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238 results for “jdlbt”
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The Elephant Trunk Nebula (IC 1396) in the constellation Cepheus in SHO palette.
This image was captured over three nights with an OSC (RGB) camera and two different dual narrow-band filters (Sulphur + Oxygen and Hydrogen + Oxygen emissions) allowing the SHO palette (Sulphur=Red, Hydrogen=Green and Oxygen=Blue). SHO images are usually captured with a monochrome camera and three separate narrow-band filters, one for each emission line.
Technical details, high resolution and annotated versions available on Telescopius: https://telescopius.com/pictures/view/193251/deep_sky/elephant-trunk/IC/1396/diffuse-nebula/elephant-trunk-nebula/by-drgfreeman
Image license: CC-BY-NC-SA 4.0.
#astrophotography #astronomy #photography #astrodon #nebula #DeepSky #space #ic1396 #kstars #ekos #phd2
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The Elephant Trunk Nebula (IC 1396) in the constellation Cepheus in SHO palette.
This image was captured over three nights with an OSC (RGB) camera and two different dual narrow-band filters (Sulphur + Oxygen and Hydrogen + Oxygen emissions) allowing the SHO palette (Sulphur=Red, Hydrogen=Green and Oxygen=Blue). SHO images are usually captured with a monochrome camera and three separate narrow-band filters, one for each emission line.
Technical details, high resolution and annotated versions available on Telescopius: https://telescopius.com/pictures/view/193251/deep_sky/elephant-trunk/IC/1396/diffuse-nebula/elephant-trunk-nebula/by-drgfreeman
Image license: CC-BY-NC-SA 4.0.
#astrophotography #astronomy #photography #astrodon #nebula #DeepSky #space #ic1396 #kstars #ekos #phd2
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The Elephant Trunk Nebula (IC 1396) in the constellation Cepheus in SHO palette.
This image was captured over three nights with an OSC (RGB) camera and two different dual narrow-band filters (Sulphur + Oxygen and Hydrogen + Oxygen emissions) allowing the SHO palette (Sulphur=Red, Hydrogen=Green and Oxygen=Blue). SHO images are usually captured with a monochrome camera and three separate narrow-band filters, one for each emission line.
Technical details, high resolution and annotated versions available on Telescopius: https://telescopius.com/pictures/view/193251/deep_sky/elephant-trunk/IC/1396/diffuse-nebula/elephant-trunk-nebula/by-drgfreeman
Image license: CC-BY-NC-SA 4.0.
#astrophotography #astronomy #photography #astrodon #nebula #DeepSky #space #ic1396 #kstars #ekos #phd2
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The Elephant Trunk Nebula (IC 1396) in the constellation Cepheus in SHO palette.
This image was captured over three nights with an OSC (RGB) camera and two different dual narrow-band filters (Sulphur + Oxygen and Hydrogen + Oxygen emissions) allowing the SHO palette (Sulphur=Red, Hydrogen=Green and Oxygen=Blue). SHO images are usually captured with a monochrome camera and three separate narrow-band filters, one for each emission line.
Technical details, high resolution and annotated versions available on Telescopius: https://telescopius.com/pictures/view/193251/deep_sky/elephant-trunk/IC/1396/diffuse-nebula/elephant-trunk-nebula/by-drgfreeman
Image license: CC-BY-NC-SA 4.0.
#astrophotography #astronomy #photography #astrodon #nebula #DeepSky #space #ic1396 #kstars #ekos #phd2
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My son set me up. He bought new tires for my road bike I haven't used in over 6 years* and bought slick tires to put on my gravel bike so he can use it as a road bike for himself.
* I haven't made any other form of physical activity either
We just went for a 30 km ride. I feel like I have no energy left whatsoever, and my legs hurt!
On the positive:
- I still fit in my bibs
- I can still get in the drops without my back hurting
- I liked it and may get back into cycling more often! -
I'm quite happy how the Sii + Oiii data on the Elephant Trunk Nebula from my last two sessions turned out.
This is ~7.5h of data captured with an OSC (RGB) camera and the Askar Color Magic D2 dual narrow-band filter without any processing except for a basic histogram stretch.
Unlike most dual narrow band filters, this filter passes the Sulphur (Sii) emission instead of the usual Hydrogen emission into the red channel of the camera. The blue and green channels capture the Oxygen (Oiii) emission like typical dual narrow-band filters do.
I will combine this data with the Ha data I captured last year to make a SHO image (Sulphur=Red, Hydrogen=Green, Oxygen=Blue) image.
