View allAll Photos Tagged DeepSkyStacker
Location: Killygordon, Co. Donegal, Ireland.
Time: 22:00 - 00:00
Date: 21 Sep 2012
Target: ANdromeda Galaxy
Exposures: 8 x Five minute exposures (12Darks) Flats
Equipment:
Mount- Celestron CG5-GT (unguided)
Camera- Self-modified Canon 1000D
Telescope- Celestron Oynx 80ED
Additional- Astronomik cls clip LP filter.
Stacking & Processing: DeepSkyStacker & Photoshop CS5
Picture saved with settings embeTaken using Skywatcher 80ED Pro (.85XFR), Nikon D3300, 363x30" lights (ISO 1600), 100 flats, 110 bias. Stacked in DeepSkyStacker and processed in Photoshop.
Erste Gehversuche mit Deep Sky Fotografie und DSS (Stacker).
Stack von 25 Bilder mit Canon 70-200 /2.8
200mm / f2.8 / 1,6sec / ISO 1250
Aufnahme vom 2019-02-24
Fujifilm X-T10, Samyang 135mm f/2.0 @ f2.0, ISO 1600, 32 x 60 sec, tracking with iOptron SkyTracker Pro, stacking with DeepSkyStacker, editing in GIMP, taken June 2 under Bortle 3/4 skies.
July 31 edit: Reduced green cast.
The faint outer halo is just visible, bringing out the dark ring around the brighter centre of the galaxy.
34 x 1-minute unguided exposures at ISO 6400. Modified EOS 600D & Revelation 12" f/4 Newtonian reflector telescope.
Frames registered and stacked in DeepSkyStacker software; curves adjusted in Canon Photo Professional; noise reduction in CyberLink PhotoDirector.
19 x 1-minute unguided exposures at f/4 and ISO 3200.
Using more exposures helps reduce digital noise, so I also included 3 x 3-minute manually off-axis guided exposures at ISO 1600, f/4, taken in 2015.
Modified EOS 600D & Revelation 12" Newtonian reflector telescope.
Registered and stacked using DeepSkyStacker; curves adjusted in Canon Photo Professional; noise reduction via CyberLink PhotoDirector.
Imaging telescopes or lenses: Skywatcher ED 80/600
Mounts: Celestron Advanced VX Goto
Guiding cameras: Canon 600 astro-modificated
Focal reducers: TS 2" PHOTOLINE 0.8x reducer / flattener
Software: DeepSkyStacker, Photoshop, Fitswork
Filters: Hutech IDAS LPS-D1 EOS
Resolution: 2268x1604
Dates: Dec. 6, 2015
Frames: Hutech IDAS LPS-D1 EOS: 47x55" ISO800
Integration: 0.7 hours
Flats: ~15
Avg. Moon age: 24.51 days
Avg. Moon phase: 25.88%
Bortle Dark-Sky Scale: 7.00
Temperature: 8.00
Used my 150mm apo triplet and 1000D dslr with light pollution filter to collect 3 panels of 6 subs at 5 minutes each at ISO 1600 to create this mosaic of the Pleiades star cluster. Stacked and dark frame calibrated in Deepskystacker,mosaic stitched using IMerge and processed in Photoshop.
Image taken Midnight onwards 5/11/16
12/4/2018 12:46-1:41am MST
Grand Mesa Observatory
14x 240sec
Processing: Photoshop CC, PixInsight
Stacking: DeepSkyStacker
Camera: QHY367C One Shot Color CMOS
Pixel Size: 4.88x4.88
Image Scale (1x1): 1.55 arcsec/pixel
FOV: 127.3 x 190.1 arcmin
Optics: Takahashi FSQ130
Aperture: 130mm
Focal Length: 650mm
Focal Ratio: F5
Guiding: Stellarview 50mm
Mount: Paramount ME
Target:NGC281 Pacman Nebula, a bright emission and part HII region in the constellation of Cassiopeia at about 9200 light years from Earth.
Location:29/12/2020 from St.Helens UK, Bortle 8 under a full Moon.
Aquisition:25x 180s Ha, 25x 180s (OIII), 21x 180s (SII). Total integration 213min.
Equipment:Imaging: Skywatcher Esprit 100ED, HEQ5, ZWO ASI1600MM Pro with EFWmini and Baader-Planetarium narrowband filters.
Guiding: Skywatcher 9x50 Finder with ZWO ASI120MM.
Software:Capture: NINA, PHD2.
Processing: DeepSkyStacker, Siril, Starnet++, Photoshop.
