Showing posts with label Tokina 300mm f2.8 images. Show all posts
Showing posts with label Tokina 300mm f2.8 images. Show all posts
Sunday, March 14, 2021
Space between Cygnus and cepheus
I have published several large mosaic image panoramas in a past year. I have made several smaller sub-panoramas, they are working as an independent artworks.
This image shows an area between well known and much imaged objects, I always like to find a new viewpoints to the sky.
The space between Cygnus and Cepheus
Click for a large image, it's worth it
Image in mapped colors from the light emitted by an ionized elements, hydrogen = green, sulfur = red and oxygen = blue.
A closeup to show the resolution
Click for a large image,
Click for a large image,
A closeup from the main image shows the Sharpless 124 at up and the Cocoon nebula with a dark gas stream at bottom.
The mosaic, technical info
Panels used for the mosaic image are marked here, panels are shot between 2010 and 2021
I have used several optical configurations for this mosaic image during the years. Up to 2014 I was using an old Meade LX200 GPS 12" scope, QHY9 astrocam, Canon EF 200mm f1.8 camera optics and baader narrowband filter set. After 2014 I have had 10-micron 1000 equatorial mount, Apogee Alta U16 astro camera, Tokina AT-x 200mm f2.8 camera lens and the Astrodon 50mm square narrowband filter set. I have shot many details with a longer focal length, before 2014 by using Meade 12" scope with reducer and after 2014 Celestron EDGE 11" and reducer. Quider camera has been Lodestar and Lodestar II.
Thursday, March 4, 2021
Nebulae of Auriga and how my mosaic images are done.
I'll like to show the actual resolution of this and other of my large mosaic images by posting a close up from this panorama. Since there are data from so many years (2009 -2021) and it has been shot with various optical configurations, I had to develop a new method to combine frames for a mosaic image.
A closeup from the panorama
Click for a large image
Click for a large image
This closeup is reduced about 80% from the original resolution
In my last blog post I published a panoramic mosaic image showing the sky between taurus and Perseus. https://astroanarchy.blogspot.com/2021/02/a-new-mosaic-image-from-taurus-to.html
The Mosaic Work
Up to 2014 I was using an old Meade LX200 GPS 12" scope, QHY9 astrocam, Canon EF 200mm f1.8 camera optics and baader narrowband filter set. After 2014 I have had 10-micron 1000 equatorial mount, Apogee Alta U16 astro camera, Tokina AT-x 200mm f2.8 camera lens and the Astrodon 50mm square narrowband filter set. I have shot many details with a longer focal length, before 2014 by using Meade 12" scope with reducer and after 2014 Celestron EDGE 11" and reducer. Quider camera has been Lodestar and Lodestar II.
I took my current toolset as a base tool since it has a relatively high resolution combined to a very large field of view. Also it collects photons very quickly since it's undersampled and I can have very dim background nebulosity visible in very short time (many times 30 min frame is enough)
I do all my mosaic work under the PhotoShop, Matching the separate panels by using stars as an indicator is kind of straight forward work. My processing has become so constant, that very little tweaking is needed between separate frames, just some minor levels, curves and color balance.
I have used lots of longer focal length frames in my mosaic to boost details. To match them with shorter focal length shots I developed a new method.
Firstly I upscale the short focal length frames about 25% to have more room for high resolution images.Then I match the high res photo to a mosaic by using the stars as an indicator. After that I remove all the tiny stars from the high res image. Next I separate stars from low res photo and merge the starless high res data to a starless low res frame. And finally I place the removed low res stars back at top of everything with zero data lost. Usually there are some optical distortions and it's seen especially in a star field. Now all my stars are coming from a same optical setup and I don't have any problems with distortions. (I'm using the same star removal technique as in my Tone Mapping Work Flow)
Sunday, February 28, 2021
A new mosaic image from Taurus to Perseus 2009-2021
I have published several large mosaic images in past six months. This time my mosaic project took about 12 years to get finalized.
