View allAll Photos Tagged ANDROMEDA
I was just fooling around with a simple new layer mode called "Average". It takes two layers, adds 'em together, divides by two and that's the result. The math is done in 16-bits, so there's no loss per channel. You can stack a warp layer with arbitrary rotation in it in between the two, and of course you can shift the layers x:y as well, all of which means you can line up the images perfectly if they were taken from the same position.
This is actually a composite of a 4-second exposure and a 6-second exposure, plus levels to push the grunge down even further. It cuts the random noise down by about half, which isn't bad for about ten minutes work with the compiler and a new, general purpose layer mode. ;-)
More technically: The idea - which is obvious, I admit - is that if there is a random noise speckle at position x:y, then because it is random, it won't be there in the next frame. So let's say it has a value of 5 in one frame and zero in the next. well, 5+0 is 5, and 5/2 is 2.5 which truncates (conveniently) so you actually end up with 2. Viola - noise is cut in half. Now, where there is a legitimate brightness of say, 50, it is 50 in both images, and 50+50 is 100, 100/2 = 50, and you get what you expect, unchanged. But let's say that there was the same degree of noise on one of those 50's. So one is 50, the other 55. 50+55 is 105, 105/2 is 52.5, truncates to 52... again, noise is 1/2 of what it would have been and result is closer to the 50 it should have been. What if the noise is a step down? ok, numbers are then 45 and 50. 45+50 is 95, 95/2 is 47.5, truncates to 47, result is 47 instead of 45, still better and still converging towards 50, where it belongs. But since the most objectionable noise is noise raised above the black level, truncation is the best choice so as to force the lowest level noise down towards channel zero level. Plus - because of how camera sensors work... there's more noise of various kinds towards zero than anywhere else. So it's good to step on the low-level stuff.
What I really need to do is write a specific program for the Mac to do this. If I feed it more than two images, I could use statistical methods to throw out noisy samples, or just create large input averages (10 images summed over 10) that would reduce any one noise input to 10% of its original value, or by whatever proportional number of images you fed it. All that requires is wrapping my head around XCode 3's new paradigm for object-oriented annoyance. Sigh. Not today.
Both shots were taken with my Canon EOS 40D, various settings.
The Andromeda Galaxy (M31) along with satellite galaxy's M32 and M110.
This is the first time I have used my 70-200mm F4.0 IS for astrophotography. Very clear night with very good seeing and transparency, but unfortunately was interrupted mid session by clouds. I was only able to get about thirty 30s exposures off before this part of the sky was heavily clouded over.
I was only able to use 24 exposures for a total exposure of 12 min thus the high noise and lack of detail. Hopefully the next time I'm out goes better.
Image was taken with:
Canon Digital Rebel XTi
70-200mm F4.0 IS @ 200mm F4.0 ISO 800
24 sub exposures of 30 seconds
Mounted on a Orion Skyview Pro Equatorial Mount
Post processed with:
Deepsky stacker
Photoshop CS3
Image was taken from the edge of Calgary in the suburbs.
21 x 8-minute ISO 1600 auto-guided exposures; astro-modified EOS 600D & Meade 127mm f/7.5 ED refractor telescope.
Frames stacked in Deep Sky Stacker software. Result post-processed to increase contrast, reduce noise, adjust overall colour balance and reduce colour gradients caused by light pollution. I also used Starnet++ to temporarily remove the stars during processing (as otherwise they dominate after stretching the contrast).
Taken with SeeStar s50 (250mm).
Approx. 170 stacked exposures (10sec each}
Stacked and Processed with Siril (also using StarNet and Graxpert). Final JPG processing with Photoshop Express.
My first attempt at photographing the Andromeda galaxy! It took me a long time to find and focus on it but this was the reward. I used a Star Adventurer Pro to track the sky. I took 28 lights and 10 darks. Photo was stacked in Deep Sky Stacker and edited in Photoshop and Lightroom. Let me know what you think!