Memories:Still clear frosty conditions with a full Moon.
150 ED Apo f7 triplet,Canon 1000D with UHC filter was used to capture 8 subframes at 16 minutes apiece,stacked in Deepskystacker and processed in Photoshop. Image taken 3/12/16
This edge-on Spiral Galaxy in Coma Berenices (Berenice's Hair) lies at 30-50 Million lightyears distance. Imaged with an Esprit 100mm refractor and Primaluce Lab Cooled Canon 700Da DSLR camera (cooled at -10 Celcius). Optolong -L filter. 34x300 seconds iso 800 and stacked in DeepSkyStacker using 40 Darkframes, 20 Flatframes and 100 Biasframes. Processed in Pixinsight. Dates (2016-04-29+30)
Knight Observatory, Tomar
The Trifid Nebula (catalogued as Messier 20 or M20 and as NGC 6514) is an H II region located in Sagittarius.
Color, cropped image. The color saturation suffered in this image due to lack of an IR filter. That said, tracking was spot on with the image centered nicely in the frame and the surrounding stars are nice and round.
MOUNT: Meade LX850 w/ Starlok
SCOPE: Stellarvue SV105-3SV, 105mm APO Triplet
REDUCER: SFF7-3SV Field Flattener
CAMERA: Canon 550D Full Spectrum Mod by Gary Honis
FILTER: None
CAPTURE: Backyard EOS v3.1.8
STACKING: DeepSkyStacker
RAW EDIT: Adobe Lightroom v4.4
OS: Windows 10
Total Imaging Time: 1:32:30
LIGHTS
20 1-minute @ ISO 1600
11 2-minute @ ISO 1600
10 5-minute @ ISO 800
DARKS
5 1-minute @ ISO 1600
5 2-minute @ ISO 1600
5 3-minute @ ISO 1600
5 5-minute @ ISO 1600
3 10-minute @ ISO 1600
4 15-minute @ ISO 1600
Framing is a little out as this was shot using 2 scopes.
H-alpha data captured by Mick Hyde (9 Feb 14).
H-Alpha - 12x300s & 7x20s
Green - 21x120s & 21x15s (2x2)
Blue - 15x120s & 15x15s (2x2)
Stacked in DeepSkyStacker & processed in PS2.
Camera: Atik 490ex Mono
Filters: Baader H-Alpha 7nm, GB.
Scope: (G&B) Sky-Watcher Equinox 80ED .
Mount: AZ EQ6-GT goto, PhD guided with Orion 50mm guidescope & SSAG.
grazie ad Ale ed a Edo, per l'ospitalita', l'assistenza e la compagnia!! :) un bel regalo di compleanno ragassi!
Telescopi o obiettivi di acquisizione: APO Triplet 130/910 mm
Camere di acquisizione: Canon / CentralDS EOS Astro 50D
Montature: Sky-Watcher EQ6 Pro
Telescopi o obiettivi di guida: 80/600
Camere di guida: lacerta mgen2
Riduttori di focale: Flattener 2"
Software: DeepSkyStacker, Adobe Lightroom 3, Noel Carboni's Astro Tools for PhotoShop
Filtri: Orion SkyGlow 2" Imaging Filter
Risoluzione: 1600x1066
Date: 07 giugno 2013, 08 giugno 2013
Luoghi: Refrancore
Pose:
Orion SkyGlow 2" Imaging Filter: 10x240" ISO1600 bin 1x1
Orion SkyGlow 2" Imaging Filter: 18x360" ISO1600 bin 1x1
Integrazione: 2.5 ore
Dark: ~12
Flat: ~20
M8 (Lagoon Nebula) and M20 (Trifid Nebula) with my 300mm on 29 Aug 2015
89x25s 300mm F5.6 1000ISO on EQ2 mount (and as usual, in my heavy light pollution aera)
You can follow me on Facebook too :p : www.facebook.com/AlexandreDPhotographies
Haven't been around these parts much lately, but managed a couple of images in the meantime.
This is another collaboration between myself and Dave Williams, who provided the Ha used as luminance. My first mosaic, it consists of three frames (well, two and a tiny little strip in between really) processed using photomerge in Photoshop, which I was impressed with. Several sessions between July and September 2013
Meaningless stats follow:
RGB:
SW ED80/EQ5
Canon 500D modded, Baader Neodymium filter
All three frames: 246 subs totalling 13 hours 28 minutes
Acquisition: APT
Guiding: Quickcam Pro4000/9x50 finderscope, PHD
Stacked in DSS and processed in CS5, using photomerge for the stitching together
Ha (Dave Williams):
Usual :)
The Andromeda Galaxy from my backyard in Los Alamos, New Mexico.
