View allAll Photos Tagged deepskyobject
My second attempt at shooting the constellation Orion seen here rising over the horizon in Coudersport, PA.
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 :)
2 image mosaic of the center of the galaxy. Star Antares is the brightest star nearest to the silhouetted pines in the foreground.
Image data_
2 images 15/25 sec
ISO3200
50mm focal length
aperture F1.8
Les Pléiades, ou amas M45, sont un amas ouvert d'étoiles dans la constellation du Taureau.
L'amas s'étend sur 2°, soit l'équivalent de quatre fois le diamètre apparent de la Lune.
L'origine du nom « Pléiades » provient de la mythologie grecque : les Pléiades sont sept sœurs, filles d'Atlas et de Pléioné : Astérope, Mérope, Électre, Maïa, Taygète, Célaéno et Alcyone.
Newton SkyWatcher 200/1000
Monture EQ6-r pro
Canon 1000D défiltré partiel
Correcteur de coma Baader MPCC Mk III
Autoguidage OAG + ZWO ASI 290mm mini
ZWO EAF
ASIAIR Pro
Traitement PixInsight + Photoshop CC
Mosaïque de deux panneaux :
Panneau 1 :
Prise le 10/10/2020 :
27*300" => 2h15'
Panneau 2
Prise le 08/11/2020
34*300" => 2h50'
TOTAL : 5h05'
IC 410, ou la nébuleuse des Têtards, est une nébuleuse en émission située à environ 12 000 années-lumière de la Terre dans la constellation du Cocher.
La nébuleuse contient en son cœur l'amas ouvert NGC 1893, sculptant les gaz chayds d'hydrogène et d'oxygène alentour.
Palette HOO
Newton SkyWatcher 200/1000
Monture EQ6-r pro
ZWO ASI2600 MC pro
Correcteur de coma Baader MPCC Mk III
ZWO OAG + ZWO ASI 290mm mini
ZWO EAF
ASIAIR Pro
Filtre Optolong l-eXtreme 2"
Traitement PixInsight + Photoshop CC
Session 1 le 27/02/2021 :
51*300" => 4h15'
Gain 100 - Temp -20°C
Session 2 le 28/02/2021 :
52*300" => 4h20'
Gain 100 - Temp -20°C
Session 3 le 01/03/2021 :
52*300" => 4h20'
Gain 100 - Temp -20°C
TOTAL 12h55'
La Comète C/2020 F3 Neowise de passage au dessus des alignements de Carnac.
Canon 1300D stock
Samyang 14mm f/2.8
ISO 800
20*15s
2*30s pour l'avant plan
Omegon Mini Track Lx2
Traitement Sequator Lightroom et Photoshop CC
This was shot from my backyard in Long Beach, CA. Whenever I target deep sky objects from my light polluted home skies, there are always significant gradients to deal with in the final image. With this particular data, that is made worse by the image being a mosaic. I shot this in March 2017, and over the past two years, I think I learned enough to minimize their effect. M53 is in the upper right, and NGC 5053 is in the lower left.
Each panel is a stack of 120 s exposures shot with a Celestron Edge HD 9.25" at f/2.3 with Hyperstar and an Atik 314L+ color CCD. Initial pre-processing in Nebulosity, stacking and initial processing in PixInsight; final processing in PS CS 5.1.
Image center (J2000) is at:
RA 13h 14m 25s
DEC +17° 54' 41"
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.
Orion nebula, Orion's belt, horsehead nebula, and flame nebula (wide field)
Total exposure: 13 min 30 sec
Light frames : 27 x 30",No Dark,flat frames
ISO: 800
Camera: Nikon D7500
Lens: Samyang 135mm @f2.8
Equatorial Mount: Ioptron Skyguider pro
Bortle class: 4
Stacked and processed using Deepsky stacker, Siril, and PS
Image processing : Background extraction,Arcsinh/hyperbolic sine stretch,
and Green noise removal
I have the cluster bug :)
Spent a good amount of time recently testing a bit of kit that effectively converts my EQ5 to a Goto, and now using EQMOD in conjunction with PHD for guiding. Working well, and for £90 (and in the true spirit of budgetastro) I'm more than pleased :)
Found this cluster while I was zipping around the heavens playing with the Goto, and fell in love with it. M35, aka NGC 2168 in the foreground, is about 2.8K light years away, quite young at 150m years (hence the blue stars) and contains about 2500 stars. NGC 2158 (above right of M35) is about 10K lights years away and is ten times older than M35 (hence the orange stars). It contains many more stars than M35 but in roughly the same volume of space (30 ly wide), so looks more like a globular cluster. Nice contrast :)
SW ED80/EQ5
Canon 500D modded, Baader Neodymium filter
56 x 180 sec subs, iso 800
Acquisition: APT
Guiding: Quickcam Pro4000/9x50 finderscope, PHD/EQMOD/AstroEQ
Stacked in DSS and processed in CS5.
