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FORUMS Photo Sharing & Visual Enjoyment Astronomy & Celestial 
Thread started 27 Oct 2010 (Wednesday) 15:45
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You don't need a telescope

 
keith ­ breazeal
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Jan 09, 2013 17:30 |  #1261

My favorite spot to shoot from. Just up the road from my place is the Peddler Hill Scenic Overlook. It's @ 7,000' in the Sierras just south of Lake Tahoe on Highway 88.(Amador County, Ca.) No city lights for 50-75 miles and blocked by mountains.
This my shot that's is on Google Earth/Panoramio. You can enlarge it to pixels. It was shot with a 7D & 10-22mm. I used my LED headlamp to light the foreground.
The orange glow on the horizon is the approaching sunrise.
http://www.panoramio.c​om …er=date_desc&us​er=4600445 (external link)


Canon 5D Mark III, Canon 7D, 40D, Canon SL-1, Canon 300mm f2.8L IS USM, 100-400L IS USM, f2.8 70-200L IS USM, Canon 24-105L IS, Canon 40mm f2.8 Pancake, Rokinon 14mm f2.8, Tokina 16-28mm F2.8 At-X PRO, Canon 10-22, Canon 28-135, Canon 18-55, Battery Grips, lots of other junk
Web Site (external link)- Facebook (external link) My FLickr Photos (external link)

  
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mac7001
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Jan 09, 2013 17:49 |  #1262

loved going through these pictures :D. good work guys and gals!




  
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luigis
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Jan 11, 2013 19:11 |  #1263

Canon 60Da, 400mm F5.6 lens, Astrotrac Mount.
42 shots of 1 minute each at F6.3 ISO1600

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No telescope involved! :-)

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archer1960
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Jan 11, 2013 19:31 |  #1264

luigis wrote in post #15476828 (external link)
Canon 60Da, 400mm F5.6 lens, Astrotrac Mount.
42 shots of 1 minute each at F6.3 ISO1600

...

No telescope involved! :-)

Holy #$@@&^. That is fan-effing-tastic! I knew the 400 f/5.6 was a good lens for astro, but that is just totally over the top!


Gripped 7D, gripped, full-spectrum modfied T1i (500D), SX50HS, A2E film body, Tamzooka (150-600), Tamron 90mm/2.8 VC (ver 2), Tamron 18-270 VC, Canon FD 100 f/4.0 macro, Canon 24-105 f/4L,Canon EF 200 f/2.8LII, Canon 85 f/1.8, Tamron Adaptall 2 90mmf/2.5 Macro, Tokina 11-16, Canon EX-430 flash, Vivitar DF-383 flash, Astro-Tech AT6RC and Celestron NexStar 102 GT telescopes, various other semi-crappy manual lenses and stuff.

  
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ElectricDoom
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Jan 11, 2013 19:40 |  #1265

There are some amazing images in this thread.

This is the best I've got so far, I'm new to astrophotography (new to photography as a whole)

Orion Nebula
Canon 600D, 70-200 f2.8 & 1.4x | 5x 2sec, ISO6400 & 3200 mix, stacked in cs6


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Jupiter & 3 Moons
Canon 600D, 70-200 f2.8 & 1.4x | 1x 1sec, ISO1600

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They're not that spectacular but I was pretty excited when I took them



  
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wargrafix
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Jan 11, 2013 23:52 |  #1266

Canon 550d, Sigma 70-300mm, 8:40 min exposure.

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Madweasel
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Jan 12, 2013 05:33 |  #1267

Fantastic result Luigis, very impressive. I wonder how much better the 60Da is at such work than the conventional bodies?


Mark.

  
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steveh74
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Jan 12, 2013 10:50 |  #1268

luigis wrote in post #15476828 (external link)
Canon 60Da, 400mm F5.6 lens, Astrotrac Mount.
42 shots of 1 minute each at F6.3 ISO1600

QUOTED IMAGE

No telescope involved! :-)


Ok...you've convinced me that I need to get an Astro Trac or some kind of autoguider! Great pic!


CANON: EOS 60D/ IXUS 100 IS
LENSES/GEAR: 18-135 IS, 24-105L, 50m, f/1.8, 70-300 IS USM, 430 EXII, Manfrotto tripod and monopod
ASTRO: Meade 12" Lightbridge, Coranado PST

  
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Nighthound
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Jan 12, 2013 11:01 |  #1269

luigis wrote in post #15476828 (external link)
Canon 60Da, 400mm F5.6 lens, Astrotrac Mount.
42 shots of 1 minute each at F6.3 ISO1600

QUOTED IMAGE

No telescope involved! :-)

Now there's proof! :) Outstanding work Luigis, the warm dust tones are fantastic. You captured a lot of faint detail with only 42 minutes and relatively short sub exposures. Very well done.


Steve
Canon Gear: 1D Mark IV | 1D Mark II | 5D | 20D | 500L IS (f/4) | 100-400L
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Steve ­ M
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Jan 13, 2013 12:06 as a reply to  @ luigis's post |  #1270

Luigis..Beautiful shot!! Could you give some hints and/or links as to the postprocessing?


Embrace those who seek the truth; run from those who claim to have found it.