Orion ED80
Canon 5D
Celestron CG5 mount.
32 x 1min exposures at ISO 1600
Stacked with DeepSkyStacker.
A spiral galaxy in the constellation Camelopardalis.
It goes by the nickname of the Hidden galaxy as it's a very difficult target for visual and for photography. This is due to it lying pretty much in the same line of sight as the Milky Way and all it's bright stars and dust lanes. Except IC342 which is about 11 million light years further on.
Boring techie bit:
Skywatcher Quattro 8" Newtonian Reflector steel tube with the f4 aplanatic coma corrector, Skywatcher EQ6 R pro mount, Altair Starwave 50mm guide scope, ZWO asi120mm guide camera mini, ZWO asi533mc pro cooled to -10c gain 100, Optolong L'enhance 2" filter, ZWO asiair plus.
Darks, Flats & Bias.
Stacked with DeepSkyStacker and processed in StarTools & Affinity Photo.
An nearby spiral galaxy, only 12 million light-years distant. The active nucleus harbors a supermassive black hole , estimated at 70 million times as massive as our Sun.
This was a test to see what this camera would show of deep-sky objects.
ZWO ASI290mm camera, Explore Scientific 3x Barlow lens, Optolong CLS filter, Explore Scientific ED 80 APO refractor, Celestron Advanced VX EQ mount.
21 45-sec frames
Stacked with DeepSkyStacker, dark frames applied
Post-processing with Photoshop CC 2017.
Also known as Caldwell 49 and NGC 2237.
The Rosette is an emission nebula in the constellation Monoceros some 5,000 light years away.
It's thought to be responsible for the birth of some 2,500 stars. A group of which can be seen near the centre, this is the open star cluster NGC 2244 estimated to be about 4,000,000 years old.
Boring Techie bit:
Telescope: Askar FRA400 with .7 reducer
Mount: EQ6r pro
Camera: ZWO 533mc pro
Filter: Optolong L'eNhance.
Guided and controlled by the ZWO asiair+
Best 90% of 40 light frames 180 seconds each.
Stacked with darks, flats, dark flats & bias with DSS.
Processed using Graxpert, PixInsight & Affinity Photo.
28 x 5 minutes, ISO 800
Sensor temp: +39-43C
60 darks, 60 flats, 100 bias
Equipment: Canon t2i, Orion 8" Astrograph, Atlas EQ-G
Guiding: SSAG, Orion ST80, PHD
Accessories: Astronomik CLS, Baader MPCC
Acquisition: EQMOD, Cartes du Ciel, Backyard EOS
Processing: DeepSkyStacker, Pixinsight, Photoshop CS6 (for mask fine-tuning)
M56 Globular star cluster
About 33,000 light years from us. This star cluster was first spotted by Charles Messier in January of 1779.
I used my Canon 1100D on my 150mm Newtonian
Mount is a HEQ5 pro goto, unguided.
I used 140 light frames of 40 seconds, at ISO 800
80 Bias, 40 Darks & 40 Flats.
Stacked with DeepSkyStacker, then Processed with StarTools.
This is my second attempt at processing this image, I think the result looks better than my last try. I still need more data though.
Canon 60Da
Tamron 24-70mm at 70mm
Astronomik CLS EOS Clip Filter
22x 120 second exposures
ISO 3200 at f/2.8
Tracked using an AstroTrac TT320X-AG (no guiding)
Stacked in Deep Sky Stacker and processed in Photoshop.
Taken in Cabo de Gata National Park in Spain, May 2014.
The center of this view was barely fifteen degrees above the horizon when I started imaging it, I was killing time waiting for my main target to rise in to view.
22 Lights
30 Darks
30 Flats
Known has the Silver Needle galaxy.
This edge-on loose spiral galaxy is about 13.5 million light years from us in the constellation Canes Venatici. It's estimated to be 65,000 light years from end to end.
Captured on the 6th of March 2024.
Bortle 6, poor seeing.
Boring techie bit:
Skywatcher Quattro 8" Newtonian Reflector steel tube with the f4 aplanatic coma corrector, Skywatcher EQ6 R pro mount, Altair Starwave 50mm guide scope, ZWO asi120mm guide camera mini, ZWO asi533mc pro cooled to -20c gain 100, Optolong L'enhance 2" filter, ZWO asiair plus.