Andromeda's Core acquired with
telescope Rc8 carbon
moravian G2-8300 mono
oag guide G0-0300
mount Az-Eq6
Software Pix and PS5 LRGB
Total exposure time including the previous
frames 15.6 hours
Flat , dark and bias
Messier 31 the Andromeda galaxy HaLRGB
I added some more data to this so it’s just under 13 hours of data, I think I’m done on this one
Equipment used;
CGX mount
QHY9s CCD
AA 70 EDQ-R telescope
Baader filters
Capture details;
24 x 300 red
21 x 300 green
26 x 300 blue
48 x 300 ha
36 x 300 lum
31 x darks
100 bias (super bias pixinsight)
Software used;
SGP, phd2, pixinsight & Photoshop
As a follow on to my last post, here is a dedicated image to the Andromeda galaxy. This is a collaborative effort between myself and my good friend Steve Zigler. Steve captured the data using his dedicated astro camera and telescope and then was kind enough to let me edit it (though he's perfectly capable of edited it himself!). This is a two image pano, shot in LRGB. As my first LRGB image, let me just say this was an absolute BEAST to put together. Fun project, and a nice companion image to my last post.
Camera: Nikon D750
Lens: Nikon 500mm f5.6 PF
SkyGuider Pro tracker
Exposure time: 60 x 40 seconds = 40 min total integration
Focal length: 500mm
Aperture: 5.6
Stacked and combined in DeepSkyStacker
DATOS DE CAPTURA
TELESCOPIO: TS DOBLETE APO FPL 53 60/290
MONTURA HEQ5 SW
CAMARA :ASI 183 MM PRO
FILTROS: OPTOLONG LRGB 1.25
RUEDA DE FILTROS MINI 1.25
OAG: ZWO
CAMARA DE GUIADO QHY5/II MC
MINI PC
100 LIGHT 120sg LUM BIN 1X1 TEMP -10
25 LIGHT 150sg RGB BIN 1X1 TEMP -10
25 TOMAS CALIBRACION DARK, FLATS, DARKFLATS
Pieris Japonica. A broad-leafed evergreen shrub, native to eastern China, Taiwan, and Japan, that blossoms in the spring with long strands (racemes) of bell-shaped flowers that are sometimes mistaken for lily of the valley. From my mother's garden. One photo a day.(84/366) -- March 24, 2020
Telescope: Vixen R130S Newton (720mm focal length)
Camera: Fuji XT-2 at prime focus
11 lights, 120 sec. , ISO 3200
11 lights, 120 sec. , ISO 6400
No darks.
Images stacked with Nebulosity and postprocessed with Photoshop.
The Andromeda Galaxy is a spiral galaxy approximately 2.5 million light-years away from Earth.
Also visible are the two satellite galaxies M32 and M110 (right below).
The number of stars contained in the Andromeda Galaxy is estimated at one trillion, or roughly twice the number estimated for the Milky Way.
Andromeda is the nearest major galaxy to the Milky Way. It has a diameter of about 220,000 ly, making it the largest member of the Local Group.
The Milky Way and Andromeda galaxies are expected to collide in around 4.5 billion years, merging to form a giant elliptical galaxy.
About 40 2 minute subs at ISO 1600.
200mm L lens at f3.5, Astrotrac and Canon 20D
Could probably do with a bit of star reduction, but hey-ho!
First light with my TS 65 Quad scope. Just an experiment with very little data - will be adding to this if we ever get another clear night!
Deep Dream Generator Using Base Image "Interstellar" my own Creation www.flickr.com/photos/129036396@N07/21280433503/in/datepo... Eyes Reworked in Photoshop
Taken with the good old omd e-m5
330 Lightframes each 25 sec. - 210mm + 1,7 teleconverter
iso4000 - f4
+
30 Darks
30 Flats
Tracking with Vixen Polarie and aligned with the Polar Finder telescope, mounted on a self-made bracket with counterweight. Edited in Deep Sky Stacker and Lightroom.
The result is slightly better than the last time I tried to photograph M31. At that time, many pictures were unusable because they became blurred in the course of the evening. So this time I secured the focusing ring of the lens with a piece of paper and a rubber band.
Probably one of the most famous views of Yosemite Valley, this is taken from Tunnel View. Unfortunately the light polution from the tunnel lights behind me proved problematic. Although this image has the less attractive side of the Milky Way it was nice to capture the Andromeda Galaxy peaking over El Capitan. Also of note is the green airglow just visible over Half Dome in the distance which is caused by radiation in the upper atmosphere.
