Friday, March 3, 2017
The central Cygnus as a cinemascope format image set
I have worked with a cinemascope format movie from my photos for a movie theatre presentation. This is an extra wide ~21:9 format used in theatres. The actual film is not ready yet but I have some of my images converted to this ultra wide format. I think they will look great at a large movie screen! I'll publish some of individual panoramic format photos here,
Central Cygnus image set
Be sure to click for a full resolution image, ~2600 x 1200 pixels
Image details can be seen HERE
Image details can be seen HERE
Image details can be seen HERE
Previously published sets of my cinemascope format astro images
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.
Monday, February 6, 2017
A new photo, Sharpless 188 (Sh2-188) in Cassiopeia
Kind of difficult target due to dim outer parts at left in my photo. I collected lights for this object couple of nights between. and 21. January 2017. This photo is also a good sample of my new imaging method VARES (Variable Resolution imaging). More info in technical details bellow.
Sharpless 188, a Planetary Nebula in Cassiopeia
Please, click for a large image
Image is in mapped colours, from the emission of ionized elements, R=Sulphur, G=Hydrogen and B=Oxygen.
Sh2-188 in visual colors
Please, click for a large image
Image is in Natural colour palette from the emission of ionized elements,
R=Hydrogen + Sulphur, G=Oxygen and B=Oxygen + ~10% Hydrogen.
Sh2-188, H-alpha emission alone
Please, click for a large image
INFO
Sh2-188 (Sharpless2 188) a planetary nebula that is moving through the Inter Stellar Medium. The nebula is considered to be one of the most extreme examples of planetary nebula and ISM interaction. The bright parts of the filamentary rim is the shock front with a faint tail of material stretching away at opposite direction. (Source, http://www.imagingdeepsky.com/Nebulae/SH188/Sh2-188.htm)
Technical details
NOTE!
A new immaging technique of mine was used for this photo. I call it VARES (Variable Resolution imaging). The data is collected by using different binning levels from 1x1 down to 6x6. High signal/noise elements, like brighter stars and more luminous parts of the nebula, are from less binned exposures. Low signal/noise elements, like very dim and featureless outer parts, are from more binned exposures, this time all the way down to bin 6x6. (Apogee Alta U16 has a 4096 x 4096 pixels CCD. At bin 6 x 6, the output image has still 682 x 682 pixels in it)
Total exposure time for H-alpha is 12h but if the effects of binning is calculated in, the signal is practically the same as from 140 hours of exposures, if all are binned 1x1!
With this method, I can have high resolution details and good S/N for dimmer, less detailed, parts of the nebula with minimal exposure time.
In near future, I will write a tutorial about the VARES method. It might take some time though.
Total exposure time for H-alpha is 12h but if the effects of binning is calculated in, the signal is practically the same as from 140 hours of exposures, if all are binned 1x1!
With this method, I can have high resolution details and good S/N for dimmer, less detailed, parts of the nebula with minimal exposure time.
In near future, I will write a tutorial about the VARES method. It might take some time though.
Processing work flow
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
Celestron Edge HD 1100 @ f10 with 0,7 focal reducer for Edge HD 1100 telescope
Mount
10-micron 1000
Cameras and filters
Imaging camera Apogee Alta U16 and Apogee seven slot filter wheel
Guider camera, Lodestar x 2 and SXV-AOL
Astrodon filter, 5nm H-alpha
Astrodon filter, 3nm O-III
Astrodon filter, 3nm S-II
Exposure times
H-alpha, 6x 1200s, binned 1x1 = 2h
H-alpha, 21x 1200s, binned 2x2 = 7h
H-alpha, 9x 1200s, binned 6x6 = 3h
H-alpha, 21x 1200s, binned 2x2 = 7h
H-alpha, 9x 1200s, binned 6x6 = 3h
O-III, 3 x 1200s binned 6x6 = 1h
S-II, 3 x 1200s binned 6x6 = 1h
Total 14h
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