120s exposures.
Best 70% of 90 light frames.
Darks, Flats & Bias.
Stacked with DeepSkyStacker and processed in Affinity Photo
For this image i wanted to find a workflow with a minimum number of processing steps. I used DeepSkyStacker with the auto white balance (raw) setting so the raw stack already looked good. In Pixinsight the autostretch was transferred to the histogram function followed by slight curves and green reduction with (0.8) SCNR (So no color calibration, no masking, no noise reduction etc.). Image data: Esprit 100 f5.5 refractor and Canon 6Da, 45 x 300 sec iso1600 with 25 flats and 65 biasframes. This is a small crop of the full field of view.
Knight Observatory Tomar.
As requested by some fellow imagers, here's a look at what each individual narrowband channel has to offer in this part of the sky.
3 panel narrowband mosaic. Exposure times for each panel: 24X600"Ha, 24X600"OIII, and 24X600"SII.
Equipment used:
Canon 85mm f1.8 lens at f4, ZWO ASI183mm camera, AP900 mount, DeepSkyStacker, PixInsight star alignment, Photoshop levels, curves, blending, guided with ZWO174mm and Stellarvue SVR90T.
M13 Globular Cluster in Hercules.
Location:29-05-23 St Helens, UK, Bortle 7. 71% Moon.
Acquisition:19x 180s Red, 20x 180s Green, 20x 180s Blue. Calibrated with Bias, Darks, Flats and Dark flats.
Equipment:Skywatcher 200P Newtonian (modified), EQ6Rpro; Baader MPCCMkIII Coma Corrector; Optolong RGB filters; ZWO ASI533MMpro, EFW, EAF.
Guiding:Skywatcher Evoguide 50ED, Altair GPCAMAR0130M
Software:NINA, PHD2, EQMOD
Processing:DeepSkyStacker, Affinity Photo with NoiseXTerminator plug-in. GraXpert, Siril, AstroSharp.
Pleiades M45 last night. Moon was out, so hard to get detail! 🔭
Stacked 20 lights, iso 800, 180seconds and processed in DeepSkyStacker and Photoshop. Nikon z 50 and Skywatcher Esprit 100.
I tried the globular cluster M13 in the constellation Hercules again this year. This time I used the 1000 mm f/10 Maksutov-Cassegrain telephotolens MC MTO-11CA (nicknamed "Russentonne" or "russian barrel" due to its stocky look and its provenience), together with the Samsung NX30 and mounted onto the Star Adventurer tracking mount. It's actually quite daring to do this, particularly without guiding, since the mount is not really designed for such a long focal length. Nevertheless, I managed to get around 100 reasonably clear 30s subs (although with a woeful success rate of only about 1 out of 3, i.e., 300 acquired, 100 accepted).
Still, I think it was worth the effort. Sharpness is homogeneous and decent after some careful post-processing, and star colours come out nicely after photometric calibration, and -typical for this lens- without any chromatic aberration. The depth of the photo is not awesome with just short of one hour useful integration time, but the galaxy NGC6207 already starts to appear at the top left.
Image details:
Lens: MC MTO-11CA 1000 mm f/10
Camera: Samsung NX30
Mount: Skywatcher Star Adventurer
Guiding: no
Filter: none
Useful subs: 98x 30 s @ ISO3200 (out of 291)
Processing:
Stacking: Deep Sky Stacker with colour calib turned off
Post-processing: SiRiL, fitswork, Luminar 2018
M30 (NGC 7099) is a bright globular cluster located in the southern constellation Capricornus. M30 is about 27,000 light-years from the Earth. I read an abstract titled “Accreted versus In Situ Milky Way Globular Clusters” by Duncan A. Forbes and Terry Bridges (January 2010) in which M30 is listed as a candidate globular cluster that was stolen from another galaxy at some point in time. The term “accreted” means “come or bring together under the influence of gravitation.”
This image is composed of 32 x 15 second images at ISO 3200 with additional dark and bias frames. Tech Info: Meade LX90 12” telescope, Antares Focal Reducer, and Canon 6D camera. Imaging was done on September 1, 2016.
Location: Killygordon, Co. Donegal, Ireland.
Time: 20:30-22:00
Date: 14 March 2010
Target: Orion's Belts (inculding M42 and the Horsehead Nebula)
Exposures: Seven ten minute exposures (6 Darks). 70mins total exposure. Combined with 15 x 30sec and 30 x 15sec exposures for the core of the Orion nebula.
