22 lights (30s ISO1600) 10darks 20 flats 20 bias. Canon EOS 450D prime focus Skywatcher 150 Explorer Newtonian. DeepSkyStacker > PixInsight > Photoshop CS5

My 2nd try at M57. 19x7 second subs from SC 1.5 modified SPC900NC webcam processed in DeepSkyStacker and Paint.NET

Camera: Meade DSI Color II

Exposure: 47m 30s (57 x 30s) RGB + (48 x 30s)L

Focus Method: Prime focus

Telescope Aperature/Focal Length: 203×812mm

Mount: LXD75

Telescope: Meade 8" Schmidt-Newtonian

Guided: None

Stacked: DeepSkyStacker

Adjustments: cropped/leveled in Photoshop

Location: Flintstone, GA

This image is for a DeepSkyStacker tutorial on my blog, Flintstone Stargazing: flintstonestargazing.com/2009/06/26/my-quick-deepskystack...

Here an edge-on galaxy in the constellation of Andromeda. North is to the right.

Imaged through an 8 inch f/8 GSO RC on an EQ8. Camera was a modified Canon EOS 700D with cooling, which kept the sensor at -15 degree Celsius. No filters were used. 37 x 5 minute exposures were stacked with DeepSkyStacker in auto adaptive averaging mode (dark, flats and bias correction applied) and with the 2x drizzle function enabled and cropped. B-V colour calibrated with Regim and further processed in PS (background adjustment, lightened with curves and increase in vibrance). A very slight noise reduction and sharpened with Noiseware Community.

The next post shows the field of view with my full APS-C chip of my camera.

Localisation : CastresmallObservatory (Castres, Tarn - France)

Acquisition Date : 2017-03-17

Auteur/Author : ROUGÉ Pierre

Mouture/mount : Orion Atlas EQ-G

Tube/Scope : Newton Orion 200/1000 (f/5)

Autoguiding : Skywatcher Synguider (v1.1) & Meade ETX 70/350 mm

Camera : ATIK 383L+ (www.astrosurf.com/apam/)

Exposure : 49 minutes [49 subexposures of 60 sec each (selected from 49)] Binning 1x1

Calibration : Dark & Bias : 9/0 - Flat & Dark-Flat : 0/0

Temps/Weather : Bonne transparence. Vent nul. T=12°C. Humidité faible.

Constellation : Monoceros / Licorne

Software Used : Astro Photograph Tool (v3.20), DeepSkyStacker 3.3.6, Pixinsight LE, PhotoShop 7, xnview

NGC2244

Information du catalogue: NGC

New General Catalog

Magnitude: 4.80

Luminosité de surface: 11.44

Dimension: 24.0 x 24.0 '

Description: Cl, beautiful, st sc (12 Mon)

Constellation: Licorne

Imaging data: 33 x 5 min. exposures through a GSO RC 8" f/8 with a PrimaLuceLab 700Da cooled at -10 degree Celsius; ISO 3200; no light pollution filter. Stacked with DeepSkyStacker in sigma clipping mode and further processed in PS, Fitswork4 and Noiseware Community.

North is on the right.

View on Black

Decided to try my 50d and Canon 70-200 lens out on some stars tonight, so i pointed my camera at the brightest object in the SE sky...

Canon EOS 50D, hooded Canon EF 200mm ƒ/2.8L USM II prime @ ƒ/4.5, ISO 12800, 1/20 sec. per exposure, on a tripod and 28 exposures

Knowing almost nothing about our solarsystem and stars, it seems like I got lucky and hit Jupiter and 4 moons. I installed deepskystacker and Microsoft WorldWideTelescope (which is really cool!) and tried for several hours to find out just what I shot. After playing with the image in Lightroom2, I think I ended up with real objects...

Going to try for more stars tomorrow using deepskystacker procedures...

Canon 6D, Staradventurer, 50 mm f1.8. 7x180 s. ISO 500. Region, sctutum, Sagitario. DeepSkystacker, Lightroom.

The previous M57 photo, upsampled 3x. Blown up to show the central star within the planetary nebula

Stars are squiggly from a poorly aligned telescope mount, and from the target being too far from the center of the image.

Info:

Object: M45, Pleiaden

Telescope: Skywatcher explorer 150p f/5 met Baader MPCC

Camera: 450D Full Spectrum

Mount: Heq 5 pro

Guiding: TSOAG9 met Orion SSAG

Imaging time: 27x10min = 4hr30mn totaal.