49 individual panels are covering 36 x 11 degrees of sky, total exposure time is around 250 hours. Native resolution for the mosaic is 31.000 x 8.800 pixels.
There are several rarely seen objects in my mosaic, they are very dim and majority of the 250 hours of exposures was used for them. There are three supernova remnants in the panorama, Simeis 147 at left, Sharpless 224 and Sharpless 221 are located at center of the image. They all are very dim but the Sharpless 221 is the most difficult one, it has an extremely low surface brightness and I think that my photo of Sh2-221 was the first three band color image out of it. Two large emission nebulae at right end of the mosaic must be the dimmest nebulae I have ever shot.
From Taurus to Perseus 2009-2021
Click for a large image, it's worth it!
Image in mapped colors from the light emitted by an ionized elements, hydrogen = green, sulfur = red and oxygen = blue. NOTE, the apparent size of the Moon in a lower left corner.
Frames used for the large mosaic
Click for a large image
Details and Orientation
Click for large images
Links to some of the individual images used in large panorama
Simeis 147
Sh2-221 & 216
https://astroanarchy.blogspot.com/2020/04/two-ways-to-go-in-same-field-of-view.html
older version
https://astroanarchy.blogspot.com/2014/01/sh2-221-supernova-remnant-in-auriga.html
older version
https://astroanarchy.blogspot.com/2014/01/sh2-221-supernova-remnant-in-auriga.html
Sharpless 205, NGC 1491 and Lynds Bright Nebula 696
Jus H-alpha
Thursday, February 18, 2021
Sharpless 132, sh2-132, with new data
I have shot a large four panel mosaic out of the Sharpless 132 emission Nebula at february 2019. At the time I was using the Celestron EDGE 11" telescope with reducer. Sh2-132 locates in the border of Cepheus and Lacerta at distance of about 10 000 ly.
I shot same object with a shorter focal length instrument, the Tokina AT-x 300mm f2.8 camera optics. Since the system is kind of undersampled, I got a very deep image of Sh2-132 just with four hours of exposures.
I have now combined those two images and the result has the best out of both worlds . All the high resolution details and the high signal to noise elements are from the long focal length photo and the dim background stuff is from short focal length photo. I have a new processing method to do this and it turned to be a very powerful for a work like this. I call it to VARES-method. Variable Resolution imaging. will be good tool when I want to go very deep very fast and have a high resolution details at the same time.
This is a way to combine best out of the correctly sampled and under sampled optical configurations!
I think this image is a good sample what VARES-technique can do.
Sharpless 132
Click for a large image
Sharpless 132 in mapped colors, from the emission of ionized elements,
R=Sulfur, G=Hydrogen and B=Oxygen. (Hubble Palette)
A version with out VARES method can be seen here, https://astroanarchy.blogspot.com/2019/02/sharpless-132-sh2-132.html
A version with out VARES method can be seen here, https://astroanarchy.blogspot.com/2019/02/sharpless-132-sh2-132.html
A closeup
Click for a large image
A wide field image of the Sharpless 132
Click for a large image
Sharpless 132 in mapped colors, from the emission of ionized elements,
R=Sulfur, G=Hydrogen and B=Oxygen. Image details can be seen here, https://astroanarchy.blogspot.com/2020/11/a-new-photo-of-sharpless-132-sh2-132.html
Technical details
Processing workflow
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 33 iterations, added at 50% weight
Color combine in PS CS3
Levels and curves in PS CS3.
Imaging optics
Tokina AT-x 300mm f2.8 camera lens
Celestron EDGE 11" telescope with reducer
Celestron EDGE 11" telescope with reducer
Mount
10-micron 1000
Cameras and filters
Imaging camera Apogee Alta U16 and Apogee seven slot filter wheel
Guider camera, Lodestar x 2 and an old spotting scope of Meade LX200
Astrodon filters,
5nm H-alpha 3nm S-II and 3nm O-III
5nm H-alpha 3nm S-II and 3nm O-III
Total exposure time used for VARES-processing
Tokina camera optics
Tokina camera optics
H-alpha, 6 x 1200 s, binned 1x1 = 2 h
O-III, 3 x 1200 s, binned 1x1 = 1 h
S-II, 3 x 1200 s, binned 2x2 = 1 h
Celestron telescope
O-III, 3 x 1200 s, binned 1x1 = 1 h
S-II, 3 x 1200 s, binned 2x2 = 1 h
Celestron telescope
Total exposure time for all of the four panels together
H-alpha, 48 x 1200 s, binned 2x2 = 16 h
O-III, 24 x 1200 s, binned 4x4 = 8 h.