Equipment: Mount- Celestron CG4 (unguided)
Camera- Unmodified Canon 1000D
Lens- 70-300mm Sigma APO working at 135mm
Additional- Astronomik cls clip LP filter.
Stacking & Processing: DeepSkyStacker & Photoshop 7.0
About 9.5 hours of exposure over four days using a Tamron 150-600mm lens set to 300mm attached to a Canon EOS 50D(modified). Taken in strong Los Angeles light pollution under the hated light pole. I really need to invest in a light pollution filter but they're expensive...
Processed using DeepSkyStacker, Photoshop, Topaz Denoise AI, and Lightroom.
Night shift today with my son Kevin. The green dot on the top right is the comet "Leonard". It passes the earth only every 80,000 years (!) and is visible this year from late November to early December. Unfortunately the weather is very cloudy, we have been watching the weather forecast for days and saw last night that this morning could be an opportunity with a lot of luck. So we got up at half past four and searched. After about 30 minutes we had found it. Then made a total of 120 pictures each 4 seconds and stacked them with DeepSkyStacker. Lens was the "bokeh master" Sigma 105/1.4.
While I'm waiting for a new 12mm f2.0 lens, I thought I'd test my new Fuji X-M1 with the kit zoom under the light polluted skies of suburban Melbourne at ISO 6400. Then I pushed and played as much as I dared.
It's not realistic, but it is remarkable what a digital camera and software can do these days.
A photo of our galaxy, the Milky Way, taken just outside our chalet at Crystal Springs Mountain Lodge in Mpumalanga, South Africa. It's amazing what a dark, clear sky can show (along with a little work on the computer). This is 10 photos that I took (each 30 seconds exposure time), stacked together (using Deep Sky Stacker), and then edited a bit in GIMP. My first real Milky Way shot!
If anyone is curious about how I went about getting this shot, I wrote a "how-to" here: digital-photography-school.com/forum/how-i-took/197256-mi...
there the stars are born from the Cocoons.
Covering the large portion of the Milky Way, which is the disk subsystem of our Galaxy, constellation Cygnus houses a lot of gaseous and dusty entities, both bright and dark. This image features among others the tiny bright Cocoon nebula (IC 5146/ Caldwell 19) which is a star formation region and much more prominent dark filament of Barnard 128 (the Snake nebula).
2048 size is quite viewable :)
Aquisition time: 10-11.08.2013 between 23:45 and 01:30 MSK (UTC+4)
Equipment:
Canon EF-S 60mm f/2.8 macro USM lens and Baader Planetarium 2" UHC filter mounted in front of the lens via step-down ring attached to Canon EOS 60D running Magic Lantern 2.3 firmware override riding on Vixen Polarie tracking platform over photo-tripod (alltogether codenamed "Anywhere Is, SWANS configuration").
Aperture 21,4 mm
Focal length 60 mm
Tv = 60 seconds
Av = f/2.8
ISO 4000
Exposures: 58 (plus 27 dark frames and 10 offset frames plus 2 fake flat-field frames).
Processing: Contrast was set to "linear" for all images in Canon DPP and 16-bit outputs were fed to DSS and stacked in Maximum Enthropy mode.
16-bit stacking result was processed in Photoshop with AutoContrast and Levels (namely gamma was set to 3,5) and Curves (skewed sigmoid curve was applied).
Note: I had to crop away some portion at the bottom of the image. The stars were really ugly there.
Canon 135mm f/2 prime lens closed down to f/2.8,SX Trius Pro 694 mono ccd with Baader 7nm Ha filter (1.25") riding on CEM60.
Two pane mosaic consists of 12-18 ten minute subs stacked in Deepskystacker,mosaic stitched using Microsoft ICE and processed in PS CS2.
Taken 22/02/27
Taken on a beach a short walk away, as it's a darker location than at home and with an unobstructed southern horizon over the sea. The conditions, were rather hazy, however, with a thick, dark haze close to the horizon. From home, this haze would have been lit by the floodlights from a car dealership some distance to the south, so the beach was far better in these conditions.
10 x 2-minute exposures at f/2 and ISO 1600; modified Canon EOS 600D & Samyang 24mm f/1.4 lens, on a Vixen Polarie star tracker.
Frames registered and stacked using DeepSkyStacker; initial curves adjusted in Canon Photo Professional; final curves & colour-balance adjusted using Paint Shop Pro; noise reduction via CyberLink PhotoDirector.