As ever thanks for viewing. Nearly the weekend. :0)
The Andromeda Galaxy with satellite galaxies M32 (centre right below) and M110 (centre above)
The Andromeda Galaxy (IPA: /ænˈdrɒmɪdə/), also known as Messier 31, M31, or NGC 224 and originally the Andromeda Nebula, is a barred spiral galaxy with diameter of about 46.56 kiloparsecs (152,000 light-years)[8] approximately 2.5 million light-years (765 kiloparsecs) from Earth and the nearest large galaxy to the Milky Way. The galaxy's name stems from the area of Earth's sky in which it appears, the constellation of Andromeda, which itself is named after the princess who was the wife of Perseus in Greek mythology. (Wikipedia)
Mount: Sky Watcher “Star Adventure 2i”
Guiding: N/A
Filter: N/A
Camera: Canon EOS R7 (None modified)
Canon EF 70-200mm L USM f2.8 IS
Focal length: 200mm
125 frames - ISO 640 - f3.2 - 60 second
Darks: 15
Flats: 15
DarkFlats: N/A
Bios: 15
Bortle 5.5
Processing: AstroPixelProcessor > Photoshop >Topaz > Photoshop
L 13 x 200sec (1x1)
R 8 X 120sec (2x2)
G 8 X 120sec (2x2)
B 8 X 120sec (2x2)
Camera: QSI 583
Telescope: TS80APO with 0.8 reducer (effective 380mm)
Mount: iOptron iEQ30 Pro
M31 + 2 satellite galaxies M110 & M32.
Taken from rural Oxfordshire with a Helios 102mm refractor on an EQ5 tracking mount + Canon 1100D at prime focus.
Single shot, ISO-3200 60 seconds
Image processed in Lightroom
24X240 secondi e 24X180 secondi + 15 sub frame di 15 secondi per desaturare il nucleo a iso 800 con Eos 5D Mk2 su FS60CB e TKA 20582B reducer 0,72X F 4,2 autoguidati con PHD guiding con Soligor 200 mm. e Orion Starshoot su AZEQ6 GT SW,per un totale di 2,5 ore,processing Pixinsight 1.8.8-6 ,elaborati infine con Photoshop CC15 e Topaz Labs plugin,temperatura esterna 27° c, temperatura sensore 10° c di media,cielo di Lucrezia
Old memories
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Esta es otra de las habitaciones de la casa de muñecas, en concreto será la de Erik, me hace falta rellenarla con cuadritos estilo viejuno, litografías, mapas..., una biblioteca y muuuchos libros ^^
Resultado de mi primera salida en solitario para hacer fotografías de cielo profundo con mi propio equipo. Se trata de M31 en el catálogo Messier o como muchos la conocemos Galaxia de Andrómeda.
Con mucho todavía por aprender, pero con muchísima ilusión viendo que con un equipo fotográfico modesto podemos conseguir imágenes de algo completamente invisible para nuestros ojos y verdaderamente espectacular.
Espero vuestra opinión sobre la imagen y sobre todo, a esa gente que más sabe de esto, le podéis dar la caña que creáis necesaria 😜
Second attempt at capturing this beautiful Galaxy.
Shot with Nikon D7500 and Sigma 100-400 (at 400mm) on Skywatcher Staradventurer mount.
11 pictures of 30s each stacked together with Deepskystacker.
Deuxième tentative de photographie de la Galaxie d'Andromède, notre voisine la plus proche. Sous un ciel bien sombre elle est visible à l'oeil nu. On aperçoit aussi ses deux galaxies satellite: M32 et M110.
Y a du progrès depuis ma première tentative mais j'essaierai de faire encore mieux à l'avenir :)
Yes, this is a real image taken from the planet Earth. It is known as the Andromeda Galaxy and is located about 2.5 million light years away.
Many people think that you must send a satellite and expensive equipment up to space in order to capture the true beauty of what's above. This is false.
I captured this image by taking many light, dark, flat, and bias frames. A computerized equatorial mount was also the key to this, as it allowed me to take pictures of the stars without them trailing out.
I know the image isn't that great because of the graininess and size of the subject, but I promise that there will be many more to come and they will look even better.
Nikon D7000, Nikon 80-200mm @ 200mm, f/5.6, ISO 2500, 30 sec
Lights: 27 x 30 sec, 5 x 75 sec
Darks: 27
Flats: 13
Biases: 27
Kuiskaava Kettu #SLblog post: Aisha, Alme, Atomic, Cerberus Xing, EVE, Fameshed, Meva, Midwinter, Pure Poison, Sanarae, She Avi, Song, Truth, Whispering Hearts, Zeus, etc. kuiskaavakettu.blogspot.fi/2017/01/andromeda.html