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#2026 Puck Ja

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Posted 29 July 2013 - 10:06 PM

Thanks a lot for sharing a great shot and an interesting targets!

#2027 Dragon Man

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Posted 30 July 2013 - 08:02 AM

Top result Don :waytogo:

very interesting object alignment.

#2028 Digital Don

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Posted 31 July 2013 - 12:19 AM

Thanks for the kind words, guys!

Don:usa:

#2029 mattflastro

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Posted 16 August 2013 - 07:24 PM

Lagoon Nebula M8 ,105mm aperture refractor/F5.6 (F7 native with 0.8x reducer) , author Keven T.'s first light with the camera .
Single frame, unstacked, no filters or processing, no bias, no flats, no darks

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#2030 mattflastro

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Posted 16 August 2013 - 07:30 PM

Wild Duck Cluster - M11 , 105mm / F5.6 (F7 native with 0.8x reducer) , author Keven T.'s first light with the camera

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#2031 mattflastro

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Posted 16 August 2013 - 07:37 PM

Eagle Nebula - M16 , 105mm / F5.6 (F7 native with 0.8x reducer) , author Keven T.'s first light with the camera .
Single frame, unstacked, no filters or processing .

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#2032 mattflastro

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Posted 16 August 2013 - 07:38 PM

Swan Nebula - M17 , 105mm /F5.6 (F7 native with 0.8x reducer) , author Keven T.'s first light with the camera .
Single frame, unstacked, no filters or processing .

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#2033 mattflastro

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Posted 16 August 2013 - 07:40 PM

Trifid NEbula - M20 , 105mm /F5.6 (F7 native with 0.8x reducer) , author Keven T.'s first light with the camera .
Single frame, unstacked, no filters or processing

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#2034 mattflastro

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Posted 16 August 2013 - 07:41 PM

Dumbbell Nebula - M27 , 105mm /F5.6 (F7 native with 0.8x reducer) , author Keven T.'s first light with the camera .
Single frame, unstacked, no filters or processing

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#2035 mattflastro

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Posted 16 August 2013 - 07:43 PM

Pinwheel NEbula - M101 , 105mm aperture refractor/F5.6 (F7 native with 0.8x reducer) , author Keven T.'s first light with the camera .
Single frame, unstacked, no filters or processing

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#2036 mattflastro

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Posted 16 August 2013 - 07:47 PM

Veil NGC6960 , 105mm aperture refractor/F5.6 (F7 native with 0.8x reducer) , author Keven T.'s first light with the camera .
Single frame, unstacked, no filters or processing

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#2037 mattflastro

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Posted 16 August 2013 - 07:49 PM

Veil NGC6992 , 105mm aperture refractor/F5.6 (F7 native with 0.8x reducer) , author Keven T.'s first light with the camera .
Single frame, unstacked, no filters or processing, no bias, no flats, no darks

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#2038 John59

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Posted 16 August 2013 - 07:59 PM

WOW, Nice captures!
What was the ambient temp?

#2039 mattflastro

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Posted 16 August 2013 - 08:06 PM

it was in the 60's .

#2040 John59

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Posted 16 August 2013 - 08:09 PM

What a difference in quality with the temp Delta between his and mine.

#2041 mclewis1

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Posted 16 August 2013 - 08:22 PM

Nice shots Kevin and Matt.

Matt, exposure times? (I suppose 1024x), and AGC/gain info?
Sky conditions (limiting mag)?

#2042 mattflastro

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Posted 16 August 2013 - 08:39 PM

x1024 , gain 1/3 to 2/3 of max (for the fainter targets) . Cherry Springs State Park, mostly blue zone . Just first light photos, no attempt to optimize anything else except gain and integration . All other adjustments (sharpness, color balance, noise reduction, gamma etc) were left to default this time.

#2043 GlennLeDrew  Happy Birthday!

