Showing posts with label Black and White images (Hydrogen-alpha). Show all posts
Showing posts with label Black and White images (Hydrogen-alpha). Show all posts
Wednesday, April 29, 2020
Grayscale Wonders part IV
Usually most of the details are in hydrogen alpha emission line. Gray scale images can be really beautiful and many times I personally like them best. I will publish now some of my images from this winter season as a grayscale compositions. This is a part IV of Grayscale Wonders, part one, two and three can be seen here: Part one, https://astroanarchy.blogspot.com/2020/04/greyscale-wonders.html
Part two, https://astroanarchy.blogspot.com/2020/04/grayscale-wonders-part-ii.html
Part three, https://astroanarchy.blogspot.com/2020/04/grayscale-wonders-part-iii.html
Please, open the full size photo by clicking the image, it's really worth it!
Cederblad 214, the Cosmic Question Mark
Photo in colors can be seen here, https://astroanarchy.blogspot.com/2020/02/new-photo-of-cederblad-214-cosmic.html
Sh2-216 & Sh2-221 Supernova remnant and a planetary nebula
Photo in colors can be seen here, https://astroanarchy.blogspot.com/2020/04/two-ways-to-go-in-same-field-of-view.html
From the Bubble to Cave Nebula
Photo in colors can be seen here, https://astroanarchy.blogspot.com/2020/03/deep-red-glow-of-hydrogen-from-bubble.html
Tuesday, April 21, 2020
Grayscale Wonders part III
Usually most of the details are in hydrogen alpha emission line. Gray scale images can be really beautiful and many times I personally like them best. I will publish now some of my images from this winter season as a grayscale compositions. This is a part III of Grayscale Wonders, part one and two can be seen here: Part one, https://astroanarchy.blogspot.com/2020/04/greyscale-wonders.html
Part two, https://astroanarchy.blogspot.com/2020/04/grayscale-wonders-part-ii.html
Please, open the full size photo by clicking the image, it's really worth it!
NGC 1491
Photo in colors can be seen here, https://astroanarchy.blogspot.com/2020/03/a-two-frame-mosaic-photo-of-sharpless.html
California Nebula, NGC 1499
Version in mapped colors can be seen here, https://astroanarchy.blogspot.com/2020/01/a-deep-view-to-california-nebula-in.html
Supernova remnant Simeis 147
Version in mapped colors, https://astroanarchy.blogspot.com/2020/02/simeis-147-sh2-240-large-supernova.html
Version in visual colors, https://astroanarchy.blogspot.com/2020/03/simeis-147-sh2-240-with-more-light-from.html
California Nebula, NGC 1499
Supernova remnant Simeis 147
Version in visual colors, https://astroanarchy.blogspot.com/2020/03/simeis-147-sh2-240-with-more-light-from.html
Tuesday, April 7, 2020
Grayscale Wonders part II
All the photos, I have published, are taken with a grayscale astronomical camera. Each color channel is shot separately and then combined to RGB color image. Since I'm doing only narrowband imaging due the extensive light pollution color channels are are emission line images. Most of the time I'm capturing three emission lines hydrogen, sulfur and oxygen. (H-alpha, S-II and O-III)
Usually most of the details are in hydrogen alpha emission line. Gray scale images can be really beautiful and many times I personally like them best. I will publish now some of my images from this winter season as a grayscale compositions. This is a part II of Grayscale Wonders, part one can be seen here, https://astroanarchy.blogspot.com/2020/04/greyscale-wonders.html
Please, open the full size photo by clicking the image, it's really worth it!
A two frame mosaic photo of Sharpless 205, NGC 1491 and Lynds Bright Nebula 696
Image details and a mapped color version can be found here,
https://astroanarchy.blogspot.com/2020/03/a-two-frame-mosaic-photo-of-sharpless.html
nebula in visual colors can be seen here,
https://astroanarchy.blogspot.com/2020/03/sharpless-205-ngc-1491-and-lynds-bright.html
Great Mosaic of Cepheus
Image details and a mapped color version can be found here,
https://astroanarchy.blogspot.com/2020/03/great-mosaic-of-cepheus.html
Great Mosaic of Auriga
Image details and a mapped color version can be found here,
https://astroanarchy.blogspot.com/2020/03/the-grande-mosaic-of-auriga.html
https://astroanarchy.blogspot.com/2020/03/a-two-frame-mosaic-photo-of-sharpless.html
nebula in visual colors can be seen here,
https://astroanarchy.blogspot.com/2020/03/sharpless-205-ngc-1491-and-lynds-bright.html
Great Mosaic of Cepheus
https://astroanarchy.blogspot.com/2020/03/great-mosaic-of-cepheus.html
Great Mosaic of Auriga
https://astroanarchy.blogspot.com/2020/03/the-grande-mosaic-of-auriga.html
Thursday, February 9, 2017
B&W universe, part IV
As I'm using a cooled Gray scale astronomical CCD camera, I have a Black and White images from all of my photos. (For a color image, colors are made by shooting each color channel trough a filter, in my case mostly a narrow band filters.)
Nebulae of the Central Cygnus, a mosaic image project
Please, click for a large image
Eleven panels ( 2200 x 1000 pixels)
Five panels ( 2200 x 1000 pixels)
One panel
For technical details and a color versions, please, use a link under the images above.