NGC 7635, ou nébuleuse de la Bulle, est une nébuleuse d'environ 10 années-lumière de diamètre située dans la constellation de Cassiopée.
Elle est formée par le vent stellaire créé par l'étoile SAO 20575 à une vitesse de plus de 1 700 km/s.
A gauche l'amas ouvert Messier 52
Newton SkyWatcher 200/1000
Monture EQ6-r pro
Canon 1000D défiltré partiel
Correcteur de coma Baader MPCC Mk III
Filtre Ha EOS Clip Astronmik 12 nm
Autoguidage OAG + ZWO ASI 290mm mini
ZWO EAF
ASIAIR Pro
Traitement Pixinsight + Photoshop CC
Mixage Ha-RHaVB
Ha le 28/11/2020 :
110*300" => 9h10'
ISO 800
Couleur le 08/12/2020
8*300" => 0h40'
ISO 800
TOTAL 09h50'
A new object for me, and interesting looking area with slight reflection nebula in places, i'm sure there is more than ive been able to pick up but i managed to get some blue at the top there :) there is also dark nebula in near-black and obviously the red emission nebula forming the famous cave shape near the bottom.
ED80 / 350D / EQ6 - CLS FILTER
6 x 5min 4 x 10min lights / 6 darks and a batch of flats and bias frames (for a change :) )
Reprise du traitement de la grande nébuleuse d'Orion M42 avec Pixinsight
Publication originale du 21/11/2019 : flic.kr/p/2hNUMvL
Newton SW 200/1000 sur N-EQ5
Canon 1000D défiltré partiel
Correcteur Baader MPCC MkIII
ISO 1600
221x30" => 1h50'
DOF 60-50-15
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山上的七姊妹
提起深空拍攝十居其九會認為是很困難的，還要花上許多時間去拍攝及處理，加上這些深空天體再過數千年也不會有變化，只要有不錯器材，加上天氣及時間的許可，很容易便會得到一張美麗的深空天體相片。想要有變化就要像風景一樣加入不同地景去配合，令深空天體構圖不再死板。
往時就曾經嘗試多個不同的深空及地景組合，但只屬於 Wildfield 方式拍攝，深空天體不太突出，被地景搶了風頭。今次就嘗試用上 135mm 鏡頭找尋簡單地景，深空天體也可以變得大一點。剛好在陰那山的第一晚設定好器材後，便看見七姊妹星團在飯堂上的水庫探頭而出，用上 5 分鐘時間將其捕獲下來，再花上 30 秒地景，簡單地在 Photoshop 處理一下便得到這張「山上的七姊妹」。
Photo by siuba
日期：2015/10/16 @ 梅州陰那山
相機：Sony A6000
鏡頭：Samyang 135 mm f/2.0 ED UMC
追星儀：Kenko Skymemo RS
設定：ISO 1600, 300s x1 (30s x1 地景)
香港拍攝難度：★★ (五星最難)
建議鏡頭焦距：135 ~ 300mm
適合拍攝月份：9 月 ~ 12 月 (香港)
This was inevitable - got to leave it alone now.
Little less brutal, and easier on the blue. Also, I used lens correction in the previous version to compensate for the lack of flattener. That distorts the entire image though, and made the galaxy a little wide of girth! Better in this version I think (if you don't look at the corners) :)
SW ED80/EQ5, cropped
Nikon D70 modded, Baader Neodymium filter
18 x 4 mins iso 1600
30 x 6 mins iso 1250
22 x 10 mins iso 800
Guiding: Quickcam Pro4000/9x50 finderscope, PHD
Stacked in DSS and processed in CS5
Reprocessed again here :)
I managed to add 3 hours to my previous version of this on Saturday night, but that has little to do with the above result. This is my first attempt at collaboration with my good friend Dave Williams (whom I have never met, as he lives in the frozen northern wastelands known as Manchester). Dave works in NB, and provided Ha, which I added as a luminance layer (after trying a few other techniques without success), and this is the result. Now I'm fully aware that what you can see above is predominantly luminance, with a bit of RGB thrown in to provide character, so Dave very much deserves most of the credit for this image. However, as he's not on Flickr, I'm happy to accept it :)
This is also my first attempt at combining Ha with RGB (albeit as luminance), and It makes my previous version look a bit sick :)
RGB:
SW ED80/EQ5
Nikon D70 modded, Baader Neodymium filter
45 x 180secs iso 800, 60 x 180secs iso 640 (5 hours 15 minutes)
Guiding (RA only): Quickcam Pro4000/9x50 finderscope, PHD
Stacked in DSS and processed in CS5
Ha:
15 x 600secs (2 hours 30 minutes)
Used Hasselblad 250mm f4 lens at f4 (cropped - quite a bit!)