S-II, 18 x 1200 s. binned 4x4 = 6 h
O-III, 24 x 1200 s, binned 4x4 = 8 h.
S-II, 18 x 1200 s. binned 4x4 = 6 h
Monday, February 8, 2021
Cygnus mosaic in visual colors
I have published this image in mapped colors at December 2020, it can be seen here, https://astroanarchy.blogspot.com/2020/12/cygnus-project-grande-finale-for-now.html
I have started this imaging project back at 2010. My aim was to make a high resolution mosaic covering the constellation Cygnus. Work like that takes time and patience, especially since I have worked so, that many of the individual sub mosaics or frames have been published as an individual artworks. Here is a poster format presentation about all of longer focal length images used for this mosaic beside wide field panels, https://astroanarchy.blogspot.com/2018/11/treasures-of-swan.html
As a result I have now a huge 37 panel (And 58 long focal length sub-panel) mosaic panorama covering 28 x 18 degrees of sky. I have collected photons way over 400 hours during past ten years for this photo. The full size mosaic image has a size of about 25.000 x 15.000 pixels.
A photo of five million stars*
Great Mosaic of Cygnus (2010-2020)
28x18 degrees, 97 panels and over 400 hours of exposure time
The full size photo is worth to see! (2700 x 1700 pixels)
An apparent size of the Moon is marked as a scale at bottom left of the picture frame.
This is a large area of sky! (28 x 18 degrees) Image is in visual colours, from the emission of ionized elements in the area.
* I actually counted the stars and in this field of view there are little over five million individual stars!
Orientation
Three supernova remnants, two Wolf Rayet stars and a black hole
Please, click the image for full resolution
Three supernova remnants, two Wolf Rayet stars and a black hole
Please, click the image for full resolution
In the orientation image above, there are three large supernova remnants visible, first the Cygnus Shell W63 , bluish ring at upper left quarter, secondly the large SNR G65.3+5.7 at utmost right and finally the third is a brighter SNR, the Veil nebula just outside of field of view at bottom center. (Image is partly overlapping with large mosaic but I didn't want to include it yet due to artistic composition.)
Beside three supernova remnants there are two Wolf Rayet stars with outer shell formations. NGC 6888, the Crescent Nebula at center of the image and the WR 134, it can be seen as a blue arch just right from the Crescent Nebula, near the Tulip nebula.
Next to the Tulip Nebula lays a Black hole Cygnus X-1, it's marked in small closeup image of the Tulip Neula at center right in orientation image above.
Constellation Cygnus is an endless source of celestial wonders, both scientifically and aesthetically. For me, as an visual artist, this are of night sky is very inspiring There are endless amount of amazing shapes and structures, I can spend rest of my life just shooting images from this treasury.
Beside three supernova remnants there are two Wolf Rayet stars with outer shell formations. NGC 6888, the Crescent Nebula at center of the image and the WR 134, it can be seen as a blue arch just right from the Crescent Nebula, near the Tulip nebula.
Next to the Tulip Nebula lays a Black hole Cygnus X-1, it's marked in small closeup image of the Tulip Neula at center right in orientation image above.
Constellation Cygnus is an endless source of celestial wonders, both scientifically and aesthetically. For me, as an visual artist, this are of night sky is very inspiring There are endless amount of amazing shapes and structures, I can spend rest of my life just shooting images from this treasury.
