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NGC 891 20121116

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#1 Jerry Lodriguss

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Posted 05 December 2012 - 12:18 AM

Galaxy NGC 891 is a beautiful fall astrophotographic target.

http://www.astropix...._DIG/NGC891.HTM

Click on the link to see a larger version of the image with more information.

This image is a composite of six 10-minute exposures at ISO 800 taken with a Celestron C11 Edge at f/10 and an unmodified Canon T3i (600D).

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#2 srosenfraz

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Posted 05 December 2012 - 12:34 AM

Superb NGC 891, Jerry. Great dust lane details, some really nice background galaxies, and the slight blue color to the galaxy is perfect!

#3 nikao

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Posted 05 December 2012 - 05:06 AM

Nice result! .. Love the detail in the galaxy, but I think this deserves a bit more exposures

#4 fco_star

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Posted 05 December 2012 - 07:04 AM

beautiful picture Jerry

#5 jambroseus

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Posted 05 December 2012 - 08:09 AM

Beautiful Jerry! Is the noise profile of the T3i any different from the 2; any improvements over the T2 that you see so far? Do you plan to mod it?

Great resolution with that C11 at f/10.

Congrats on 1st light!

John

#6 Eyegasms

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Posted 05 December 2012 - 08:26 AM

Excellent detail.

#7 JoeR

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Posted 05 December 2012 - 09:08 AM

That is an amazing amount of detail at f/10 and only six subs too. Well done!

#8 zambonikane

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Posted 05 December 2012 - 11:16 AM

This is a great shot. I think I have found a new target when my camera gets back. I probably know the answer to this question, but could I get a similar results with my f/4.9 and a 2x barlow? I know barlows are usually frowned upon unless it is for planetary or lunar, so I am guessing no.

#9 jgraham

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Posted 05 December 2012 - 12:51 PM

Wonderful detail and color. This is one of my favorite challenge objects as its tough to pull out from behind my sky glow. Not bad if I get a night of exceptional transparency.

Beautifully done!

#10 Jerry Lodriguss

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Posted 05 December 2012 - 03:27 PM

Thanks everyone for your kind words and for taking the time to take a look at the pic.

John, It's the same sensor in the 600D as the 550D, the only difference is the articulated LCD screen on the back, which is wonderful.

I do plan to mod it.

Jerry

#11 Jerry Lodriguss

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Posted 05 December 2012 - 03:34 PM

This is a great shot. I think I have found a new target when my camera gets back. I probably know the answer to this question, but could I get a similar results with my f/4.9 and a 2x barlow? I know barlows are usually frowned upon unless it is for planetary or lunar, so I am guessing no.



Thank you!

There are a ton of other variables that might affect your ultimate results, such as how dark your skies are, and the fact that my shot was done with an 11 inch scope and you would be using an 8 inch scope.

But if your sub exposures are long enough to get you up out of the readout noise of the camera, using a good-quality 2-inch Barlow in this instance to get you to f/10 should be ok.

Just be careful because depending on the spacing, a nominally marked 2x Barlow can be a lot more magnification than 2x because the sensor in the camera is a lot further away from the Barlow elements than an eyepiece, so you might end up working at f/15 or f/20 instead of f/10, and then your exposures would get extremely long.

But give it a try!

Jerry

#12 Mike B.

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Posted 05 December 2012 - 09:05 PM

That C11 works well for this one. It brings it in nice and close for a detailed view. Great work, Jerry! ;)

#13 orlyandico

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Posted 05 December 2012 - 10:13 PM

Hi Jerry,

Is this with the EM200 or some other mount?

#14 David Pavlich

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Posted 05 December 2012 - 10:30 PM

Great job, Jerry, on one of my favorite galaxies!!

David

#15 bilgebay

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Posted 06 December 2012 - 01:12 AM

Lovely! It appears you tamed the mount to cope with the long focal length of C11 Jerry.

Very impressive indeed.

Cheers

#16 Jerry Lodriguss

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Posted 06 December 2012 - 02:02 AM

I used my Losmandy GM100EQ for this particular image.

Jerry

#17 Jerry Lodriguss

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Posted 06 December 2012 - 02:04 AM

Hi Sedat,

Thank you!

This was shot with the Losmandy mount, but I have come to the conclusion that most of the problems are with the C11 are seeing related.

If the seeing is not good to excellent, you basically can't do anything with that scope.

I was going to shoot another hour or two after a meridian flip, but the seeing went bad, and I couldn't even focus it!

Jerry

#18 bilgebay

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Posted 06 December 2012 - 03:10 PM

If the seeing is not good to excellent, you basically can't do anything with that scope.



Absolutely !

However, the Hyperstar configuration is quite forgiving even under bad conditions. But then, it is only 560mm FL :(

Clear skies

#19 Jerry Lodriguss

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Posted 06 December 2012 - 03:35 PM

True that!

:-)

Jerry

#20 Nils_Lars

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Posted 08 December 2012 - 12:13 AM

Some outstanding details here Jerry , super sharp at this scale

#21 Jerry Lodriguss

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Posted 08 December 2012 - 01:39 AM

Hi Erik,

Thank you,

Jerry

#22 Barry E.

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Posted 08 December 2012 - 10:44 AM

But if your sub exposures are long enough to get you up out of the readout noise of the camera, using a good-quality 2-inch Barlow in this instance to get you to f/10 should be ok


Great image as usual, Jerry!

Regarding the use of a barlow for deepsky, I have done some thinking in that area:

Why are our stars bigger than the pros?

Keep up the great work.

#23 jimegger

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Posted 08 December 2012 - 05:58 PM

Jerry, you have done it once again - nice shot !!!

#24 petemumbower

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Posted 08 December 2012 - 10:55 PM

Excellent work Jerry, you simply have the magic touch with astrophotography.

#25 Jerry Lodriguss

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Posted 08 December 2012 - 11:25 PM

Hi Barry, Jim and Pete,

Thank y'all very much!

Jerry






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