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Old 11-05-2020, 12:23 AM
Hemi
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Pup popped out

I’ve never seen the pup convincingly. A bit disappointing really as I’m mostly a visual observer. As I’ve mentioned before though I’m doing a fair bit of EAA when it’s really hot outside. Anyway I was reading Jerry Rodriguez’s article on splitting Sirius photographically, so thought I would try in real-time.

Live video was amazing
Sharpcap at the fastest capture rate, gain turned gradually down just enough, until the Pup popped out!
ASI 294mc. C925 Meade f6.3 reducer azeq6 (eq)
The pic: 1300 frames, autostakkert then RegiStax (I’m a complete beginner in any type of processing Outside sharpcap, and certainly with both of these software).

I know it’s pretty crude/basic so any tips will be good.

Thanks for looking
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  #2  
Old 11-05-2020, 05:39 PM
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AstroJunk (Jonathan)
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Well done!

Increase your image scale, if you can get the focal length up to 5000mm then there is much greater separation and it should split readily with your camera on a night of reasonable seeing. Visually, its a target for those nights with superb seeing when your image holds strong at 3-400x

I've attached a similar shot I took some time back and you can see how that extra FL helps it pop.

Your capture technique is great
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  #3  
Old 11-05-2020, 06:08 PM
Hemi
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Thanks Jonathan,

Wow thatís a nice image! I will try for more focal length. Initially with just stock (without reducer) and then with a 2xbarlow, which will give me almost 5000. Ive not had much luck imaging with a Barlow in the chain.

Splitting doubles seems to suit EAA. It might be an activity for bright nights. Otherwise i like Galaxies mainly with the C925 (EAA)

Cheers

Hemi
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  #4  
Old 11-05-2020, 07:50 PM
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Outcast (Carlton)
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Hemi,

Something else that might help is a Bhatinov mask for focussing.. assuming you aren't using one already?

Will help in general terms anyway with your EAA... just wack it on, point at a bright star & adjust focus til the spicules line up properly...

Much more accurate than just trying to do it by eye...

Cheers
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  #5  
Old 11-05-2020, 08:57 PM
Hemi
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Thanks Carlton, i have a new toy (ZWO EAF), that Iím trying to get to grips with. Currently just manually driving it within sharpcap. I cant puzzle out how to use SCís Autofocus routine.
Iím sure my focus could be better. In fact I shamefully didnít refocus that night (from the night before), let alone several times a night!

Best

Hemi
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  #6  
Old 16-05-2020, 09:08 AM
phomer (Paul)
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Quote:
Originally Posted by Hemi View Post
Iíve never seen the pup convincingly. A bit disappointing really as Iím mostly a visual observer. As Iíve mentioned before though Iím doing a fair bit of EAA when itís really hot outside. Anyway I was reading Jerry Rodriguezís article on splitting Sirius photographically, so thought I would try in real-time.

Live video was amazing
Sharpcap at the fastest capture rate, gain turned gradually down just enough, until the Pup popped out!
ASI 294mc. C925 Meade f6.3 reducer azeq6 (eq)
The pic: 1300 frames, autostakkert then RegiStax (Iím a complete beginner in any type of processing Outside sharpcap, and certainly with both of these software).

I know itís pretty crude/basic so any tips will be good.

Thanks for looking
Hemi,
I am a bit like you, I have never convincingly seen the pup.
Nice to see an image of it though.
Paul
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