Darks: 3x10min

Flats: 21x10min

Filter: Hutech IDAS LPS-P2

ISO: 400

Stacked in: DeepSkyStacker (DSS)

Processing: Photoshop CS6

Location: Sterrenwacht Halley

Date: 27-9-2013

6 images stacked in Deep Sky Stacker provide a decent view of this winter cluster of stars.

Some of the Pleiades nebulosity is hinted at in this image too - I was not expecting that! Especially considering this was taken:

(a) through wispy clouds

(b) in Calgary city limits from my back yard

5 Light images (the stars themselves)

1 Dark image (photo with lens cap on; to identify hot camera pixels)

First time using DSS (default settings applied)

Nikon D7100 + iOptron Skytracker

Nikkor 70-200 f/4 @ 200 f/4

ISO 1600

About 2 1/2 minutes exposure in total

Each photo 25-30 seconds (bulb)

DSS is failing to end the calculation of stars in the image and end with an out of memory error.

Photographed in Cambridge, MA. Stacked from 400 frames of 2.5 sec. exposure at F/5.6, 135 mm focal length, ISO 1600.

M13 Globular Star Cluster

5 x 10-minute exposures at ISO 1600.

Canon EOS 600D (modified by DSLRAstromod), Meade ED 127mm f7.5 telescope, manually, off-axis guided. Sub-exposures registered and stacked using DeepSkyStacker software.

The stars are rather bloated, especially towards the lower left, as unfortunately the camera was not fitted exactly square on the telescope. I didn't realise until I went to process the images the next day. I've done this before, ironically the last time I photographed this same object!

12x 60s subs stacked in DeepSkyStacker (10 Darks, 20 Flats, 20 Bias) processed in PixInsight and Photoshop. Canon EOS 450D DSLR prime focus Sky-Watcher 150P Newtonian EQ3-2 mount. Baader Neodymium filter.

13 minuti totali di esposizione a 800 iso, d3000 con 18-55 a 55mm, f 5,

This is the famous Whirlpool galaxy in Canes Venatici.

Imaged through an 8 inch f/8 GSO RC on an EQ8. Camera was a modified Canon EOS 700D with cooling, which kept the sensor at 0 degree Celsius. The ambient temperature was between 26 and 28 degree Celcius (about midnight). The transparency in the first night of imaging (25-26/06/2022) was pretty bad and in fact there was a moderate Saharan dust event. The backgrounds of the frames I took in the second night (22-23/07/2022) were much darker. I still combined both sets.

No filters were used.

The 57 x 3 minute exposures (total of 2h51m) were stacked with DeepSkyStacker in sigma clipping mode (dark, flats and bias correction applied). Regim didn't want to load the image, which I carefully flattened in Fitswork before, so I didn't do a B-V colour calibration, but relied on my white balance settings. Nearly all further processing was done in Affinity Photo in the following order: 1. background neutralisation and level adjustment; 2. increase in vibrance and saturation; 3. adjustment of gamma value and black point; 4. slight denoise of the entire picture; 5. sharpening of galaxies only with the clarity tool; 6. crop. In the end another slight noise reduction with Noiseware.

As usual, it could have done with more exposure time to bring better out the star tidal tails.

Having been given “the day off” from looking after our new arrival, I

have just spent the entire day doing astro related stuff… its been

awesome :)

Anyway, one of the things on my to-do list was to spend to more time

processing my Rosette data from a while back, taking on board the

various comments that have been made about it. Just finished 4 hours of

playing with this, and included the following improvements:

- better contrast in the rosette itself

- less “salmon pink”, more red

- removed the cyan halos around the stars in the left of the image

- added a tiny amount of the Ha into the blue channel (about 12% looked

about right)

Also took on board some of the items covered at the SGL Imaging day,

specifically the keeping color saturation without losing detail, and the

Shadow/Highlight tool, plus managed to get a good star reduction on the

image.

So, here we go….

