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#4526 CharlesC

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Posted 26 September 2016 - 11:46 AM

Went to DAS dark site and finally got stack of M33 and NGC253. Used setup in sig with IR filter.  Seeing wasn't great as could only pickup one central star in M57.  Playing with stack size and exposure time I found;  Stacks over 1000 at 2.5sec exposures lead to excessive green,  while stacks over 1000 at 10sec exposure lead too lose of detail.  Loss of detail was due to mediocre seeing. 

 

M33 10s 988 frames

gallery_46707_6588_15395.jpg

 

NGC253 10sec 1050 frames

gallery_46707_6588_20575.jpg

 

M1 10sec 494 frames

gallery_46707_6588_20606.jpg

 

Horsehead Nebula 10sec 702 frames
gallery_46707_6588_12205.jpg

 

NGC2024 - 10sec 385 frames - lack of detail obvious, seeing not so great

gallery_46707_6588_32588.jpg


Edited by CharlesC, 26 September 2016 - 11:48 AM.

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#4527 Censustaker

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Posted 27 September 2016 - 10:54 AM

beautiful ngc253!



#4528 alphatripleplus

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Posted 27 September 2016 - 10:34 PM

Here are a few captures of northern galaxies from my experiments using twin stacked Meade f/6.3 reducers, yielding an effective f/3.7 with a C8 and Lodestar X2M:

 

NGC6946 Fireworks galaxy 12x15s

 

NGC6946_12x15s_ND_f3.7_CS_2016.9.27_20.22.07.jpg

 

Next are a couple of 10th magnitude galaxies in Draco:

 

NGC 5907, the Knife Edge galaxy, 20x15s, is an edge on spiral galaxy

 

NGC5907_20x15s_ND_f3.7_CS_2016.9.27_20.38.31.jpg

 

NGC6503, 12x15s, is a dwarf spiral at the edge of the Local Void, a fairly unpopulated region several tens of millions of light years in size. The slightly speckled appearance is due to dust lanes in the spiral arms.

NGC6503_12x15s_ND_f3.7_CS_2016.9.27_21.01.30.jpg

 

 


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#4529 DonBoy

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Posted 28 September 2016 - 02:30 PM

Here are a few captures from the other day using the ASI1600MC-Cool with my 80mm focal reduced to f/5.2 + Idas LPS-P2.

 

M31 - 90s x 8

M31 - 90s x 8 - bin2 HBOff.jpg

 

M33 - 90s x 15

M33 - 90s x 15 - bin2 HBOff.jpg


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#4530 DonBoy

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Posted 28 September 2016 - 02:31 PM

M52,NGC7635,NGC7538,NGC7510 - 60s x 5

M52,NGC7635,NGC7538,NGC7510 - 60s x 5 - bin2 HBOff.jpg

 

NGC1499 - 90s x 15

NGC1499 - 90s x 15 - bin2 HBOff.jpg


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#4531 DonBoy

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Posted 28 September 2016 - 02:32 PM

NGC6960 - 90s x 16

NGC6960 - 90s x 16 - bin2 HBOff.jpg


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#4532 DonBoy

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Posted 28 September 2016 - 02:32 PM

NGC6992 - 90s x 10

NGC6992 - 90s x 10 - bin2 HBOff.jpg


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#4533 Susan H

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Posted 28 September 2016 - 03:30 PM

Holy cow, Don! Those are awesome. Thanks for sharing! Clear skies.



#4534 DonBoy

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Posted 28 September 2016 - 03:36 PM

Here are some images from my last two sessions with the Atik414EXC using my 80mm at f/5 +Idas-P2 & f/4 + Idas-D1.

 

M110+ M31 + M32 - 180s x 10

M31 - 180s x 10.jpg

 

M33 - 180s x 10

M33 - 180s x 10.jpg

 

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#4535 DonBoy

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Posted 28 September 2016 - 03:39 PM

NGC6819 - 30s x 15

NGC6819 - 30s x 15.jpg

 

NGC6888 - 120s x 10

NGC6888 - 120s x 10.jpg


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#4536 DonBoy

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Posted 28 September 2016 - 03:41 PM

NGC7789 - 30s x 12

NGC7789 - 30s x 12.jpg

 

 

M52+NGC7635+NGC7538 - 90s x 12

M52+NGC7635+NGC7538 - 90s x 12.jpg


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#4537 DonBoy

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Posted 28 September 2016 - 03:42 PM

NGC6960 - 120s x 15

NGC6960 - 120s x 15.jpg

 

NGC6992 - 120s x 10

NGC6992 - 120s x 10.jpg


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#4538 DonBoy

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Posted 28 September 2016 - 03:45 PM

IC1396a - 120s x 10

IC1396a - 120s x 10 2nd time.jpg

 

IC5146 - 120s x 10

IC5146 - 120s x 10.jpg


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#4539 Astrojedi

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Posted 28 September 2016 - 04:14 PM

Great captures Don. You need to get a Hyperstar to use with that ASI1600. :)


Edited by Astrojedi, 28 September 2016 - 04:14 PM.

