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No better time... (M101)

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#1 pgs/sdg

pgs/sdg

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Posted 11 April 2021 - 07:31 PM

.....to improve your skills on springtime galaxies.

 

I tried M101 with an unmodded Canon T5i a couple years ago and was ecstatic with the result because it was one of my first images... but I think this one is better.

Nice not to have to fight the DSLR noise.

I only cooled my ASI294MC Pro to 0 deg. Getting much warmer down south so will be needing to take the temp. down further from now on. 

Collimation on my 8" Edge HD was a little off - so I recollimated it and I think things are a bit sharper on this image than the last one I posted. (M51) 

I estimate the seeing on both evenings was about average  - 3/5 maybe. Guiding ran from .6" - .8" RMS with occasional excursions down to .4" and up to about .9" - which I still cannot figure out and am assuming its just PE. (I generated a PEC curve in EQMOD - but am now using the ASIAIR to run the mount/guiding - so not using EQMOD right now)

 

This is data from 4/5 (30 subs) & 4/8 (60 subs) x 120 secs    -  3 hours

Gain 120

15 darks

20 flats  (exp. 2.5 second for an ADU ~ 30,000)

25 flat darks

ASI294MC Pro

Bortle 4

EQ8 mount 

Dithering

Stacked in DSS and processed in PS. 

 

What do you think? Any tips, advice or critique is welcomed. 

 

Going for M63 tonight!!

 

M101.jpg


Edited by pgs/sdg, 11 April 2021 - 08:58 PM.

  • F.Meiresonne, mikewayne3, Thomas Marshall and 5 others like this

#2 hornjs

hornjs

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Posted 11 April 2021 - 08:06 PM

Man, that is really nice image!  Gives me hope with similar equipment.  Was this with reducer or at f/10?  



#3 pgs/sdg

pgs/sdg

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Posted 11 April 2021 - 08:56 PM

Man, that is really nice image!  Gives me hope with similar equipment.  Was this with reducer or at f/10?  

thanks...still learning alot, but I really like this 294MC pro (& the ASIAIR!).

This was with the Cel. .7x focal reducer.




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