Moravian G2 8300
Astrodon 5nm Ha filter
Takahashi EM200 mount
Guiding: DMK through an old 100mm M42 lens
M109 (NGC 3992) est une galaxie spirale barrée située dans la constellation de la Grande Ourse à environ 48 millions d'années-lumière.
On distingue également trois de ses galaxies satellites, plus petites : UGC 6923, UGC 6940 et UGC 6969.
Le rayon lumineux à droite de la galaxie est issu de l'étoile Gamma de la grande ourse, très brillante et très proche.
Newton SkyWatcher 200/1000
Monture EQ6-r pro
Canon 1000D défiltré partiel
Correcteur de coma Baader MPCC Mk III
Autoguidage OAG + ZWO ASI 290mm mini
ZWO EAF
ASIAIR Pro
Traitement PixInsight + Photoshop CC
Prise le 03/02/2021 :
57*300" => 4h45'
ISO 800
DOF
Three clear nights on the bounce - whatever next?! :)
Took advantage of the weather to give this a really good crack, something I've been waiting to do since the arrival of the ED80. This is full frame, so the focal length is ideal. As near as dammit 8 hours total exposure, made up of various sub lengths and iso settings. The variation in iso seems to improve the overall noise in the final tif, so I was able to stretch this a little further (some would say too far!). Not sure if it's a little too contrasty - all a matter of personal taste I suppose. Overall, I'm very pleased with this :)
SW ED80/EQ5, cropped
Nikon D70 modded, Baader Neodymium filter
18 x 4 mins iso 1600
30 x 6 mins iso 1250
22 x 10 mins iso 800
Guiding: Quickcam Pro4000/9x50 finderscope, PHD
Stacked in DSS and processed in CS5
NGC 7635, ou nébuleuse de la Bulle, est une nébuleuse d'environ 10 années-lumière de diamètre située dans la constellation de Cassiopée.
Elle est formée par le vent stellaire créé par l'étoile SAO 20575 à une vitesse de plus de 1 700 km/s.
A gauche l'amas ouvert Messier 52
Newton SkyWatcher 200/1000
Monture EQ6-r pro
Canon 1000D défiltré partiel
Correcteur de coma Baader MPCC Mk III
Filtre Ha EOS Clip Astronmik 12 nm
Autoguidage OAG + ZWO ASI 290mm mini
ZWO EAF
ASIAIR Pro
Traitement Pixinsight + Photoshop CC
Prise le 28/11/2020, lune 96% :
110*300" => 9h10'
ISO 800
M93 (NGC 2447) is an open cluster in Puppis. It's one of the more southerly Messier objects, so there's a shorter window for when I can shoot it from my location in Long Beach. These were taken on 2023-02-15 -- a rare clear night this winter.
I used a Celestron Edge HD 925 with Hyperstar at focal length 535 mm and an Atik 414-EX monochrome camera with Optolong CCD LRGB filters to get the following exposures:
L: 181 10 s exposures
R: 41 30 s exposures
G: 50 30 s exposures
B: 81 30 s exposures
Images were preprocessed in Nebulosity, then stacks were created in PixInsight. Channel combination and initial processing were in PixInsight, with final touches in Photoshop.
Taken with a TMB92L, Canon T3i DSLR, Orion SSAG autoguider and 50mm guidescope, and Celestron AVX mount. Consists of 32 180-second light frames and 28 180-second dark frames, all at ISO 400, as well as 31 flat and 25 bias frames. Captured with BackyardEOS, stacked in DeepSkyStacker, and processed in Photoshop. Diffraction spikes added with StarSpikes Pro.