Ha Data

Mount: EQ6 via EQMOD

OTA: Borg 77EDII @ f/4.3

Guiding: SW ED80 + SX Lodestar + Maxim

Imaging: Starlight Xpress M25C + MaximDL, 11×900s, Astronomnik 13nm Ha

(101 bias, 101 flats)

Orchestrated: CDD Commander

Stacked: DeepSkyStacker

RGB Data

Mount: EQ6 via EQMOD

OTA: Borg 77EDII @ f/4.3

Guiding: SW ED80 + SX Lodestar + Maxim

Imaging: Starlight Xpress M25C + MaximDL, 19×600s, Hutech IDAS LPR (101

bias, 101 flats)

Orchestrated: CDD Commander

Stacked: DeepSkyStacker

Post Process: PSCS2 + PixInsight + Registar

Bit of an accident this one, I was waiting for cloud cover to go so I swung the scope to a clear spot, then I lost this due to trees.

Quite a bright target this :)

Date:14/11/2009

Location:Brisbane Australia

Imaging Camera: Canon 1000D prime focus

Imaging Scope: 200mm Newt

Focal Length: 1000mm F5

Guide Camera: SSAG

Guide Scope: Orion 80mm F5 Refractor

Guided with PHD Guiding

Mount: Celestron EQ5 GT

Exposure: 16 min (8x2min) full colour

Darks: 4x2min

ISO: 800

Processing: DeepSkyStacker, CS3,

Back to NGC 7000 / The Cygnus Wall after two years!

16x10 minute lights = 2 hours 40 mins total integration

WO z103

294mc Pro

L-eXtreme dual band filter

iEQ 30 Pro

Generic 215mm focal length guidescope

120mm mini guide camera

Stacked using DeepSkyStacker In Photoshop, Separated the H alpha and Oiii signal (red and green channels respectively).

Made a synthetic Sulphur signal by combining the H alpha and Oiii and combined them all back together after removing stars in a H"S"O palette

Stars extracted from original stacked image (without channel separation) and overlaid over the H"S"O composite.

Final touches in Lightroom.

Reprocessed with DeepSkyStacker.

50x20 sec stack in DSS with Photoshop post process

150mm F5 Newtonion

1st attempt at using Hubble Space Telescope palette.

Total 3hrs 10 min

H-Alpha - 8x600, Oiii 6x600 & Sii 5x600s.

Stacked in DeepSkyStacker & processed in PS2.

Camera: Atik 314L+ Mono

Filters: Baader H-Alpha 7nm, Oiii & Sii.

Scope: Sky-Watcher Equinox 80ED .

Mount: AZ EQ6-GT goto, PhD guided with Orion 50mm guidescope & SSAG.

M106 (NGC4258), NGC 4217, NGC 4220, NGC 4226, NGC 4231, NGC 4232, NGC 4248

Date: 06-02-2013

Telescope (Lens): Orion 8in f/3.9 Newtonian Astrograph

Addition Optics: Baader Planetarium RCC1 Coma Corrector

Camera: Canon XSi

Exposures: 55 x 180 sec (ISO 400) + Darks x15 ,Flats x20, & Dark Flats x15, & Bias x 10

Processing: DeepSkyStacker, Photoshop

Mount: Atlas EQ-G

Tracking: EQMOD / Stellarium / PHD Guiding

Guidance Camera: Logitech 3000 Pro

Guidance Scope: Celestron 9x50 Finder

Astromomy weather as forcasted by Canadian Meteorological Center:

Cloud Cover: Clear

Transparancy: Average

Seeing Category: IV (Above Average)

Temp: 59°F

Humidity: 78°

Light Pollution: "Red" - Based on Light Pollution Map

Moon: 19 Days old- 79% illuminated on 7/23/2016

Taken with:

Telescope: Explore Scientific 80ED

Camera: Nikon D5300 (unmodded)

Mount: Orion Atlas Pro (unguided)

Software: DeepSkyStacker, Lightroom

Accessories: ES Field Flattener

This is M27, the Dumbbell Nebula. This image paints a similar future of our very own Sun. Billions of years from now, the Sun will loose its outer layers and expell them into space, just as this star did. A fellow astronomer a few hundred to a few thousand lightyears away orbiting a different star, may see a similar scene peering towards us. By then, the year will be roughly 5 billion A.D.