#astrophotography #astronomy #astrodon #photography #DeepSky #nebula #space #NarrowBand
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Trust me, I'm an engineer!
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Trust me, I'm an engineer!
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Trust me, I'm an engineer!
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Trust me, I'm an engineer!
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Trust me, I'm an engineer!
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The Pelican Nebula (IC 5070) is an emission nebula associated with the North America Nebula in the constellation Cygnus. It is separated from the North America Nebula by a foreground molecular dust cloud.
Annotated & high quality versions and technical details available on Telescopius: https://telescopius.com/pictures/view/191806/deep_sky/pelican-nebula/IC/5070/bright-nebula/pelican-nebula/by-drgfreeman
The work on the Newtonian paid off and I'm happy with the results. This was the first time I tried the 150 mm f/5 Newtonian with the Starizona Nexus 0.75x coma corrector/reducer and my older ASI183MC Pro camera. The pixel scale (0.88"/px) with this setup is a good match with the scope's resolution limit and the faster focal ratio of f/3.7 with the reducer helps with the somewhat noisier camera.
Image license: CC-BY-NC-SA 4.0
#astrophotography #astronomy #nebula #deepsky #photography #astroberry #kstars #ekos #phd2 #astrodon
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The Pelican Nebula (IC 5070) is an emission nebula associated with the North America Nebula in the constellation Cygnus. It is separated from the North America Nebula by a foreground molecular dust cloud.
Annotated & high quality versions and technical details available on Telescopius: https://telescopius.com/pictures/view/191806/deep_sky/pelican-nebula/IC/5070/bright-nebula/pelican-nebula/by-drgfreeman
The work on the Newtonian paid off and I'm happy with the results. This was the first time I tried the 150 mm f/5 Newtonian with the Starizona Nexus 0.75x coma corrector/reducer and my older ASI183MC Pro camera. The pixel scale (0.88"/px) with this setup is a good match with the scope's resolution limit and the faster focal ratio of f/3.7 with the reducer helps with the somewhat noisier camera.
Image license: CC-BY-NC-SA 4.0
#astrophotography #astronomy #nebula #deepsky #photography #astroberry #kstars #ekos #phd2 #astrodon
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The Pelican Nebula (IC 5070) is an emission nebula associated with the North America Nebula in the constellation Cygnus. It is separated from the North America Nebula by a foreground molecular dust cloud.
Annotated & high quality versions and technical details available on Telescopius: https://telescopius.com/pictures/view/191806/deep_sky/pelican-nebula/IC/5070/bright-nebula/pelican-nebula/by-drgfreeman
The work on the Newtonian paid off and I'm happy with the results. This was the first time I tried the 150 mm f/5 Newtonian with the Starizona Nexus 0.75x coma corrector/reducer and my older ASI183MC Pro camera. The pixel scale (0.88"/px) with this setup is a good match with the scope's resolution limit and the faster focal ratio of f/3.7 with the reducer helps with the somewhat noisier camera.
Image license: CC-BY-NC-SA 4.0
#astrophotography #astronomy #nebula #deepsky #photography #astroberry #kstars #ekos #phd2 #astrodon
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The Pelican Nebula (IC 5070) is an emission nebula associated with the North America Nebula in the constellation Cygnus. It is separated from the North America Nebula by a foreground molecular dust cloud.
Annotated & high quality versions and technical details available on Telescopius: https://telescopius.com/pictures/view/191806/deep_sky/pelican-nebula/IC/5070/bright-nebula/pelican-nebula/by-drgfreeman
The work on the Newtonian paid off and I'm happy with the results. This was the first time I tried the 150 mm f/5 Newtonian with the Starizona Nexus 0.75x coma corrector/reducer and my older ASI183MC Pro camera. The pixel scale (0.88"/px) with this setup is a good match with the scope's resolution limit and the faster focal ratio of f/3.7 with the reducer helps with the somewhat noisier camera.
Image license: CC-BY-NC-SA 4.0
#astrophotography #astronomy #nebula #deepsky #photography #astroberry #kstars #ekos #phd2 #astrodon
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The Pelican Nebula (IC 5070) is an emission nebula associated with the North America Nebula in the constellation Cygnus. It is separated from the North America Nebula by a foreground molecular dust cloud.