THE MOSAIC
Evolution of the mosaic between 2010 and 2020
Click for a large image
Mosaic panels in chronological order
Click for a large image
There are 37 base panels with shorter focal length tools (300mm f2.8 Tokina and 200mm f1.8 Canon) There is also 59 sub-panels used, they are shot with my old 12" Meade and 11" Celestron Edge scopes.
NOTE I recalculated the total exposure time and it's actually way over 600 hours.
Here is a poster format presentation and a list all of longer focal length images used for this mosaic beside the actual panels, https://astroanarchy.blogspot.com/2018/11/treasures-of-swan.html
I have used several optical configurations for this mosaic image during the years. Up to 2014 I was using an old Meade LX200 GPS 12" scope, QHY9 astrocam, Canon EF 200mm f1.8 camera optics and baader narrowband filter set. After 2014 I have had 10-micron 1000 equatorial mount, Apogee Alta U16 astro camera, Tokina AT-x 200mm f2.8 camera lens and the Astrodon 50mm square narrowband filter set. I have shot many details with a longer focal length, before 2014 by using Meade 12" scope with reducer and after 2014 Celestron EDGE 11" and reducer. Quider camera has been Lodestar and Lodestar II.
Here is a poster format presentation and a list all of longer focal length images used for this mosaic beside the actual panels, https://astroanarchy.blogspot.com/2018/11/treasures-of-swan.html
Equipments used
Couple of close ups to show the resolution
Click for a large image
North america & pelican nebula region
Supernova remnant G65.3+5.7
Cirrus of Western Cygnus
Monday, February 1, 2021
This gigapixel mosaic has about 1000 exposure hours between 2010 - 2021
Over a ten years and about 1000 hours of exposures, the image spans 82 x 20 degrees of sky at resolution of 17.000 x 72.000 pixels (Over a gigapixel)
Individual frames are shot between 2010 and 2021, there are total 168 images stitched together! There are more than ten million stars visible in this mosaic image!
From Perseus to Cygnus
Click for a large image (6000 x 1500 pixels)
Image in mapped colors from the light emitted by an ionized elements, hydrogen = green, sulfur = red and oxygen = blue. NOTE, the apparent size of the Moon in a lower left corner.
The Cassiopeia side of the mosaic, https://astroanarchy.blogspot.com/2021/01/mosaic-image-gets-large-400-hours-and.html
The Cygnus side of the mosaic, https://astroanarchy.blogspot.com/2020/12/cygnus-project-grande-finale-for-now.html
Orientation in the sky
Orientation in the sky
Click for a large image
Details
Click for a large image
Click for a large image
Evolution of the grande mosaic shot between 2010 and 2021
Click for a large image
Imaging info
Tools
The Central Cygnus
Original size in mosaic image is 5000 x 2500 pixels
The supernova remnant G65.3+5.7
The tulip nebula area
It took over a ten years to finalize this mosaic image. The reason for a long time period is naturally the size of the mosaic and the fact, that image is very deep. Another reason is that I have soht most of the mosaic frames as an individual compositions and publish them as independent artworks. That leads to a kind of complex image set witch is partly overlapping with a lots of unimaged areas between and around frames. I have shot the missing data now and then during the years and last year I was able to publish sub mosaic images as I got them ready first.
My processing workflow is very constant so very little tweaking was needed between the mosaic frames. Total exposure time is way over 900 hours. Some of the frames has more exposure time, than others. There are some extremely dim objects clearly visible in this composition, like a extremely dim supernova remnant W63, the Cygnus Shell. It lays about six degrees up from North America nebula and it can be seen as a pale blue ring. I spent about 100 hours for this SNR alone. An other large and faint supernova remnant in Cygnus can be seen at near right edge of the image. G65.5+5.7 is as large as more famous Veil nebula. There are over 60 exposure hours for this SNR alone. (Veil SNR is just outside of the mosaic area but can be seen in "Detail" image above.)