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Posted 16 August 2013 - 10:40 PM

Matt,
Some of Keven's images you posted here seem to be among those Keven has posted in another thread. But these here have a darker sky, suggesting some post adjustment on the black level. In the case of M17 (which Keven has not posted, yet anyway), the degree of blackness in the sky is really suggestive of some after adjustment carried to an exaggerated degree, and is probably not what the camera would ever output.

#2044 mattflastro

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Posted 16 August 2013 - 11:11 PM

Matt,
Some of Keven's images you posted here seem to be among those Keven has posted in another thread. But these here have a darker sky, suggesting some post adjustment on the black level. In the case of M17 (which Keven has not posted, yet anyway), the degree of blackness in the sky is really suggestive of some after adjustment carried to an exaggerated degree, and is probably not what the camera would ever output.

Glenn,
My current theory suggests that because the camera uses a 1/3" ccd, which is known to have less output than the better 1/2" ccd's , the sky is darker. I can actually prove this hypothesis thru induction. If we could make a 1/6" ccd, the sky would be even darker. And in a 1/infinity sensor, which would be a point sensor with no dimensions, the sky would be a perfect value of 0 counts . No read noise, no dark current, just perfect background even without cooling. Although cooling a point sensor might be easy since it would have no area, therefore no volume and given fninte density it would result in 0 mass, and that would take 0 BTU's to cool to any arbitrary temperature . Presto, perfect black 0 count dark sky . Although I've seen such skies in many previous images posted here by many illustrious dudes and was under the impression that it's one of the desirable traits of a camera to chop off the left side of the histogram, because video is different than CCD . :question:

#2045 GlennLeDrew  Happy Birthday!

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Posted 16 August 2013 - 11:23 PM

Matt,
I was pointing out the *difference* between the same images posted by Keven and yourself. If they were unaltered, they should be indistinguishable. But your versions had a notably darker sky.

A smaller chip (with smaller pixels) does not result in a selectively darker sky. While the output for the sky is lower, so it is for all other elements of the image, too. And so intrinsic contrast is not altered. What is altered is the S/N ratio, which is lowered, all else being equal.

#2046 mattflastro

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Posted 16 August 2013 - 11:25 PM

Glenn,
I was pulling your leg. There was a :question: for a hint.

#2047 mattflastro

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Posted 17 August 2013 - 05:34 PM

Glenn,
You were correct and it was my error. His original files were in TIFF format and my conversion to JPG was the problem.
I replaced the offending file with the original (or at least with a jpg that looks like his original tiff on my monitor). I did not do any monitor color calibration recently so YMMV. Your keen eye is appreciated.

#2048 JimT

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Posted 01 September 2013 - 09:20 AM

Matt

I have stumbled in to this before also. JPG can change different formatted images a lot sometimes when converted over. No idea why , but it does.

#2049 JimT

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Posted 02 September 2013 - 03:36 PM

Mr. Snake Valley, Ken James was broadcasting today and I caught this one.
NGC 3372

It was a real crowd WOW'er for sure.

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#2050 Dragon Man

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Posted 03 September 2013 - 10:21 AM

Hey, thanks for posting that Jimbo, I didn't think to take any screen grabs while I was broadcasting last night.
I was probably laughing too much because it was a fun broadcast.
Glad you got one for me :)

That is the Keyhole Nebula in Carina Nebula (NGC 3372), a large naked eye nebula see all night every night from here because it is circumpolar.

That really bright star just left of centre, right under the Keyhole Nebula, is Eta Carina, the brightest known star in the sky.
It is about to Supernova any day now (or maybe in another 100 years :p ).
They estimate that when it does go off it will be as bright as a full Moon illuminating the ground for about 3 weeks then will gradually start to fade over the next 3 months.

Even though Eta Carina is classed as the brightest known star, the reason it doesn't look as bright as Sirius is because it is covered by the Humunculous, the remains of it's last explosion.

The whole Carina Nebula is very easily seen by naked eye and is about the size of a Full Moon.

I was using a Mallincam Xtreme, and a 0.6x Focal Reducer, in an ED80 mounted on an EQ6 mount.






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