Annotated & high quality versions and technical details available on Telescopius: https://telescopius.com/pictures/view/191806/deep_sky/pelican-nebula/IC/5070/bright-nebula/pelican-nebula/by-drgfreeman
The work on the Newtonian paid off and I'm happy with the results. This was the first time I tried the 150 mm f/5 Newtonian with the Starizona Nexus 0.75x coma corrector/reducer and my older ASI183MC Pro camera. The pixel scale (0.88"/px) with this setup is a good match with the scope's resolution limit and the faster focal ratio of f/3.7 with the reducer helps with the somewhat noisier camera.
Image license: CC-BY-NC-SA 4.0
#astrophotography #astronomy #nebula #deepsky #photography #astroberry #kstars #ekos #phd2 #astrodon
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I designed and 3D printed a Tri-Bahtinov mask to help verify the collimation of my Newtonian telescope. This mask is similar to a regular Bahtinov mask except it has three times the Bahtinov pattern rotated 120° apart. Aligning the mask patterns with the collimation screws of the primary mirror cell allows using each of the three diffraction patterns to set each of the screws. More info here: https://en.wikipedia.org/wiki/Bahtinov_mask
The Tri-Bahtinov pattern was generated with this great tool: https://satakagi.github.io/tribahtinovWebApps/Tri-Bahtinov_symmetric.html, exported to .svg, then converted to .dxf and imported in the CAD software to produce the complete mask 3D model.
I used three neodymium magnets to hold the mask to telescope using the ring with 6 magnets I designed to hold the telescope dew shield.
#astrophotography #astronomy #Astrodon #3DPrinting #Design #telescope #kstar #ekos #inkscape #foss #Astrodon
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Yesterday's guiding. Never had this good guiding before! The whole night was between this and 0.45". This is with the 6" Newtonian on the HEQ5 (belt modded) and an off axis guider (0.88"/px). No wind and exceptionally good seeing for this corner of the world.
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Well, it was a fun exercise but: More (and better) data please!
A few issues I encountered:
- 6 sub-exposures are not enough for statistics to do their magic (outlier rejection). Result, a "musktrace" (satellite trace) remains visible to the right of the cluster.
- 6 sub-exposures are also not enough for drizzle integration with adequate coverage. I ended up using the 2x drizzled master as luminance, combined with the blurred 2x upscaled master (to match the 2x drizzled luminance) for color.
- I had to dim the background more than I would usually do to reduce the impact of the large scale noise. -
A view of the extensive H II emission regions in the constellation Cygnus, just North of the star Sadr (γ Cygni), which forms the intersection of the asterism known as the Northern Cross.
At the bottom right is the NGC 6914 reflection nebula, blue halos created by the reflection of the light from blue giant stars on the surrounding interstellar dust.
The field of view is 3.2 x 2.1 degrees, with the celestial North to the left of the image.
High quality/resolution version & technical details on Telescopius: https://telescopius.com/pictures/view/191255/deep_sky/NGC/6914/bright-nebula/north-west-of-gamma-cygni/by-drgfreeman
Image license: CC-BY-NC-SA 4.0
#astrophotography #astronomy #nebula #deepsky #photography #astroberry #kstars #ekos #phd2 #DarkTable #raspberrypi #astrodon
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A view of the extensive H II emission regions in the constellation Cygnus, just North of the star Sadr (γ Cygni), which forms the intersection of the asterism known as the Northern Cross.
At the bottom right is the NGC 6914 reflection nebula, blue halos created by the reflection of the light from blue giant stars on the surrounding interstellar dust.
The field of view is 3.2 x 2.1 degrees, with the celestial North to the left of the image.
High quality/resolution version & technical details on Telescopius: https://telescopius.com/pictures/view/191255/deep_sky/NGC/6914/bright-nebula/north-west-of-gamma-cygni/by-drgfreeman
Image license: CC-BY-NC-SA 4.0
#astrophotography #astronomy #nebula #deepsky #photography #astroberry #kstars #ekos #phd2 #DarkTable #raspberrypi #astrodon
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A view of the extensive H II emission regions in the constellation Cygnus, just North of the star Sadr (γ Cygni), which forms the intersection of the asterism known as the Northern Cross.
At the bottom right is the NGC 6914 reflection nebula, blue halos created by the reflection of the light from blue giant stars on the surrounding interstellar dust.
The field of view is 3.2 x 2.1 degrees, with the celestial North to the left of the image.