Another Messier object to check off the list, and the only one in Capricornus. The star to the left (east) is 41 Cap. If you look closely, you will see some tiny (very distant) galaxies that share the view with this globular cluster.
This image is a stack of 23 guided 90s exposures made with a Celestron Edge HD 925 at f/2.3 with HyperStar and an Atik 314L+ color CCD. Preprocessing in Nebulosity; stacking and initial processing in PixInsight; final touches in PS CS 5.1.
The image center (J2000) is at
RA 21h 40m 50s
DEC -23° 12' 6"
Région entourant l'étoile Alnitak dans la ceinture d'Orion :
- La Nébuleuse de la tête de Cheval (Barnard 33), une nébuleuse obscure contrastant sur la nébuleuse émissive IC 434 en arrière plan
- NGC 2023 nébuleuse par réflexion en dessous de la tête de cheval
- La Nébuleuse de la flamme (NGC 2024) dans le coin inférieur gauche
Photo prise le 02/12/19
Newton SW 200/1000 sur N-EQ5
Canon 1000D défiltré partiel
Correcteur Baader MPCC MkIII
ISO 1600
262x30" => 2h11'
DOF 120-50-15
Traitement Siril + PS
Very early this morning, I had an epiphany, and made a big discovery.
As most of you know, I own a 10" Meade LX200 telescope. The focal ratio of the telescope is f/6.3, which puts it about 15-20 percent optically faster than a standard f/10 Schmidt-Cassegrain.
For a couple years, I've had an f/6.3 focal reducer/field flattener for a smaller f/10 8-inch Meade LX5 telescope I also own.
I decided to experiment - and in the process of doing so, I made my 10" LX200 optically faster by 50%. What does this mean?
I now have significantly more light gathering power, at a small cost. The focal length is halved from 1600mm to 800mm.
Not only that, I can shorten my exposure time by half!
This is the first result: Messier 42 - AKA The Great Orion Nebula.
10x5 seconds for the core
20x30 seconds for the outer fringes.
15x5-second dark calibration frames
30x30 second dark calibration frames
10 "T-shirt" flat calibration frames
It would've taken me about twice as long to gather the data to produce this image!
Triplet de galaxies spirales dans la constellation du lion, situées à 35 millions d'années lumière.
A gauche NGC 3628, et à droite M65 (NGC 3623) en haut et M66 (NGC 3627) en bas
Prise le 20/05/2020
200/1000 EQ6-r pro
Autoguidage OAG + T7m (ASI 120mm)
Canon 1000D défiltré partiel
49*180" => 2h27'
ISO 800
DOF 50-100-20
Traitement Siril + Pixinsight
Just before the Event Horizon Telescope started its imaging run on the supermassive black hole at the center of M87, I was imaging the same region of the sky with my Celestron Edge HD 925. The galaxy in question, M87, is in the lower left corner of this image. It is the closest Brightest Cluster Galaxy (BCG) to us, and it shows a relativistic jet when you take enough data to capture that feature.
The other galaxies that cross the top part of this picture are known as Markarian's Chain -- all of the prominent galaxies in this picture are part of the Virgo Cluster. M87 and the rest of the Virgo Cluster galaxies are about 55 million light years away. At that distance, if there was a civilization looking back at Earth, the image they would currently get is of a planet whose biosphere had just rebounded from the Chicxulub impact. However, any such image is exceedingly unlikely. On the full size scale of this image (1684x2408 pixels), the supermassive black hole would be 16 millionths of a pixel in size. That black hole is roughly 3 million times the diameter of the Earth. Using a radio telescope the size of the Earth, we were just able to resolve the black hole.
This image is a mosaic of 4 separate tiles. Each of those is a stack of 4 minute exposures. Images were shot with an Edge HD 925 at f/2.3 with Hyperstar and an Atik 314L+ color CCD. Preprocessing was done in Nebulosity. The stacking, initial processing, and mosaic composition was done in PixInsight. Final processing was done in PixInsight and PS CS 5.1.
The image center (J2000) is at:
RA 12h 29m 9s
DEC +13° 0' 17"
The image spans 1° 10' by 1° 40'.
There are 14 galaxies with NGC designations, and about 100 galaxies in total visible in the picture.