06/16/12

Joshua Tree National Park, CA

23 frames = 11 min 0 second exposure ISO 6400

Processed in DeepSkyStacker and Gimp 2

6" Meade Newtonian Reflector LXD75 EQ Mount

Canon Rebel T3 DSLR

NGC7023 Iris Nebula

Date: 09-08-2012

Telescope (Lens): Orion 8in f/3.9 Newtonian Astrograph

Addition Optics: None

Camera: Canon XSi

Exposure: 21 x 300 sec (ISO 800) + Darks x10,Flats x10, Bias x10, & Dark Flats x10

Processing: DeepSkyStacker, Photoshop

Mount: Atlas EQ-G

Tracking: EQMOD / Stellarium

Guidance: PHD Guiding - 9x50 Finderscope w/ Logitech 3000 Pro Webcam

Astromomy weather as forcasted by Canadian Meteorological Center:

Cloud Cover: Clear

Transparancy: Excellent

Seeing Category: IV (Above Average)

Temp: 65°F

Humidity: 60°

Light Pollution: "Blue" - Based on Light Pollution Map

Celestron Nexstal 130 Slt

Canon 10D

DeepSkyStacker

Photoshop

49*30sec

iso400

10 dark

10 flat

I think focus wasnt perfect, and I didnt bother to edit this much

20 lights (20s ISO800) 20 flats 11 darks 20 bias. Canon EOS 450D prime focus Skywatcher 150 Explorer Newtonian. Calibrated and stacked in DeepSkyStacker. Processed in PixInsight and Photoshop CS5

----- Original Message -----

From: Lance Taylor

To: Astronomy Discussion list

Sent: Sunday, August 30, 2009 12:01 PM

Subject: [Astro] Astro Image Stacking Software & Techniques

I was curious what the other astro imagers here used for stacking DSLR images? I have come across a few free packages beside the pricey Registax that seem to do the job well, but am noticing that the final image rendered is lacking any colour output. Might be the operators fault though. :-)

Iris: www.astrosurf.com/buil/us/iris/iris.htm

DeepSky: deepskystacker.free.fr/english/index.html

Rot'n'Stack: www.gdargaud.net/Hack/RotAndStack.html

RegiStar: www.aurigaimaging.com/

Also, I can't seem to get Registax 5 or Astrostack to work with DSLR images. Is there a size limit for the files - anyone know? If I scale them down to 1024x768 they seems to stack.

Registax: www.astronomie.be/registax/

Astrostack: www.astrostack.com/

GScratch and Dave - have you checked this one out yet?

Keith's Image Stacker - Mac OSX: keithwiley.com/software/keithsImageStacker.shtml

Oh yeah is anyone else on the group here using William Bells's AIP4WIN? I picked up the book a few years with the CD. Uhm... cool software as well... with way to many options. :-)

AIP4WIN: www.willbell.com/aip/index.htm

Finally, this book is also great, looking to get his Wide Field book next.

www.willbell.com/DigitaAstrophoto/Default.htm

LT

--------------------------------------------------------------------------------

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鏡筒: 8cm F6 (笠井 BLANCA-80EDT) + 0.6x レデューサー

カメラ: OM-D E-M5

赤道儀: スカイメモS

288mm, F3.6, 20s, ISO1000 を DeepSkyStacker で8枚コンポジット。LightRoom CC でトリミング、トーンカーブ調整等。

6x180s

Canon EF 50 mm f/1.4 (f2.2)

This galaxy is considered to be one of the brightest galaxies that Charles Messier missed or chose not to add to his famous catalog. It's around 50 million light years from earth.

23.5 Minutes of exposure in 47x 30 second shots, shot on a Canon T1i at prime focus on a Meade 10inch SN-10AT telescope with a light pollution filter. Exposures stacked in Deep Sky Stacker. Another 19 exposures were thrown out due to vibrations or tracking errors in the telescope mount.

This one really needs longer exposures. To show the arms of the galaxy even as faint as they are required a lot of stretching, bringing out a lot of noise in the image.

If you view the larger size on black, on a bright computer screen, and squint the right way, you will notice 7 or 8 much smaller galaxies, 3 or 4 are located near the big galaxy ... but probably 10x further away.

鏡筒: 8cm F6 (笠井 BLANCA-80EDT) + 0.6x レデューサー

カメラ: OM-D E-M5

赤道儀: スカイメモS

288mm, F3.6, 20s, ISO1000 を DeepSkyStacker で4枚コンポジット。LightRoom CC でトリミング、トーンカーブ調整等。

M82 in Ursa Major.

C8 EdgeHD at F10

modded Canon XSi at ISO 1600

16x11 minute exposures. 15 flats, 17 darks.