  
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archer1960
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Jan 13, 2013 13:08 |  #1271

luigis wrote in post #15476828 (external link)
Canon 60Da, 400mm F5.6 lens, Astrotrac Mount.
42 shots of 1 minute each at F6.3 ISO1600

QUOTED IMAGE

No telescope involved! :-)

Could you post one of your subs, so we can see how much light were getting in each one?


Gripped 7D, gripped, full-spectrum modfied T1i (500D), SX50HS, A2E film body, Tamzooka (150-600), Tamron 90mm/2.8 VC (ver 2), Tamron 18-270 VC, Canon FD 100 f/4.0 macro, Canon 24-105 f/4L,Canon EF 200 f/2.8LII, Canon 85 f/1.8, Tamron Adaptall 2 90mmf/2.5 Macro, Tokina 11-16, Canon EX-430 flash, Vivitar DF-383 flash, Astro-Tech AT6RC and Celestron NexStar 102 GT telescopes, various other semi-crappy manual lenses and stuff.

  
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luigis
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Jan 15, 2013 12:31 |  #1272

Thank you for the comments really appreciated! The Astrotrac is a GREAT piece of equipment for astrophotography without a telescope. Not needing to carry a notebook or a guiding setup is a pleasure (to me).

Madweasel wrote in post #15478184 (external link)
Fantastic result Luigis, very impressive. I wonder how much better the 60Da is at such work than the conventional bodies?

The 60Da is more sensitive to the red and near-IR part of the spectrum so it gets more light from red and near-red nebulas.

Steve M wrote in post #15482755 (external link)
Luigis..Beautiful shot!! Could you give some hints and/or links as to the postprocessing?

Yes, sure!
I have a strange worflow. I don't stack RAWs. I develop my RAW files using DXO optics so I setup white balance, exposure, contrast, saturation, noise reduction, etc and then batch convert all the RAWs to 16 bit TIFFs.
Then I stack-align the TIFFs (with DeepSkyStacker or similar).
And I process the final stacked shot with Photoshop.
I'm not using dark frames, flats, etc.

archer1960 wrote in post #15482957 (external link)
Could you post one of your subs, so we can see how much light were getting in each one?

Here's a single sub without any processing at all, just RAW=>JPG conversion with all defaults in DXO.

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Stacking several shots reduces the noise and then you can stretch the histogram without destroying the information.

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SteveInNZ
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Jan 15, 2013 13:00 |  #1273

That's interesting Lugis. Would you mind posting an example of the TIFF that you feed to DSS ?
It's always interesting to hear different approaches to solving the same problem.
How do you polar align your Astrotrac ?


"Treat every photon with respect" - David Malin.

  
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archer1960
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Jan 15, 2013 13:56 |  #1274

luigis wrote in post #15492063 (external link)
Thank you for the comments really appreciated! The Astrotrac is a GREAT piece of equipment for astrophotography without a telescope. Not needing to carry a notebook or a guiding setup is a pleasure (to me).

The 60Da is more sensitive to the red and near-IR part of the spectrum so it gets more light from red and near-red nebulas.

Yes, sure!
I have a strange worflow. I don't stack RAWs. I develop my RAW files using DXO optics so I setup white balance, exposure, contrast, saturation, noise reduction, etc and then batch convert all the RAWs to 16 bit TIFFs.
Then I stack-align the TIFFs (with DeepSkyStacker or similar).
And I process the final stacked shot with Photoshop.
I'm not using dark frames, flats, etc.

Here's a single sub without any processing at all, just RAW=>JPG conversion with all defaults in DXO.

...

Stacking several shots reduces the noise and then you can stretch the histogram without destroying the information.

Thanks for posting the single sub; it's pretty much what I expected. I have shot the HH with my unmodified T1i, but the result wasn't nearly as nice as yours, and I needed about 4 minute exposures to get what you were getting in 1 min. Probably mostly due to the different filter in front of the sensor, so you're getting much more in the deep red part of the spectrum.


Gripped 7D, gripped, full-spectrum modfied T1i (500D), SX50HS, A2E film body, Tamzooka (150-600), Tamron 90mm/2.8 VC (ver 2), Tamron 18-270 VC, Canon FD 100 f/4.0 macro, Canon 24-105 f/4L,Canon EF 200 f/2.8LII, Canon 85 f/1.8, Tamron Adaptall 2 90mmf/2.5 Macro, Tokina 11-16, Canon EX-430 flash, Vivitar DF-383 flash, Astro-Tech AT6RC and Celestron NexStar 102 GT telescopes, various other semi-crappy manual lenses and stuff.

  
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luigis
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Jan 15, 2013 23:28 |  #1275

SteveInNZ wrote in post #15492164 (external link)
That's interesting Lugis. Would you mind posting an example of the TIFF that you feed to DSS ?
It's always interesting to hear different approaches to solving the same problem.
How do you polar align your Astrotrac ?

To Align the AT I use another strange method. First I align the mount and the camera using any bright star or planet, I center the star in the AT polarscope and also in the camera.

Then I do a rough align and start taking 1-5 minutes exposures (depends on the lens) and check if the star trails are centered in the camera, if not I make a correction and repeat. Since the camera and the Mount were previously aligned when the trails are dead center in the camera the mount is pointing exactly to the celestial pole.

I live in the South Hemisphere so no Polaris here.


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You don't need a telescope
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