'Ave anuvver one :)
Did this the same session as The Ring Nebula. Two images in one session - whatever next? :)
M103 aka NGC 581 is one of the most distant open clusters known, with distances of 8,000 to 9,500 light years from Earth and ranging about 15 light years apart. The cluster is about 25 million years old. Thus spake Wiki.
To me, it's number 27 :)
Taken with a TMB92L, Canon T3i DSLR, and Celestron CG-4 mount. Consists of 34 light and 20 dark frames, each a 45-second exposure at ISO 800, stacked in DeepSkyStacker and processed in Photoshop.
First light with my first ever dedicated astronomy camera. It was a trial and error evening. After a lot of hair pulling and youtube watching, I managed to get most of the equipment talking to each other. So I decided to try it out on an easy target, Messier 82 the Cigar galaxy. I won't bore you with M82 facts . . . this time. If you do want to know, I did post a picture of M82 not long ago taken with my DSLR. If you flick back through some of my recent pictures you'll find some M82 facts there.
And now for the really boring bit, equipment used:
Skywatcher Quattro 8" Newtonian Reflector steel tube with the f4 aplanatic coma corrector, Skywatcher EQ6 R pro mount, Altair Starwave 50mm guide scope, ZWO asi120mm guide camera mini, ZWO asi533mc pro cooled to -10c, ZWO asiair plus.
20, 3 minute exposures bin 1 gain 0, stacked with darks, flats and bias.
DeepSkyStacker, StarTools and Affinity Photo used for processing.
I think I stopped the aperture down a bit too much on this one, causing the diffraction spikes around the Pleiades's brightest stars. Next time, I'll try f/5.6 or f/6.3.
Taken with a Sigma AF 70-300mm f/4-5.6 APO DG at 133mm and f/8, Canon T3i DSLR, and Celestron Advanced VX mount. Consists of 34 light and 30 dark frames, each a 90-second exposure at ISO 1600, and 21 flat frames. Captured with BackyardEOS, stacked in DeepSkyStacker, and processed in Photoshop.
M106 36 x 600 secs in Lum. Added 4 hours to my last image flic.kr/p/sazkxL
Optics: Orion Optics CT8 F4.5 fitted with a Baader Mark-III MPCC Coma Corrector.
Camera: Xpress Trius SX-694 Mono Cooled to -20C
Guiding: OAG witha Lodestar X2
Filter: Baader Lum
Mount: Skywatcher AZ EQ6-GT EQ & Alt-Az Mount connected to the Sky X and Eqmod via HitecAstro EQDIR adapter
Image Acquisition: Sequence Generator Pro
Stacking and Calibrating: Deepskystacker
Processing: Pixinsight 1.8, Photoshop CC
Imaging telescopes or lenses: Skywatcher ED 80/600
Imaging cameras: Canon 600 astro-modificated
Mounts: Celestron Advanced VX Goto
Software: DeepSkyStacker, Photoshop, Fitswork
Filters: Hutech IDAS LPS-D1 EOS
Resolution: 2268x1116
Dates: Sept. 11, 2015
Frames: Hutech IDAS LPS-D1 EOS: 128x60" ISO800
Integration: 2.1 hours
Flats: ~15
Avg. Moon age: 27.47 days
Avg. Moon phase: 4.72%
Bortle Dark-Sky Scale: 7.00
Fujifilm X-T10, Samyang 135mm f/2.0 @ f2.0, ISO 1600, 25 x 60 sec, tracking with iOptron SkyTracker Pro, stacking with DeepSkyStacker, editing in GIMP, taken May 11 under Bortle 3 skies with thin cloud cover.
My first attempt to capture Orion nebula
Canon 500D
Sigma 120-400 @400mm
ISO 800
f 7.1
frames of 60 - 45 - 30 seconds
total exposure about 55 minutes
dark bias flat
28x30sec at ISO 12800
180mm f/4
Nikon D750
Clear sky, no moon, new camera, and news of a comet in Taurus -- who cares if it's a little cold out there....
Posted to Slider's Sunday, even though the post-processing is relatively mild by that group's standards. In particular, let me emphasize that Lovejoy and the Pleiades really did share this little section of the sky. But posted to SS because it used a new (to me) color processing strategy.
Averaged the multiple (28) images in DeepSkyStacker, and imported the result into the Gimp, along with -- and this was the innovation -- an extra copy of the last exposure as a new layer. I roughly white-balanced out the skyglow in the new layer, smoothed it, bumped up the contrast (which has the effect of increasing saturation), and made this the "color" layer to emphasize the actual green and blue colors of the comet and stars.