The Flickr Sh2308 Image Generatr

This is the final version of the series. It took 3 successive nights to obtain the data, and I could enjoy processing them for a week. I put 60-second and 240-second frames taken with clear filter on HII OIII enhanced starless frame. It resulted in this dust and gas enhanced and stars smaller and crisp image. I could make this deeper image with the gimmick easily. I am happy at the final result.

Equipment: Sigma 28mmF1.4 "Art," IDAS NB12 Dual Narrowband Filter or Clear Filter, and EOS R6-SP5, modified by Seo San on ZWO AM5 Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 120MM-mini, and PHD2 Guiding

Exposure: 9 times x 1,800 seconds, 8 x 900 sec, 11 x 240 sec, and 12 x 60 seconds at ISO 6,400 and f/3.5 with NB12 Filter and 7 times x 900 seconds, 4 x 240 sec, and 4 x 60 seconds at ISO 1,600 and f/3.5 with Clear Filter

site: 2,434m above sea level at lat. 24 39 52 south and long. 70 16 11 west near Cerro Armazones in Sierra Vicuña Mackenna in Coast Range of Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.78 at the night.

This is the final version of the series. It took 3 successive nights to obtain the data, and I could enjoy processing them for a week. I put 60-second and 240-second frames taken with clear filter on HII OIII enhanced starless frame. It resulted in this dust and gas enhanced and stars crisp image. Great Carina Nebula was bright here.

Equipment: Sigma 28mmF1.4 "Art," IDAS NB12 Dual Narrowband Filter or Clear Filter, and EOS R6-SP5, modified by Seo San on ZWO AM5 Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 120MM-mini, and PHD2 Guiding

Exposure: 9 times x 1,800 seconds, 8 x 900 sec, 11 x 240 sec, and 12 x 60 seconds at ISO 6,400 and f/3.5 with NB12 Filter and 7 times x 900 seconds, 4 x 240 sec, and 4 x 60 seconds at ISO 1,600 and f/3.5 with Clear Filter

site: 2,434m above sea level at lat. 24 39 52 south and long. 70 16 11 west near Cerro Armazones in Sierra Vicuña Mackenna in Coast Range of Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.78 at the night.

Vela SNR got clearer with dual narrowband filter.

Equipment: Sigma 28mmF1.4 "Art," IDAS NB12 Dual Narrowband Filter or Clear Filter, and EOS R6-SP5, modified by Seo San on ZWO AM5 Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 120MM-mini, and PHD2 Guiding

Exposure: 9 times x 1,800 seconds, 8 x 900 sec, 11 x 240 sec, and 12 x 60 seconds at ISO 6,400 and f/3.5 with NB12 Filter and 7 times x 900 seconds, 4 x 240 sec, and 4 x 60 seconds at ISO 1,600 and f/3.5 with Clear Filter

site: 2,434m above sea level at lat. 24 39 52 south and long. 70 16 11 west near Cerro Armazones in Sierra Vicuña Mackenna in Coast Range of Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.78 at the night.

Vela SNR got clearer with dual narrowband filter.

Equipment: Sigma 28mmF1.4 "Art," IDAS NB12 Dual Narrowband Filter or Clear Filter, and EOS R6-SP5, modified by Seo San on ZWO AM5 Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 120MM-mini, and PHD2 Guiding

Exposure: 9 times x 1,800 seconds, 8 x 900 sec, 11 x 240 sec, and 12 x 60 seconds at ISO 6,400 and f/3.5 with NB12 Filter and 7 times x 900 seconds, 4 x 240 sec, and 4 x 60 seconds at ISO 1,600 and f/3.5 with Clear Filter

site: 2,434m above sea level at lat. 24 39 52 south and long. 70 16 11 west near Cerro Armazones in Sierra Vicuña Mackenna in Coast Range of Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.78 at the night.

Vela SNR got clearer with dual narrowband filter. Stars near left upper corner trailed due to differential atmospheric refraction near the horizon.

Equipment: Sigma 28mmF1.4 "Art," IDAS NB12 Dual Narrowband Filter or Clear Filter, and EOS R6-SP5, modified by Seo San on ZWO AM5 Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 120MM-mini, and PHD2 Guiding

Exposure: 9 times x 1,800 seconds, 8 x 900 sec, 11 x 240 sec, and 12 x 60 seconds at ISO 6,400 and f/3.5 with NB12 Filter and 7 times x 900 seconds, 4 x 240 sec, and 4 x 60 seconds at ISO 1,600 and f/3.5 with Clear Filter

site: 2,434m above sea level at lat. 24 39 52 south and long. 70 16 11 west near Cerro Armazones in Sierra Vicuña Mackenna in Coast Range of Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.78 at the night.

Vela SNR got clearer with dual narrowband filter. Stars near left upper corner trailed due to differential atmospheric refraction near the horizon.

Equipment: Sigma 28mmF1.4 "Art," IDAS NB12 Dual Narrowband Filter or Clear Filter, and EOS R6-SP5, modified by Seo San on ZWO AM5 Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 120MM-mini, and PHD2 Guiding

Exposure: 9 times x 1,800 seconds, 8 x 900 sec, 11 x 240 sec, and 12 x 60 seconds at ISO 6,400 and f/3.5 with NB12 Filter and 7 times x 900 seconds, 4 x 240 sec, and 4 x 60 seconds at ISO 1,600 and f/3.5 with Clear Filter

site: 2,434m above sea level at lat. 24 39 52 south and long. 70 16 11 west near Cerro Armazones in Sierra Vicuña Mackenna in Coast Range of Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.78 at the night.

