Barlow lens, but it seems present in some non-Barlow images but much harder to see. It is only obvious in processed images like this one, not in the live raw image. I have imaged Mars both with & without an ADC and once or twice with a flip mirror assembly (i.e. no diagonal or Barlow or ADC in the light path), without nailing the problem.
I have swap outs for almost all the parts (including the telescope) but to pin down the problem could be time-consuming, so would appreciate a heads-up.