🔭💫 NGC 281
Pacman Nebula in H-Alpha + OIII
Località: Verona, Italia
Data: 02.10.2021 + 31.10.2022
Exposure: 3 hr, 09 min (81x60 H-Alpha + 108x60 OIII)
ZWO ASI1600MM Pro
Newton Skywatcher 150/750 PDS Explorer
EQ - Celestron AVX Advanced VX
Filter H-Alpha + OIII
DSS + Photoshop
Here is another deep-sky object from the meet-up on Saturday night (2nd April, 2016). This colourful gem is the Eta Carinae Nebula, for which we southern hemisphere folk are in prime viewing position. At the centre of the nebula is the “hypergiant” star Eta Carinae, which is estimated to be between 100 to 150 times the mass of the sun and about FOUR MILLION TIMES THE BRIGHTNESS LOF THE SUN! The nebula itself is about four times as large as the Orion Nebula, which I posted a photo of two nights back, but it’s not as well known because it’s not visible to most of the northern hemisphere.
This photo was created from a stack of five original images. Stacking reduces the digital noise in the final image.
Canon EOS 6D, Canon EF 100-400mm @ 400mm @ f/5.6, 30 sec @ ISO 3200.
Same ol' same ol' :)
I uploaded a version of this a month or so back that was supposed to be a combination of this year's data and last year's. Turned out it wasn't - what I got out of DSS was exactly last years data - it completely ignored this year's. DSS playing silly buggers.
This, on the other hand, is the combined data - 2 hours 23 minutes of 60 second subs. This is about three quarter frame, and rotated to provide a different angle - change is as good as a rest. Nice and small and cute :)
SW 200p, EQ5 unguided
Nikon D70 modded, iso1600, Baader MPCC and Neodymiun filter
142 x 60sec
darks, bias and flats.
Stacked in DSS and processed in CS5
Autosave3
The Crux constellation and the Coalsack Nebula (C99) captured with an old DSLR.
My Nikon D5000 have a serious issue with its sensor. On the right corner and top of the image we can see it failure. A region of the sensor which does have a lack of sensitivity.
First I though it was a "flat frame issue", but it's not. Darks and bias doesn't help.
Only after a carefully processing I'm "ok" in posting this picture. But my Nikon D5000 is old, and I'm not happy to say that it needs to retire.
I found an empty piece of plastic the other day, on which I had no hesitation in slapping a modded Canon 500D, purchased at a very reasonable price from James Stannard here. There then followed a bit of a learning curve - having been used to a Nikon - which has taken up the best part of two weeks. But I got there in the end :)
This is another collaboration with my good friend Dave Williams from the northern wastelands, who generously donated large portions of Ha, used as luminance.
I will now spend some time trying to breathe life into my Nikon D70 so that I can inflict some considerable pain on the thing, before I eventually kill it - slowly.... :)
RGB:
SW ED80/EQ5
Canon 500D modded, Baader Neodymium filter
90 x 180 sec subs, iso 1600, total 4 hours 30 minutes
Acquisition: APT
Guiding: Quickcam Pro4000/9x50 finderscope, PHD
Stacked in DSS and processed in CS5.
Ha (Dave Williams):
Takahashi FS78 with reducer
G2 8300 camera
10 x 10 minute subs for 1 hour 40 minutes
Last night I added some time to a session I did in February for a total of just over four hours of 3 minute subs. Struggled to beat the first version I did of this 2 years ago, and that was only 28 minutes for heavens sake! Got there in the end though :)
That star was gagging for some spikes :)
SW ED80/EQ5
Nikon D70 modded, Baader Neodymium filter
84 x 180sec subs, iso 800, for a total of 4 hours 10 minutes
Guiding (RA only): Quickcam Pro4000/9x50 finderscope, PHD
Stacked in DSS and processed in CS5. Spikes by StarSpikes Pro
The complete mosaic with this globular cluster and its surroundings can be viewed at flic.kr/p/2m84gRJ
Globular cluster M4 is the closest globular cluster to the Earth. It is situated in a very colorful part of the sky known as the Rho Ophiuchi dust complex. You can get a hint of the colors in the background of this image. This is part of the larger mosaic I am working on constructing around Antares. This is proving to be a good bit more challenging than the one near Sadr ( flic.kr/p/tYxubt ), mostly due to so many bright stars in the region. The gradients from the colors of interstellar dust and gas is also a challenge to work with.