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#4540 xxTRIPODxx

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Posted 28 September 2016 - 04:27 PM

Nice pics with the asi1600. Can you shoot and post a couple at say, 2sx10 and 5sx5, 10sx2, 7sx3, under 30sec total i guess . I am using the r2 now and like the quick acquisition, seeing some of the times above i started to fall asleep...lol, i like to keep things quick and if showing a friend, move through the targets quickly, a minute or two and then on to the next.

 

I am thinking about possibly skipping the dslr and going for a mono 1600 for imaging, using it for fast eaa would help sway the decision.

 

Love the quality of your pics, just wondering how much quicker we can go before the image suffers too much.

 

Clear skies, xTripodx 



#4541 DonBoy

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Posted 28 September 2016 - 04:47 PM

 

Holy cow, Don! Those are awesome. Thanks for sharing! Clear skies.

 

Thanks and glad you enjoyed them Susan.



#4542 DonBoy

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Posted 28 September 2016 - 05:05 PM

 

Nice pics with the asi1600. Can you shoot and post a couple at say, 2sx10 and 5sx5, 10sx2, 7sx3, under 30sec total i guess

xTripodx, thanks.

 

Short exposure not really my bag and results all depend on focal ratio, state of binning, gain.   I suggest you stop by NightSkiesNetwork.com some day and if I'm on with the ASI1600 I'd be glad to put up some images that have a total of 30sec exposure.   Short exposure of 30mb files adds up alot of drive space and the more stacks with large files takes much longer to process.   These images were adjust while live and saved the way it was seen.  I have to remove the frames generated from my computer before I run out of space.

 

 

Love the quality of your pics, just wondering how much quicker we can go before the image suffers too much.

The images above could have had the exposure cut by 1/4 but the noise would have been double which for the same amount of total exposure didn't present images as nice.  For broadcast purposes running with the lower quality image actually comes across very nice.


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#4543 xxTRIPODxx

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Posted 28 September 2016 - 06:14 PM

Thanks for the invitation and infomation Don.

 

I will look at nsn again, i did join a while ago had some probs navigating the site and then they shut down for their upgrade and i haven't been back to see if i can get past the main page.

 

Cheers, xTripodx



#4544 Dom543

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Posted 28 September 2016 - 09:38 PM

Great captures Don! Finally someone is using the ASI 1600 and posting real captures rather than praising the camera based on its theoretical attributes.

 

You must be either binning or posting crops. These are the only two ways I could explain the large sizes of the stars in some of your images from a camera with 3 micron pixels. Nothing wrong with either just curious which one.

 

Clear Skies!

--Dom



#4545 JimT

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Posted 28 September 2016 - 10:49 PM

A few captures from this years ECVAR using Atik Infinity camera and 152 ES CF OTA at f/5

120 X 9   IC 405 flaming star nebula
120 X 9   IC 5146 Cocoon
120 X 5   NGC 7635  Bubble
90x10 101   NGC 7023   IRIS

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#4546 DonBoy

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Posted 28 September 2016 - 11:21 PM

 

Great captures Don! Finally someone is using the ASI 1600 and posting real captures rather than praising the camera based on its theoretical attributes.

Thanks Dom

 

 

You must be either binning or posting crops. These are the only two ways I could explain the large sizes of the stars in some of your images from a camera with 3 micron pixels. Nothing wrong with either just curious which one.

I've settled on 2x2 average binning for general image capture for most of the 1600 images I just posted.



#4547 FrankG

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Posted 29 September 2016 - 03:55 AM

Some more Atik Infinity shots from ECVAR, w 15" Starstructure F 4.5  dob down to around F 3 with reducer, 5 to 9-second exposures, not sure how many stacks

Attached Thumbnails

  • ecvarm27II.jpg
  • ecvarm20III.jpg

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#4548 FrankG

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Posted 29 September 2016 - 03:57 AM

Some more Atik Infinity shots from ECVAR, w 15" Starstructure F 4.5  dob down to around F 3 with reducer, 5 to 9-second exposures, not sure how many stacks

Attached Thumbnails

  • Lagoon.jpg
  • ecvarm16II.jpg

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#4549 FrankG

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Posted 29 September 2016 - 03:58 AM

Some more Atik Infinity shots from ECVAR, w 15" Starstructure F 4.5  dob down to around F 3 with reducer, 5 to 9-second exposures, not sure how many stacks

Attached Thumbnails

  • ecvarmbubble.jpg

Edited by FrankG, 29 September 2016 - 04:18 AM.

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#4550 Susan H

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Posted 29 September 2016 - 04:39 AM

All great images, Frank. Tell us what they are. I know all but the first image that you put in your second post. In would be good info for any newbies joining the conversation. The clarity is awesome. Glad you all are having some really nice clear nights to enjoy the views! Wonderful, thanks for sharing. Hope to see more. 


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