Wednesday, February 8, 2017
B&W universe, part III
As I'm using a cooled Gray scale astronomical CCD camera, I have a Black and White images from all of my photos. (For a color image, colors are made by shooting each color channel trough a filter, in my case mostly a narrow band filters.)
I will publish few posts out of my B&W images. Sometimes I like them better as a color ones.
B&W universe part I can be found HERE and Part II from HERE
B&W universe part I can be found HERE and Part II from HERE
Dark filaments of the Pelican nebula
Please, click for a large image
A two panel mosaic
Please, click for a large image
For technical details and a color versions, please, use a link under the images above.
Thursday, January 19, 2017
B&W universe, part I
As I'm using a cooled Gray scale astronomical CCD camera, I have a Black and White images from all of my photos. (For a color image, colors are made by shooting each color channel trough a filter, in my case mostly a narrow band filters.)
I will publish few posts out of my B&W images. Sometimes I like them better as a color ones.
North America Nebula, a detail
Please, click for a large image
A two frame mosaic
Please, click for a large image
Three frames stitched together
Please, click for a large image
For technical details and a color versions, please, use a link under the images above.
Thursday, April 28, 2016
A collection of grayscale photos, Filaments of Cygnus
I haven't published any grayscale photos for a long time. Astronomical cameras are usually grayscale CCD-cameras since they have a better sensitivity and resolution. I have grayscale versions from all of my astronomical images. I have always been a big fan of grayscale images!
(Color images are not colorized, each RGB color channel is shot separately and combined to a final color image.)
A collection of filamental structures in Cygnus
During past year or so I have shot dim and less known filamental objects in constellation Cygnus. In this collection there are many of them as a grayscale photos.
Please, click for a large image!
Filaments of Central Cygnus, a two frame mosaic. Color image and info can be seen HERE
A wide field image mosaic of the whole Western Cygnus. Color image and info can be seen HERE
Filaments of Cygnus, a two frame mosaic of Veil Nebula supernova remnant. Color image and info can be seen HERE
Filaments of Cygnus, Veil Nebula supernova remnant. Color image and info can be seen HERE
Saturday, April 18, 2015
B&W space, Winter 2014-15
As astronomical cameras are usually cooled grayscale CCD-cameras, color images are made by shooting each color channel through a filter. For broad band RGB images usually four filters are used Luminance and RGB-filters. Due to massive light pollution in my location, I'm specialized to a narrowband imaging, it's very effective method to shoot emission nebulae, since they are emitting light in well known wavelengths. All other light can be then filtered out and let just the right wavelength pass through. I'm using the most common combination of emission lines, a light from ionized hydrogen (H-alpha), sulfur (S-II) and oxygen (O-III).
The strongest emission line is usually the H-alpha, it has most of the details also. I'm publishing here a collection of H-alpha images from the Winter season 2014-15. Sometimes B&W images can be very beautiful.
A collection of selected B&W H-alpha nebulae, Winter 2014-15
click for a large imagePelican Nebula
Pickering's Triangle in O-III light only
NGC 281
Sharpless 132
Tulip Nebula
IC 405
IC 410
IC 1805
Melotte 15
NGC 1795
NGC 1795, a blog post HERE
NGC 2175
Wednesday, March 11, 2015
A start of the new imaging project, NGC 2174, the "Monkey Head Nebula"
At March 9 I managed to exposure about four hours of H-alpha light for NGC 2147.
I'll shoot more exposures for this soon to have more signal and colors.
There seems to be some rarely imaged faint looped shapes at bottom of the object, I haven't seen them before.
NGC 2174, the Monkey Head Nebula in Orion
A starless version
An inverted image to show the bottom filaments better
Monday, October 27, 2014
A start of the new project, the Tulip Nebula
At night of 23.10 I managed to shoot 3h 20min H-alpha lights for the Tulip Nebula in constellation Cygnus.
It looks like we going to have a clear nigh ahead, I'll shoot more lights for the emission of Hydrogen and if possible, some data for other two emission lines, O-III and S-II.
I need some more signal to show better the area of Cygnus X-1, a black hole candidate. It's a strong source of X-ray emission and there are some interesting but kind of dim shock fronts around the X-1. This microquasar is a brighter of two stars above the Tulip Nebula, just middle right at one o'clock position.
The Tulip Nebula
Click for a large image
Some optical analysis
I'm amazed about the optical quality of the Celestron Edge HD 1100 with a 0.7 reducer for the Edge scope.
The massive reducer seems to do some magic, since the whole image area of the massive CCD in Apogee Alta U16 camera (36,8 x36,8mm) gets filled with a pinpoint stars from corner to corner. That shouldn't be possible, since the CCD is somehow larger, than the light path in Edge scope. See the image bellow.
As seen in the schematics, there should be some unusable areas at corners of the image.
A single uncropped, calibrated and stretched 20 min. H-alpha frame
Image above is an uncropped, calibrated and stretched, frame directly from the camera. Even the very corners are filled with a pinpoint stars.
Analysis of the image field
With the CCDInspector software
There is some very minor tweaking needed for the perfect collimation. Otherwise the image field is nearly perfectly flat. One pixel is about one arcseconds in this analysis.
Image corners as a closeup
Note. Images are from a single unprocessed, calibrated and stretched 20 min. H-alpha frame
Some very minor distortion can be seen, especially at image 2. That's due to some slight miss collimation. So large sensor is very picky about a correct distance (146,5mm), collimation and tilt.
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