High quality/resolution version & technical details on Telescopius: https://telescopius.com/pictures/view/191255/deep_sky/NGC/6914/bright-nebula/north-west-of-gamma-cygni/by-drgfreeman
Image license: CC-BY-NC-SA 4.0
#astrophotography #astronomy #nebula #deepsky #photography #astroberry #kstars #ekos #phd2 #DarkTable #raspberrypi #astrodon
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A view of the extensive H II emission regions in the constellation Cygnus, just North of the star Sadr (γ Cygni), which forms the intersection of the asterism known as the Northern Cross.
At the bottom right is the NGC 6914 reflection nebula, blue halos created by the reflection of the light from blue giant stars on the surrounding interstellar dust.
The field of view is 3.2 x 2.1 degrees, with the celestial North to the left of the image.
High quality/resolution version & technical details on Telescopius: https://telescopius.com/pictures/view/191255/deep_sky/NGC/6914/bright-nebula/north-west-of-gamma-cygni/by-drgfreeman
Image license: CC-BY-NC-SA 4.0
#astrophotography #astronomy #nebula #deepsky #photography #astroberry #kstars #ekos #phd2 #DarkTable #raspberrypi #astrodon
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A view of the extensive H II emission regions in the constellation Cygnus, just North of the star Sadr (γ Cygni), which forms the intersection of the asterism known as the Northern Cross.
At the bottom right is the NGC 6914 reflection nebula, blue halos created by the reflection of the light from blue giant stars on the surrounding interstellar dust.
The field of view is 3.2 x 2.1 degrees, with the celestial North to the left of the image.
High quality/resolution version & technical details on Telescopius: https://telescopius.com/pictures/view/191255/deep_sky/NGC/6914/bright-nebula/north-west-of-gamma-cygni/by-drgfreeman
Image license: CC-BY-NC-SA 4.0
#astrophotography #astronomy #nebula #deepsky #photography #astroberry #kstars #ekos #phd2 #DarkTable #raspberrypi #astrodon
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Measuring focuser backlash on the Newtonian and dialing in backlash compensation in the Ekos software focus tab.
The objective is to find the largest displacements (number of steps of the stepper motor) that does not move the dial gauge needle when making alternated in and out focuser movements. Once the backlash compensation value is dialed in, the software will add this number of steps to the requested focuser movement when changing direction. This should help repeatability of the auto-focus routine that uses measurement of star size at different focuser positions to achieve the best focus.
#astrophotography #astronomy #astrodon #precision #kstars #ekos #astroberry #foss
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Measuring focuser backlash on the Newtonian and dialing in backlash compensation in the Ekos software focus tab.
The objective is to find the largest displacements (number of steps of the stepper motor) that does not move the dial gauge needle when making alternated in and out focuser movements. Once the backlash compensation value is dialed in, the software will add this number of steps to the requested focuser movement when changing direction. This should help repeatability of the auto-focus routine that uses measurement of star size at different focuser positions to achieve the best focus.
#astrophotography #astronomy #astrodon #precision #kstars #ekos #astroberry #foss
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Measuring focuser backlash on the Newtonian and dialing in backlash compensation in the Ekos software focus tab.
The objective is to find the largest displacements (number of steps of the stepper motor) that does not move the dial gauge needle when making alternated in and out focuser movements. Once the backlash compensation value is dialed in, the software will add this number of steps to the requested focuser movement when changing direction. This should help repeatability of the auto-focus routine that uses measurement of star size at different focuser positions to achieve the best focus.
#astrophotography #astronomy #astrodon #precision #kstars #ekos #astroberry #foss
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Measuring focuser backlash on the Newtonian and dialing in backlash compensation in the Ekos software focus tab.
The objective is to find the largest displacements (number of steps of the stepper motor) that does not move the dial gauge needle when making alternated in and out focuser movements. Once the backlash compensation value is dialed in, the software will add this number of steps to the requested focuser movement when changing direction. This should help repeatability of the auto-focus routine that uses measurement of star size at different focuser positions to achieve the best focus.
#astrophotography #astronomy #astrodon #precision #kstars #ekos #astroberry #foss
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Measuring focuser backlash on the Newtonian and dialing in backlash compensation in the Ekos software focus tab.
The objective is to find the largest displacements (number of steps of the stepper motor) that does not move the dial gauge needle when making alternated in and out focuser movements. Once the backlash compensation value is dialed in, the software will add this number of steps to the requested focuser movement when changing direction. This should help repeatability of the auto-focus routine that uses measurement of star size at different focuser positions to achieve the best focus.
#astrophotography #astronomy #astrodon #precision #kstars #ekos #astroberry #foss