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Astrophotography and Sketching >> Beginning and Intermediate Imaging

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shawnhar
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Reged: 06/25/10

Loc: Knoxville, TN
One hour of time on M74 new
      #6172551 - 11/02/13 08:21 PM Attachment (32 downloads)

Got one hour 10 miuntes in last night before the clouds got me, this is a smaller target than I thought. Looking forward to maybe getting more subs on this one, supposed to be clear again tomorrow night.
Image details:
Scope - Meade 10" SCT with 6.3 focal reducer, focal length 1745mm
Mount - Skywatcher EQ6 Pro
Camera - Stock Canon XS dslr - ISO 400
Filter - None
Guiding - PHD with ST80 and Meade DSI color
Exposure - 13 exposures at 5 minutes plus Darks n Flats
Processed in Star Tools and Photoshop


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Madratter
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Reged: 01/14/13

Re: One hour of time on M74 new [Re: shawnhar]
      #6172557 - 11/02/13 08:24 PM

Excellent start. It is a beautiful object, but it definitely isn't in the big category.

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shawnhar
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Reged: 06/25/10

Loc: Knoxville, TN
Re: One hour of time on M74 new [Re: Madratter]
      #6172563 - 11/02/13 08:32 PM

Thanks Mad!
I thought I might try F10 on this one, but I'm a little worried about how much extra time it would require, and I would also need to get my polar alignment better, only used the polar scope on the mount when I put it back on the pier. Man I tell ya, I don't want to take my gear anywhere once I have a decent PA on my pier!


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Raginar
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Reged: 10/19/10

Loc: Rapid CIty, SD
Re: One hour of time on M74 new [Re: shawnhar]
      #6172708 - 11/02/13 10:14 PM

Very cool.

The difference between f10 and f6.3 really is inconsequential to astro photography. It isn't about how bright the object is... It's all integration.


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rflinn68Moderator
Carpal Tunnel


Reged: 03/09/12

Loc: Arkansas
Re: One hour of time on M74 new [Re: Raginar]
      #6172765 - 11/02/13 10:57 PM

I think it looks good...really excellent for only 1 hour at that low of an ISO. Good luck on getting more data.

I may have to give this one a go when I put the RC back on the mount. I'm still having fun with the little 80mm triplet. Shooting the Heart nebula right now. Curious to see what a few hours with a DSLR will get without an h-alpha filter. Anyway, keep up the good work!


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shawnhar
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Reged: 06/25/10

Loc: Knoxville, TN
Re: One hour of time on M74 new [Re: rflinn68]
      #6172818 - 11/02/13 11:35 PM

Thanks Richard, I chose to lower the iso after a 5 minute test at 800 showed the dreaded, creeping red death of light pollution. Really wanted 10 min subs but without a LP filter that wasn't gonna happen.
@ Chris, I thought you had to increase the sub length or number of exposures by like double every 2 F-Stops, like that's why the hyperstar works so good. I will be lucky to get 5 hours out of this target du eto work and weather. Do you think it's worth it to go to F10? The image scale at 2500mm would make for a much bigger galaxy...of course at that focal length little errors seem bigger.


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proteus5
scholastic sledgehammer
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Reged: 06/24/10

Loc: Southern New Jersey
Re: One hour of time on M74 new [Re: shawnhar]
      #6172954 - 11/03/13 01:20 AM

Really nice one Shawn.

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terry59
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Reged: 07/18/11

Loc: Colorado, USA
Re: One hour of time on M74 new [Re: shawnhar]
      #6173191 - 11/03/13 06:45 AM

That is looking good.

Gee, is it galaxy season already?


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shawnhar
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Reged: 06/25/10

Loc: Knoxville, TN
Re: One hour of time on M74 new [Re: terry59]
      #6173288 - 11/03/13 08:45 AM

Thank you Robert, Terry, time flies doesn't it? I missed a bunch of targets this summer due to weather, it was awful, so I am hoping for a good winter.

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CounterWeight
Postmaster
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Reged: 10/05/08

Loc: Palo alto, CA.
Re: One hour of time on M74 new [Re: shawnhar]
      #6173758 - 11/03/13 01:33 PM

Shawn that is a great start on this. I like the image scale / framing a lot.