The panels of the mosaic are stacks of 90 s shots. This portion includes 3 panels. There are 4 in the i Sco mosaic posted earlier (available at flic.kr/p/2gbsUqJ ). The 90 s shots were taken with a guided Celestron Edge HD 925 at f/2.3 with HyperStar and an Atik 314L+ one shot color camera. Preprocessing in Nebulosity with flats, darks, and bias frames; stacking, compiling the mosaic, and initial processing in PixInsight; final touches in PS CS 5.1.
Image center (J2000) is at
RA 16h 22m 57s
DEC -26° 23' 1"
The image spans about 1.5° x 1.0°.
I was browsing through some old captures, and then find this one. Why did I forget to publish it?
I don't know! Well, better later than never.
This was my first capture using my T6i, back on July 9, 2020.
I remember now, why I did capture the Crux again. My hope was to compare, side by side, my old Nikon D5000 and the "new" Canon T6i. Well, my D5000 served me well for a long time, but now it needs to retire. :)
The old picture: www.astrobin.com/sr6a6v/B/?nc=user
No darks, flats or bias
142x30s, ISO 1600
Nikon 135mm AI f2.8(f4) with Canon EOS Adapter
2019. 04. 27.
Mount: HEQ-5 Goto
OTA: Skywatcher 200/800
Skywatcher F4 CC
Canon EOS 6D (modfied)
Expo: 42X210s light, 20 dark, 20 flat, 20 flatdark, ISO 1600
Processed with: Nebulosity, Startools, Photoshop
Cloudy nights begs for revisits of old data ...
18x180s SII
14x180s Hα
4x180s OIII
100xBias
50xFlats per channel
50xDark Flats per channel
100xDarks
Processed in Pixinsight
Clustermania :)
A three hour gap in the endless, persistent cloud cover gave me just enough time to do another one of these things. Nebulous stuff takes several sessions under my light polluted skies, and would take months with the weather being as it is, so clusters beckon.
This is M38, aka NGC 1912, aka The Starfish Cluster (don't ask me why), and to the right is NGC 1907. M38 is about 4,200 light years away and is about 25 light years in diameter, similar to that of its more distant neighbour M37. It is about 220 million years old. NGC 1907 is around 4,500 light years from Earth. It contains around 30 stars according to Wiki (looks like more to me) and is over 500 million years old.
This is a closer crop than my previous two cluster efforts, for two reasons: first, the framing was rubbish, and second, the stars at the edges reminded me just how much I need a field flattener!
I'm running out of double clusters to do :)
SW ED80/EQ5
Canon 500D modded, Baader Neodymium filter
56 x 180 sec subs, iso 1600
Acquisition: APT
Guiding: Quickcam Pro4000/9x50 finderscope, PHD/EQMOD/AstroEQ
Stacked in DSS and processed in CS5.
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獵戶座褔祿壽三星一帶 Orion Belt Wide Field
近日天氣仍然時好時壞，數日前趁著好天氣匆匆的走到深空拍攝勝地試一下新鏡頭。現時初昇的獵戶仍然在較低位置，加上天氣的不濟，最後只能拍到8幅共32分鐘總曝光，訊噪比十分低。但總算為新鏡頭開光， 當作試鏡大家就先忍耐著看一下吧 :)
Photo by Michael Leung
日期：2015/09/13 @ 北潭涌
相機：CentralDS 600D @ -4c
鏡頭：Samyang 135 /2 @ f2.8
追星儀：iOptron ZEQ25
導星：Guided QHY5LII Mono
其他：IDAS LPS-D1 Filter
設定：ISO 1600, 240sec x 8 (Darkframe / Bias)
香港拍攝難度：★ (五星最高)
建議鏡頭焦距：100 ~ 300mm
適合拍攝月份：10月 ~ 3月 (香港)
大概方向：東昇西落
English below:
Il Velo del Cigno è un resto di supernova che ha un'estensione angolare di circa 3 gradi e, secondo le osservazioni più precise, la distanza da noi è di circa 1470 anni luce. E' catalogato come Sh2-103 (W78 come sorgente radio) ma le sue parti hanno identificazione del più utilizzato catalogo NGC, la parte orientale è NGC 6992 e 6995, mentre la parte più occidentale è NGC6960.
Per riprenderlo quasi nella sua interezza, ho esguito un mosaico di 2x2, ogni pannello ha circa 5 ore e mezza di integrazione con pose guidate da 10 minuti con filtro dualband Antlia ALP-T 5nm per la nebulosa mentre per le stelle sono un'ora di pose da 60 secondi senza filtri. Telescopio newton 150/600 con correttore Tecnosky 0.95x, camera Tecnosky Vision 571C, montatura Eq6-R Pro, elaborazione in Pixinsight.
