This is the first image from my lately purchased Skywatcher 250PDS. I bought it used and spent several weeks on optimizing it. The spider for the secondary mirror was swapped for a solid aluminium one, the main mirror was equipped with a primary mirror buffle, the tube was flocked and the focusser was exchanged to a Lacerta Octo Plus.
I still need a more stable mount for this tube now, the AM5 is able handle the weight, but the size of the tube is not matching the stability of this rather small mount.
However, I just had to go for it now.
IC 10 is one of the so called starburst galaxies, it has an unusual large amount of starforming going on. It seems that IC10 is in an early stage of development.
I added H-alpha after subtracting the red continuum, and I decided also to do this with O3 after subtraction of the blue and green continuum, as so much is going on in this dwarf galaxy.
Sadly the O3 does not really show up in the final composit.
To show you that there actually is a (weak) O3 signal, have a look at this composit of the continuum-subtracted Ha and O3 image - this is
strongly enhanced:
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