First test of Orion 6" Astrograph - M42

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Mike in Rancho
Posts: 249
Joined: Sun Jun 20, 2021 10:05 pm

First test of Orion 6" Astrograph - M42

Post by Mike in Rancho »

After a couple nights of trying to learn collimation in the living room, I then tested balance with the camera and guidescope, and took it all outside to test guiding and coma correction wit the MPCC. :D

Caveat - I have nothing dialed in yet. Still getting my feels for collimation, and no adjustment to backspacing of the coma corrector so it's just threaded on in factory position. Other than some wind gusts and occasional slow dither settle down, despite the wonky multi-axis balance issues the guiding went surprisingly well.

Subs had to be short - not only does this thing collect light pretty fast, but this was Sunday night so the moon was very close to Orion and pretty much shining right down the tube. I tried 30 second subs at iso100 for 30 minutes. Tossed several due to the wind, ended up with 26 minutes.

The gradients and weird reflections from the moon were pretty gnarly, so I had to crop off one side pretty hard. Still, as a first try of so many new things, I'm pleased with it. Better than my tries at M42 last year with the refractor, which were also of limited integration and also before I fixed my lens cell.

Also my first time taking M42 using the f/s D5300 (with UV-IR cut), so the color balance was a bit difficult as full field or star sampling didn't seem to be spot on and reds were strong.

Plenty of flaws, and much to learn still, but it was a lot of fun playing with new toys. :)

M42 26pt5m O6 ST8 3A.jpg
M42 26pt5m O6 ST8 3A.jpg (414.74 KiB) Viewed 150 times
Stefan B
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Joined: Sat Oct 31, 2020 8:59 pm

Re: First test of Orion 6" Astrograph - M42

Post by Stefan B »

Hi Mike,

looks like a great first light to me, especially with new scope (even new type of scope), corrector and new methods! Stars seem pretty spot on (of course I don't know how much you cropped ;) ).

Keep it up! :thumbsup:

Regards
Stefan
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Re: First test of Orion 6" Astrograph - M42

Post by admin »

Congrats on first light!
And a very a respectable M42 to boot - this bodes very well! :thumbsup:
Ivo Jager
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firebrand18
Posts: 63
Joined: Tue Feb 04, 2020 1:43 pm

Re: First test of Orion 6" Astrograph - M42

Post by firebrand18 »

Great first attempt Mike, looks good! :thumbsup:

Not even Christmas yet and already unwrapped a new toy!

Cheers,
Nick
Mike in Rancho
Posts: 249
Joined: Sun Jun 20, 2021 10:05 pm

Re: First test of Orion 6" Astrograph - M42

Post by Mike in Rancho »

Thanks, all! :D

Yeah, a well-before X-mas gift to self. I believe I got my 100ED last November, so I was due. Maybe it's a Thanksgiving thing.

I've become so used to F/9 or F/7.2 over the past year, I have some real changes to get used to. In a good way, I imagine. Just as long as I don't find myself taking a million 10 second subs. :lol:

Stefan it was a decent crop on the right side due to the moon, less so on the other three sides. But, 610mm with a D5300, so it's not like a deep crop onto a central galaxy or anything. Backing out the effects of Bin, I believe this image ends up at 4836 x 3293, from an original stack of 5972 x 3961.
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