January - Horsehead Neb - comparison - Page 3

PKay (Peter) · #41 18-01-2018, 11:23 PM

Thanx for the encouraging comments

At the mome, the sky is as clear as it gets. Wahoo!

PKay (Peter) · #42 19-01-2018, 01:54 PM

And yet there's more...

Moved the camera around 90 degrees to get the wide field.
No cropping.
The FOV is about 110 by 83 minutes.

50 of 4 min subs. GAIN=50 BIAS=50

LostInSp_ce · #43 21-01-2018, 11:05 PM

This has turned out great Peter. It's good to see all of the work involved has paid off. Nice one!

ChrisV (Chris) · #44 21-01-2018, 11:52 PM

Here's my go at the Horeshead. Over 2 nights 19 & 20 Jan (chucked the 2 hours of subs from the 18th as of a focusing stuff up, or lack thereof).
Nearly 6 hours of 90sec subs on ASI071Pro with GT81 refractor.
Captured with APT. I tried dithering and I think it worked, but not sure of the parameters yet.
Processed in PI. For calibration files I only used bias frames, no darks. Tried drizzling - wow they are big files! I'm still getting blotchy backgrounds with my processing - maybe I'm overcooking it? Tried TGVdenoising.

More detail on
https://www.astrobin.com/330285/0/

Why does Alnitak spread so much. Is it a reflection of the object, or is limitations of the scope / camera ??

Thanks for looking, Chris

PKay (Peter) · #45 22-01-2018, 07:12 AM

Wowza!!

Amazing!!

I am going to say 'the best image of the Horse Head Nebula I have ever seen"

Well done Chris.

And by the way, that area of sky is naturally blotchy (lots of dust).

ChrisV (Chris) · #46 22-01-2018, 10:04 PM

Um. You should be in PR Peter! But thanks all the same.
I found pushing it out to 5-6hours made a big improvement. And TGVdenoising.

LostInSp_ce · #47 23-01-2018, 02:24 AM

It looks fantastic Chris. You got the faint dust clouds to come out which is the tricky part. Well done!

xelasnave · #48 23-01-2018, 08:55 PM

To Peter and Chris
Both excellent captures.
I only hope I can do half as good when I get my act together.
alex

xelasnave · #49 23-01-2018, 08:58 PM

I put this in my thread on first attempts but so you guys can feel really happy with your efforts this is the best I can do so far.
Thru 8 inch nikon 24 meg camera 30 second captures approx one hour and three dark frames ..
alex

bigjoe (JOSEPH) · #50 23-01-2018, 10:34 PM

Nice faint detail under Horsey there at right.

bigjoe.

LostInSp_ce · #51 24-01-2018, 12:18 AM

Looking good Alex.

ChrisV (Chris) · #52 24-01-2018, 12:43 AM

You got your act together! That's really sharp Alex. It's coming along nicely

PKay (Peter) · #53 24-01-2018, 07:32 AM

Well done ALEX

That is the best Alnitak so far!

Alnitak is a blue giant and I think that is where colour cameras rule.
By setting the gain (ISO) correctly you get the best dynamic range and thus the best natural colour.

I love the spider vane diffractions as well.

xelasnave · #54 25-01-2018, 10:54 AM

Thank you all for your kind and encouraging words I really do appreciate your comments.
Alex

blink138 (Pat) · #55 25-01-2018, 08:19 PM

bit late i know but i tried the horsehead
the sensor was too hot and it became very noisy obviously, 30 degree + evening
apm 107, 2.5" flattener
60da iso 800
40 150s exposures + darks
pat

xelasnave · #56 25-01-2018, 09:43 PM

Hardley late Pat.
And may I complement you upon a wonderful result.
Alex

ChrisV (Chris) · #57 25-01-2018, 11:35 PM

Yes. Its not late its still January ! Nice job battling the heat with a dslr.

PKay (Peter) · #58 27-01-2018, 07:27 AM

Well done Pat, great result.
Try rotating your camera 90 degrees!

PKay (Peter) · #59 27-01-2018, 07:32 AM

My satellite internet has again become unstable.
Only able to get service a few minute every 2 or 3 days.

So quickly, Alex. You want to pick Feb. target?

Your image of the laptop taken with the phone deserves it :-)

xelasnave · #60 27-01-2018, 10:54 AM

Quote:

Originally Posted by PKay

My satellite internet has again become unstable.
Only able to get service a few minute every 2 or 3 days.

So quickly, Alex. You want to pick Feb. target?

Your image of the laptop taken with the phone deserves it :-)

I took my approach I suppose to get something going for beginers in astro photography I suppose similar to the photo competition where a subject is put up and members then have something to work towards.
Also in my case the more lead time the better as it may take me three or four weeks to find the suggested object for the month...and certainly just finding something and setting up to capture that can take some effort.
But I think the idea of something to look forward to could be fun.
Alex