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Astrophotography and Sketching >> DSLR & Digital Camera Astro Imaging & Processing
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Dan Watt
professor emeritus
*****

Reged: 10/13/09

Loc: Oceanside, Calfornia.
Quickie M13 - 8" f4 Newt with 1100D new
      #5267464 - 06/12/12 02:46 AM Attachment (84 downloads)
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Took this a few weekends ago, completely forgot about it. I was waiting for the moon to set so I could start work on a mosaic. Got almost an hour of data, 18x300sec @ ISO800. Seeing wasn't particularly great that night but it is what it is. Processed in Pixinsight.

High Res @ Astrobin

Edited by Dan Watt (06/12/12 02:46 AM)

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stelios_STI
member


Reged: 04/23/12

Loc: Greece
Re: Quickie M13 - 8" f4 Newt with 1100D new [Re: Dan Watt]
      #5267515 - 06/12/12 04:42 AM
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amazing!! well done

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alpal
Carpal Tunnel


Reged: 06/15/09

Loc: Melbourne Australia.
Re: Quickie M13 - 8" f4 Newt with 1100D new [Re: stelios_STI]
      #5267537 - 06/12/12 05:37 AM
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That's a very good photo - nice & sharp.

What is the little dougnut to the left of the bright yellow star?
Did you take any flat frames?

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fco_star
Pooh-Bah
*****

Reged: 12/13/10

Loc: Texas, Midland
Re: Quickie M13 - 8" f4 Newt with 1100D new [Re: alpal]
      #5267755 - 06/12/12 09:43 AM
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very nice shot !

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Intensity2x
super member


Reged: 09/06/11

Loc: Northern NJ
Re: Quickie M13 - 8" f4 Newt with 1100D new [Re: Dan Watt]
      #5267761 - 06/12/12 09:47 AM
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I hate when other people's "quickies" are better than my best effort shots...

Nice shot!

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mcarroll
scholastic sledgehammer


Reged: 08/28/10

Loc: Greensboro, NC
Re: Quickie M13 - 8" f4 Newt with 1100D new [Re: Intensity2x]
      #5267828 - 06/12/12 10:27 AM
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Very nice Dan!

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srosenfraz
Carpal Tunnel
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Reged: 03/06/11

Loc: United States
Re: Quickie M13 - 8" f4 Newt with 1100D new [Re: mcarroll]
      #5267924 - 06/12/12 11:32 AM
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Excellent image, Dan. Your colors and great, and its quite sharp.

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Dan Watt
professor emeritus
*****

Reged: 10/13/09

Loc: Oceanside, Calfornia.
Re: Quickie M13 - 8" f4 Newt with 1100D new [Re: alpal]
      #5268094 - 06/12/12 01:17 PM
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Quote:

That's a very good photo - nice & sharp.

What is the little dougnut to the left of the bright yellow star?
Did you take any flat frames?



Looks like a reflection of some sort. Haven't gotten it with any other images I took with this setup yet so I can't pinpoint it. Nearly 20 flats were taken, it took out the rest of the dust no problem.

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mpgxsvcd
Pooh-Bah


Reged: 12/21/11

Loc: Raleigh, North Carolina
Re: Quickie M13 - 8" f4 Newt with 1100D new [Re: Dan Watt]
      #5268235 - 06/12/12 03:01 PM
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The donut is the little circular collimation sticker they put on the primary mirror straight from the factory. Under very high exposures it can rear its ugly head.

I assume you have an AT8IN. I have the same scope and see the same problem with very high exposures. I think you also have to hit it at the right angle as well.

With my GH2 camera I can see M13 in the live view so it makes it really easy to locate the object exactly where I want it in the frame.

Edited by mpgxsvcd (06/12/12 03:05 PM)

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Dan Watt
professor emeritus
*****

Reged: 10/13/09

Loc: Oceanside, Calfornia.
Re: Quickie M13 - 8" f4 Newt with 1100D new [Re: mpgxsvcd]
      #5268604 - 06/12/12 07:10 PM
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Ah, iteresting. I actually have the 8" f3.9 Orion scope but I believe it's pretty much the same as the AT8IN. I have had three other newts with this same exact sticker and never saw it before but they were f5 and f6. If it really bothered me I could easily clone stamp it away.

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alpal
Carpal Tunnel


Reged: 06/15/09

Loc: Melbourne Australia.
Re: Quickie M13 - 8" f4 Newt with 1100D new [Re: Dan Watt]
      #5269052 - 06/13/12 05:06 AM
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That's good Dan - at least we know what it is.

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StoneasRock
member


Reged: 01/31/11

Loc: Toronto, Canada
Re: Quickie M13 - 8" f4 Newt with 1100D new [Re: Dan Watt]
      #5269624 - 06/13/12 01:54 PM
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I'm amazed by your shot...are you under very dark sky?

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Dan Watt
professor emeritus
*****

Reged: 10/13/09

Loc: Oceanside, Calfornia.
Re: Quickie M13 - 8" f4 Newt with 1100D new [Re: StoneasRock]
      #5270297 - 06/13/12 09:32 PM
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Thank you. This site isn't super dark. It's a green zone, good enough to see the milky way but some annoying light domes all around. Another hour inland would be much darker. The moon was up when I took this photo as well.

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Nils_Lars
Postmaster
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Reged: 01/04/08

Loc: Santa Cruz Mountains , CA
Re: Quickie M13 - 8" f4 Newt with 1100D new [Re: Dan Watt]
      #5270584 - 06/14/12 01:33 AM
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Ill take a quickie one like this anyday , sharp and well colored.

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saemark30
scholastic sledgehammer


Reged: 02/21/12

Re: Quickie M13 - 8" f4 Newt with 1100D new [Re: Nils_Lars]
      #5271437 - 06/14/12 03:09 PM
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Nice focus. I wouldn't call that a quickie. Real nice colors.

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saemark30
scholastic sledgehammer


Reged: 02/21/12

Re: Quickie M13 - 8" f4 Newt with 1100D [Re: saemark30]
      #5271440 - 06/14/12 03:10 PM
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Was that done at f/4, seems to be bigger than that.

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Dan Watt
professor emeritus
*****

Reged: 10/13/09

Loc: Oceanside, Calfornia.
Re: Quickie M13 - 8" f4 Newt with 1100D new [Re: saemark30]
      #5272009 - 06/14/12 10:12 PM
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Thanks. This was done @ f4, the image I posted in the thread is cropped a bit, the high resolution image on astrobin was not cropped.

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StoneasRock
member


Reged: 01/31/11

Loc: Toronto, Canada
Re: Quickie M13 - 8" f4 Newt with 1100D new [Re: Dan Watt]
      #5272018 - 06/14/12 10:17 PM
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how's your F4 coupling with the MPCC? totally flat through out the field?

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jwheel
professor emeritus


Reged: 01/23/08

Loc: Fort Davis TX
Re: Quickie M13 - 8" f4 Newt with 1100D new [Re: StoneasRock]
      #5273242 - 06/15/12 04:51 PM
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Great image Dan!

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Dan Watt
professor emeritus
*****

Reged: 10/13/09

Loc: Oceanside, Calfornia.
Re: Quickie M13 - 8" f4 Newt with 1100D new [Re: StoneasRock]
      #5273488 - 06/15/12 07:45 PM
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MPCC makes the field nearly perfect. A bit of elogation at the edges but not too noticeable. Frames line up perfectly for mosaics even with a minimal overlap.

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