The Cygnus Loop is a supernova remnant with an angular extension of about 3 degrees and, according to the most precise observations, its distance from us is about 1,470 light-years. It is cataloged as Sh2-103 (W78 as a radio source), but its parts are identified in the most widely used NGC catalog: the eastern part is NGC 6992 and 6995, while the westernmost part is NGC 6960.
To capture it almost in its entirety, I created a 2x2 mosaic. Each panel took about 5.5 hours of integration, with 10-minute guided exposures using an Antlia ALP-T 5nm dual-band filter for the nebula, and one hour of 60-second exposures without filters for the stars. 150/600 Newtonian telescope with Tecnosky 0.95x corrector, Tecnosky Vision 571C camera, Eq6-R Pro mount, Pixinsight processing.
M78 (ou NGC 2068) est une nébuleuse par réflexion située dans Orion. C’est la nébuleuse diffuse la plus brillante d'un groupe de nébuleuses qui comprend NGC 2064 et NGC 2067.
Matériel :
Newton SkyWatcher 200/1000
Monture EQ6-r pro
Canon 1000D défiltré partiel
Correcteur de coma Baader MPCC Mk III
Autoguidage OAG + ZWO ASI 290mm mini
ZWO EAF
ASIAIR Pro
Traitement Pixinsight + Photoshop CC
Session 1 le 18/12/2020 :
50*300" => 4h10'
ISO 800
Session 2 le 09/01/2021
54*300" => 4h30'
ISO 800
TOTAL 8h40'
Well heavens above - two clear nights on the bounce. I'd forgotten how to do this stuff ;)
My first guided image! :) The Crescent Nebula in Cygnus, a mere 5K light years away.
Bought a modded Quickcam Pro4000, with the adaptor to fit it to the SW 9x50 finder scope, from Badgers/Anton on SGL. Then did the EQ5 handset mod using the kit from Shoestring Astronomy, downloaded PHD and voila. Total cost £90 - can't be bad :) Not perfect of course, but then it was never going to be with an EQ5 and rubbish motors. There was some evidence of wispy bits around this, but it looked more like discolouration, so I took it out - probably expecting too much :)
SW 200p/EQ5
Nikon D70 modded, iso 1600, Baader CC and Neodymium filter
40 x 5 mins for a total of 3 hours 20 minutes
Guiding: Quickcam Pro4000/9x50 finderscope, PHD
Stacked in DSS and processed in CS5
We had several clear nights on the bounce a week or two back, and I spent the time imaging this thing as Cygnus was still getting up above my house a little late. This is just short of 10 hours, but I put it away because I got the feeling it was out of focus when comparing it with the version I did back in 2011 with the 200p. The stars in the cluster don't look quite as tight as I think they should.
Whaddya reckon? Out of focus?
Another clear sky, albeit with half a moon :)
Continuing my obsession with all things cluster, this is M67 in Cancer. Apparently there are few Galactic clusters known to be older (this is something like 4 billion years old), and none of them are as close as M67, so it is the subject of much study (according to Wiki). Slight variation in the spikes on this one, just to ring the changes :) A little noisy, but I had some trouble retaining the colour so decided to put up with it.
SW ED80/EQ5
Canon 500D modded, Baader Neodymium filter
60 x 180 sec subs, iso 800
Acquisition: APT
Guiding: Quickcam Pro4000/9x50 finderscope, PHD/EQMOD/AstroEQ
Stacked in DSS and processed in CS5.
"Stairway to Heaven"A few nights ago I was out gazing the milky way in the early pre-dawn sky. Twas a windy night at Dinosaur Point and i was tired and feeling less-than creative finding myself having difficulty composing. Watching the milky way in transit, i noticed the center hovering over the hills along the horizon reaching straight upward into the infinite sky. it appeared to be a cosmic stairway to heaven. Click and Voila! This shot really came to life in post, after delicate processing, the colors and details of the milky way make the pre-dawn sky bloom with color. Enjoy and thanks for stopping by:-)
Taken with a TMB92L, Canon T3i DSLR, Orion SSAG autoguider and 50mm guidescope, and Celestron AVX mount. Consists of 42 120-second light frames and 45 120-second dark frames, all at ISO 800, as well as 32 flat and 50 bias frames. Captured with BackyardEOS, stacked in DeepSkyStacker, and processed in Photoshop.