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astrodog73
super member


Reged: 02/22/13

Loc: Australia
Re: One hour of time on M74 [Re: CounterWeight]
      #6173991 - 11/03/13 03:53 PM

Well done.... you bagged the supernova too... M74 has one of the lowest surface brightness' of the Messier objects, its certainly a tough one...

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shawnhar
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Reged: 06/25/10

Loc: Knoxville, TN
Re: One hour of time on M74 new [Re: astrodog73]
      #6174308 - 11/03/13 07:13 PM

Well I'll be, there is a supernova in there! Mag 14 or dimmer from what I can gather. Cool, my 1st supernova!
Getting ready to start again tonight after my camera battery is charged...whoohoo!


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Madratter
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Reged: 01/14/13

Re: One hour of time on M74 new [Re: shawnhar]
      #6174321 - 11/03/13 07:18 PM

If you are still using a camera battery, do yourself a favor and get one of those powered replacements. They don't wear out, and they don't generate heat like the battery. Plus you don't have to recharge them.

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shawnhar
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Reged: 06/25/10

Loc: Knoxville, TN
Re: One hour of time on M74 new [Re: Madratter]
      #6174358 - 11/03/13 07:44 PM

Yeah, I know, I would love to but it's all about the money, money, money. I am stuck at a max of 3 hours in one night.
If I could afford it, I would run 110 out to my "observa-deck", but it is about 250 feet from my house and they are proud of ground rated copper wire, so I am running my gear off a big deep cycle battery.
Cheaper option for me is to pick up a spare battery and swap it out mid-session, but boy, I sure don't want to get out of bed and go out in the cold at 2 am on a school night!


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Wouter D'hoye
Carpal Tunnel
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Reged: 06/27/03

Loc: Belgium
Re: One hour of time on M74 new [Re: shawnhar]
      #6174839 - 11/04/13 03:56 AM

Hi,

I love your image. but I think i'd love it even better if it was a wee bit brighter. Framing though is excellent. I like some space around a galaxy.

Wouter.


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JoseBorrero
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Reged: 09/04/09

Loc: Puerto Rico Island
Re: One hour of time on M74 new [Re: Wouter D'hoye]
      #6174951 - 11/04/13 07:34 AM

very good!

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Raginar
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Reged: 10/19/10

Loc: Rapid CIty, SD
Re: One hour of time on M74 new [Re: JoseBorrero]
      #6174992 - 11/04/13 08:29 AM

Get a nice 100' extension cord. I was running my ROR on one for the last year before I put power in. And those power adapters on Amazon are cheap. I got one for my Nikon and it was about 25 bucks.

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shawnhar
Post Laureate
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Reged: 06/25/10

Loc: Knoxville, TN
Re: One hour of time on M74 new [Re: Raginar]
      #6175125 - 11/04/13 10:09 AM Attachment (3 downloads)

Thanks Wouter and Jose!
Chris, I have thought about burying a couple of 100' cords, I will have to look into one of those adapters, I thought they were much more expensive.
I got a littl emore data last night, but I have been having issues with the power inverter creating lots of noise in the guide cam and the laptop bat died before I got to it.
Now up to 2 1/2 hours, it's a little dark and I went a little overboard with the decon, got some ringing on the stars, but I like where this is going. Might be able to get some more time in tomorrow night!


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CounterWeight
Postmaster
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Reged: 10/05/08

Loc: Palo alto, CA.
Re: One hour of time on M74 new [Re: shawnhar]
      #6175147 - 11/04/13 10:21 AM

I like it too - Like the processing here - nice sense of size / depth !

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TimN
Pooh-Bah


Reged: 04/20/08

Loc: Ontario, Canada
Re: One hour of time on M74 new [Re: CounterWeight]
      #6175331 - 11/04/13 12:13 PM

Very nice especially for a very faint image. Your processing looks very good. The extra time also makes a difference. Congratulations!

I got an adapter from ebay for my Nikon that was very cheap. There is another thread around that says they quickly fail. However, after a lot of investigation I found the only problem was with the attached cord that is very cheap and prone to failure - especially with cold weather. I just replaced the cord and it has been great for 2 years - so far. An excellent value.


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