Astronomik CLS-CCD clip in filter

Stacked and processed in PixinsightLE, DeepSkyStacker and Photoshop.

-23C at the time of this shot. Fantastic seeing, with poor transparency.

I managed to snag Comet Hartley 2 with the Nikkor 50mm f/1.4 AI lens. The comet is that green fuzzy just below Cassiopeia near the centre-right of the photo. It's nearing its closest approach to Earth on October 20 at 11 million miles away. There are reports it's beginning to sprout a tail.

A widefield image of the Elephant's Trunk Nebula... I wanted to capture the dark nebulosity surrounding IC1396 and show the scale of this massive nebula.

Modified Canon 350D and 200mm f4.0 EF lens on a CG-5 mount guided with Phillips webcam ST80 and PHD.

3hrs 30mins, 12x10mins, 18x5mins, darks and flats applied in DeepSkyStacker tweaked in CS3 + Noel's actions.

Quelques tentatives réussies de capturer la comète C/2012 S1 ISON. Malheureusement, la queue ne se détache que très mal du fond du ciel. Les raisons peuvent être le début de l'aube et la présence de la Lune presque pleine, bien qu'à l'opposé. Je tenterai de combiner les 17 fichiers d'assez bonne qualité avec Deepskystacker ou IRIS.

Some attemps of capturing Comet C/2012 S1 ISON. Unfortunately, the comet's tail doesn't detach that clearly from the background sky. Reasons can be the approaching dawn and the almost full Moon, although it was far in the sky. I will try to stack the 17 good files I made in Deepskystacker or IRIS.

I imaged the comet again, but I think nothing was gained over the last photo from 10 March. It wasn’t helped by the drifting high cloud and numerous satellite trails, traces of all of which can be seen in the final result, despite being averaged over 13 frames. 2 tails are visible, however - the ion tail towards the 1 o’clock position, and the fainter dust tail towards 2 o’clock.

13 x 30-sec exposures at f/4.5 and ISO 3200 with an EOS 600D and Zeiss Jena 135mm f/3.5 lens on a Vixen Polarie star tracker. The frames were stacked on the comet in DeepSkyStacker, with curves adjustment and further noise reduction in post-processing. Also Starnet++ software was used to temporarily separate the stars and comet and prevent the stars bloating when comet contrast is stretched; this has revealed more of the tail that would otherwise be lost in the star background.

100 minutes of integration on M1.

The asteroid left of center is 1997 WN35:

Object (33078) 1997 WN35 RA 05 34 23.2 DEC +22 20 36 Magnitude 19.9 Motion in Arcsecs/Hr: RA 76+ DEC 0-

I've recalibrated and stacked and worked this image a few times since I first attempted it. Each time I come back with one more bit of knowledge.

This time, I'm still calibrating with Maxim. What's new is that I'm calibrating with 2C increments. Thus, for the 10 lights, there's two sections for calibration. This significantly reduces the over and undercorrection that I was seeing before. Also, it makes the post process a lot easier to manage.

Same details as before:

10 lights total, each at 600 seconds and 400 ISO.

Scope was the Orion 127mm Maksutov Cassegrain guided by a ST80 with SSAG.

64 darks for 14-15C

32 darks for 16C

256 bias

15 flat

Calibrated to make FITs in Maxim. Then debayered and stacked in DSS 3.3.3 beta 47 with kappa 2 5 iterations.

Processed in PI: dynamic crop, dbe, masked stretch, masks made from extrated lightness, these maskes used on atrous and deconvolution, multiscale media transform used on the remaining layers to boost the brightness of the nebulosity, unsharp mask, new mask from lightness, curves used on positive and inverse of this mask to bring up saturation and rgb as well as drive the background lower.

Exported to LR3 for upload.

