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Rosette with New 200 f3.2

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#1 maadscientist

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Posted 27 February 2020 - 09:30 PM

I recently purchased a Telescope Service (Sharpstar) Parabolic Imaging  Hypergraph, 200mm F3.2 with a 4 element corrector in the focuser. Here is the Rosette nebula taken on February 22, 2020. I present 2 versions, one showing the OIII component well, and the other bumping up the Hydrogen Alpha. I was able to process it with a 3-D effect looking inside, this came at the expense of the background being a bit wonky. Collimation was slightly off, but is sure didn't hurt the detail. Sony A7s cooled and modified, OPT QUAD filter, stack of 25 - 72 second subs.

 

RosetteO_25-72sec200ImNewtQuadDanLlewellynCN.jpg


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#2 maadscientist

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Posted 27 February 2020 - 09:32 PM

The H alpha higher.

 

RosetteH25-72sec200ImNewtQuadDanLlewellynCN.jpg

 


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#3 DSOs4Me

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Posted 27 February 2020 - 09:39 PM

Very Nice!



#4 sunnyday

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Posted 27 February 2020 - 09:49 PM

this photo is like looking in 3d.
crisp and clear, with a very black sky.
i love it. the h alpha 


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#5 sharkmelley

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Posted 27 February 2020 - 10:08 PM

You've achieved a great result there.

 

It's an expensive filter that Quad-Band filter!

 

Mark



#6 coopman

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Posted 27 February 2020 - 10:08 PM

Wow, those are stunning. Thanks for posting.

#7 calypsob

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Posted 27 February 2020 - 10:20 PM

Nice job, are you still imaging from the DAV?



#8 Starman27

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Posted 28 February 2020 - 11:33 AM

Good detail and color.



#9 Steve OK

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Posted 28 February 2020 - 12:05 PM

A beautiful image...I get an actual visceral reaction looking at it!

 

Steve



#10 einarin

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Posted 28 February 2020 - 12:11 PM

Would like to see bigger versions.



#11 Juno18

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Posted 28 February 2020 - 05:02 PM

Very nice! Beautiful images!

 

Wonderful job!



#12 maadscientist

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Posted 28 February 2020 - 08:41 PM

A big "Thank You!" to everyone who commented and liked. To Mark, yes that filter is around 1K usd...what is interesting is I have a RASA at f2.2 and the separate fast f ratio narrowband filters for it. The 200 f3.2 is really a duplicate focal length scope, but I haven't got the spacing quite right for the sony a7s and the RASA, so I thought I would try this one, it was on sale..(haha, the excuses we make!). If I get better results, I will probably sell the RASA.I assumed the OPT QUAD would be off band track at f3.2, but it seemed to work well. Now I will try the separate high speed filters and compare....another bizarre thing, I imaged on successive nights with the primary a bit on and off collimation...it made a difference in the stars, but not the detail in the Rosette...I figured it would go soft....now it is a parabolic primary vs hyperbolic astrographs out there.........pleased with the scope so far...


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#13 maadscientist

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Posted 28 February 2020 - 08:48 PM

Nice job, are you still imaging from the DAV?

Yes, we tried to move to New Mexico, but in the end we decided to stay here. I finally built an observatory!



#14 Kevin_A

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Posted 01 March 2020 - 11:24 AM

Simply Stunning pics!



#15 F.Meiresonne

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Posted 01 March 2020 - 12:27 PM

Great pictures! Very sharp!



#16 Swordfishy

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Posted 02 March 2020 - 04:29 PM

Superb!




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