My processing workflow is very constant so very little tweaking was needed between the mosaic frames. Total exposure time is way over 900 hours. Some of the frames has more exposure time, than others. There are some extremely dim objects clearly visible in this composition, like a extremely dim supernova remnant W63, the Cygnus Shell. It lays about six degrees up from North America nebula and it can be seen as a pale blue ring. I spent about 100 hours for this SNR alone. An other large and faint supernova remnant in Cygnus can be seen at near right edge of the image. G65.5+5.7 is as large as more famous Veil nebula. There are over 60 exposure hours for this SNR alone. (Veil SNR is just outside of the mosaic area but can be seen in "Detail" image above.)
Frames used for the large mosaic
Click for a large image
I have used several optical configurations for this mosaic image during the years. Up to 2014 I was using an old Meade LX200 GPS 12" scope, QHY9 astrocam, Canon EF 200mm f1.8 camera optics and baader narrowband filter set. After 2014 I have had 10-micron 1000 equatorial mount, Apogee Alta U16 astro camera, Tokina AT-x 200mm f2.8 camera lens and the Astrodon 50mm square narrowband filter set. I have shot many details with a longer focal length, before 2014 by using Meade 12" scope with reducer and after 2014 Celestron EDGE 11" and reducer. Quider camera has been Lodestar and Lodestar II.
Details from the large mosaic to show the resolution
(Images are reduced for a web usage)
Click for a large image!
North America and the Pelican Nebula
NOTE, image is reduced to 2000 x 1300 pixels from 6000 x 4000 pixels.
The supernova remnant G65.3+5.7
More info about this image here, https://astroanarchy.blogspot.com/2020/11/g65357-large-supernova-remnant-in_22.html
A closeup from the supernova remnant G65.3+5.7
The noise is not a noise, just a massive amount of stars
A closeup from the supernova remnant G65.3+5.7
The noise is not a noise, just a massive amount of stars
The starfield in this part of Milky Way is extremely dense, blog post about this SNR can be seen here, https://astroanarchy.blogspot.com/2020/11/a-supernova-remnant-in-cygnus-g65357-snr.html
The whole Cassiopeia
The Tulip Nebula, Sh2-101, can be seen at center right, there is also a black hole Cygnus X-1
The blog post with technical details can be seen here, https://astroanarchy.blogspot.com/2020/10/the-tulip-nebula-in-cygnus-sh2-101.html
Cirrus of Cygnus and the supernova remnant W63
Blog post about this photo, https://astroanarchy.blogspot.com/2020/12/cirrus-of-cygnus-and-supernova-remnant.html
The blog post with technical details can be seen here, https://astroanarchy.blogspot.com/2020/10/the-tulip-nebula-in-cygnus-sh2-101.html
Cirrus of Cygnus and the supernova remnant W63
Sharpless 124
Sharpless 132
IC 1396
From Bubble to Cave Nebula
Thursday, January 21, 2021
Mosaic image gets large, 400 hours and 41 panels
Nine years and over 350 hours of exposures, 41 panels and 31 high resolution sub-panels stitched together seamlessly. This mosaic image spans about 45 x 18 degrees of sky, the original resolution is 14.000 x 41.000 pixels.
Previous version of this mosaic image can be seen here, https://astroanarchy.blogspot.com/2020/12/from-cassiopeia-to-cepheus-eight-years.html
From cassiopeia to Cepheus
Click for a full size image, it's really worth it! (3700 x 1400 pixels)
Image is in mapped colors from a light from the ionized elements, hydrogen = green, sulfur = red and oxygen = blue. NOTE, there is an image of the Moon at the same scale in lower left corner.
The heart and Soul nebulae are at upper left corner and the IC 1396 with the Elephant's Trunk Nebula at center right. There are many well known objects in this massive mosaic image including the Bubble and Cave Nebulae at just a little right from the center. There are about six million stars in this composition.
Orientation
Click for a full size image
Evolution of the mosaic image shot between 2012 - 2021
Click for a full size image
Click for a full size image
Equipments
Some reduced size details from the full size mosaic image
Sharpless 132
IC 1396
Supernova remnant CTB1
Sharpless 124
From Bubble to Cave Nebula
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