Here's the platesolve:

Referentiation Matrix (Gnomonic projection = Matrix * Coords[x,y]):

+0.000009018848 +0.000208680214 -0.282411212779

-0.000208635884 +0.000008952885 +0.388572952899

+0.000000000000 +0.000000000000 +1.000000000000

Resolution ........ 0.752 arcsec/pix

Rotation .......... -92.472 deg

Focal ............. 1665.23 mm

Pixel size ........ 6.07 um

Field of view ..... 48' 2.7" x 31' 50.5"

Image center ...... RA: 05 34 32.008 Dec: +21 59 10.65

Image bounds:

top-left ....... RA: 05 33 18.711 Dec: +22 22 28.49

top-right ...... RA: 05 33 28.047 Dec: +21 34 29.13

bottom-left .... RA: 05 35 36.340 Dec: +22 23 50.62

bottom-right ... RA: 05 35 44.903 Dec: +21 35 50.79

EXIF - L-extreme: 180X120" (6h) + Astronomik L-2: 30X20" (30min)

Calibration: Flats - 30+30, Darks - 60

Camera: ZWO ASI294MC Pro (cooled to 0°C)

Filters: Optolong L-extreme & Astronomik L-2 Luminance UV/IR Block 1.25"

Main optics: Sky-Watcher Explorer 200P

Mount: Sky-Watcher EQ6-R Pro

Guiding: Artesky UltraGuide 70 + ZWO ASI120MM Mini

Controller: ZWO ASIair Pro

Electronic focuser: ZWO EAF

Software: DeepSkyStacker + Pixinsight + Photoshop

Location: Medviđa, Croatia

First test of my new AT72EDII. Image is cropped (which is just as well; I don't have a field flattener... yet). You can start to make out the Running Man in the upper part of the frame.

40 subs at 30", ISO800, unguided

20 darks

30 bias

No flats

Shot from my back yard in Bortle 7 skies.

Camera: D90

Telescope: Astro-Tech AT72EDII

Mount: SkyView Pro

Stacked with DeepSkyStacker

Levels/curves/noise/sharpening with Affinity Photo

Unmodified EOS 40D & Pentacon 300mm f4.

3 x 5-minutes at ISO 1000 & 8 x 4-minutes at ISO 1600, f4. Lens piggybacked on C8 telescope for manual guiding. Images registered and stacked in DeepSkyStacker software.

Canon 400d, 130m explorer, deepskystacker. 20 x 90sec sub 10 x dark

Canon 550d with CGEM DX 1100HD. Stack of 8 using Deepskystacker. The 8 were taken over two sessions, each at 15 min exposure (with 15 min dark frame) at ISO 800.

Second session had much worse seeing with FWHM at >11 pixels with the first being at <8 pixels.

6 usable lights (60s), 10 darks, 20 flats, 20 bias. Canon EOS 450D DSLR prime focus, ISO1600. Baader Neodymium filter and coma corrector. Sky-Watcher 150P Explorer on EQ3-2 mount. DeepSkyStacker > PixInsight > PhotoShop. Decided to have another go as disappointed in previous attempt at processing

This is a cropped and rotated image from the M51 Wide Field picture. It was cropped to show more of the galaxy details.

Taken by Doug Spalding on April 10, 2011 near Butler, Missouri using an SBIG8300C camera mounted on a CGE1100 Telescope using Hyperstar (F/2). This is the sum of 5 of 6 ten minute images, stacked using DeepSkyStacker. The image was then processed with Maxim DL and Photoshop CS2.

This was shot vertically... I have it horizontal so it displays larger on the screen.

1 sec. / ISO 5000 / 300mm / f5.6

90 light frames

15 each - dark, flat, bias

Shot with a Nikon D600 on a tripod without an equitorial mount from my driveway in light polluted Parma, Ohio.

Stacked and aligned using Deep Sky Stacker.

Processed in Photoshop CC and Camera Raw.

Spikes added using Star Spikes Pro 3.

Here's a version showing Jupiter with, I think, 3 moons. The inset is @ 100% out of my camera: www.flickr.com/photos/alanstudt/16696092023/

Veil Nebula NGC 6992

Taken at Calstar 2012 on the nights of September 13 and 14 while I was waiting for other targets to rise.

Heavily cropped due to poor framing. I would have liked to include more of the original mosiac, but the amp glow on the edge makes it difficult to smooth out these errors.

Stack of 21 subs of 10 minutes at 400 ISO using the cooled, full-spectrum Pentax K10D on the Stellarvue SV4 telescope at prime focus. Temperature range varied from 24-29C so I had to match darks with groups according to temperature. 100 total darks used to correspond to the range.

Stacking done with DSS 3.3.3 beta 47. PI 1.7 used to crop, annotate, apply DBE, masked stretch, and some NR. Final step in LR3.

I probably will return to this data set to see if I can reduce the size of the stars. There was some trailing caused by PEC and poor polar alignment.