Vela SNR got far clearer with the filter and starless conversion. It was visible clearly that oxygen III clouds of Vela SuperNova Remnant were distributed faintly and widely toward west. I hope to image the area again with longer optics.

Equipment: Sigma 28mmF1.4 "Art," IDAS NB12 Dual Narrowband Filter, and EOS R6-SP5, modified by Seo San on ZWO AM5 Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 120MM-mini, and PHD2 Guiding

Exposure: 9 times x 1,800 seconds, 8 x 900 sec, 11 x 240 sec, and 12 x 60 seconds at ISO 6,400 and f/3.5

site: 2,434m above sea level at lat. 24 39 52 south and long. 70 16 11 west near Cerro Armazones in Sierra Vicuña Mackenna in Coast Range of Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.78 at the night.

Vela SNR got far clearer with the filter and starless conversion. It was visible clearly that oxygen III clouds of Vela SuperNova Remnant were distributed faintly and widely toward west. I hope to image the area again with longer optics.

Equipment: Sigma 28mmF1.4 "Art," IDAS NB12 Dual Narrowband Filter, and EOS R6-SP5, modified by Seo San on ZWO AM5 Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 120MM-mini, and PHD2 Guiding

Exposure: 9 times x 1,800 seconds, 8 x 900 sec, 11 x 240 sec, and 12 x 60 seconds at ISO 6,400 and f/3.5

site: 2,434m above sea level at lat. 24 39 52 south and long. 70 16 11 west near Cerro Armazones in Sierra Vicuña Mackenna in Coast Range of Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.78 at the night.

Vela SNR got clearer with the filter. Stars near left upper corner trailed due to differential atmospheric refraction near the horizon.

Equipment: Sigma 28mmF1.4 "Art," IDAS NB12 Dual Narrowband Filter, and EOS R6-SP5, modified by Seo San on ZWO AM5 Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 120MM-mini, and PHD2 Guiding

Exposure: 9 times x 1,800 seconds, 8 x 900 sec, 11 x 240 sec, and 12 x 60 seconds at ISO 6,400 and f/3.5

site: 2,434m above sea level at lat. 24 39 52 south and long. 70 16 11 west near Cerro Armazones in Sierra Vicuña Mackenna in Coast Range of Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.78 at the night.

Vela SNR got clearer with the filter. Stars near left upper corner trailed due to differential atmospheric refraction near the horizon.

Equipment: Sigma 28mmF1.4 "Art," IDAS NB12 Dual Narrowband Filter, and EOS R6-SP5, modified by Seo San on ZWO AM5 Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 120MM-mini, and PHD2 Guiding

Exposure: 9 times x 1,800 seconds, 8 x 900 sec, 11 x 240 sec, and 12 x 60 seconds at ISO 6,400 and f/3.5

site: 2,434m above sea level at lat. 24 39 52 south and long. 70 16 11 west near Cerro Armazones in Sierra Vicuña Mackenna in Coast Range of Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.78 at the night.

Equipment: Sigma 28mmF1.4 "Art" and EOS R6-SP5, modified by Seo San on ZWO AM5 Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 120MM-mini, and PHD2 Guiding

Exposure: 7 times x 900 seconds, 4 x 240 sec, and 4 x 60 seconds at ISO 1,600 and f/3.5

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

Equipment: Sigma 28mmF1.4 "Art" and EOS R6-SP5, modified by Seo San on ZWO AM5 Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 120MM-mini, and PHD2 Guiding

Exposure: 7 times x 900 seconds, 4 x 240 sec, and 4 x 60 seconds at ISO 1,600 and f/3.5

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

Equipment: Sigma 28mmF1.4 "Art" and EOS R6-SP5, modified by Seo San on ZWO AM5 Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 120MM-mini, and PHD2 Guiding

Exposure: 7 times x 900 seconds, 4 x 240 sec, and 4 x 60 seconds at ISO 1,600 and f/3.5

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

Dolphin nebular SH2-308. This nebula is ~70 000 old. The blue color is from the ioniezed oxygen. It’s in aprox. 5200 Lightyears distance to my house. 20x90 Seconds in RGB & 2x ~13 hours in OII + h-alpha line. The data for the Picture was captured during Jan & Feb 2025.

Captured with the qhy268c gain 56 a 94EDPH APO, tracked with a cem26.
Stackend in Pixinsight and PP in Photoshop.

Sh 2-308, also designated as Sharpless 308, RCW 11, or LBN 1052, and commonly known as the Dolphin Head Nebula, is an H II region located near the center of the constellationCanis Major, composed of ionised hydrogen.=10.5px The nebula is bubble-like and surrounds a Wolf–Rayet star named EZ Canis Majoris. [Wiki]

Imaged over 9 nights in January and February 2025 from my backyard in Gérgal, Almeria, Spain.
Composite image of 20 hours of Ha and Oiii with RGB stars using my William Optics GT81, ASI2600MM camera and ZWO filters.

Full resolution and imaging details at astrob.in/lsunmo/0/

SH2-308, also known as the Dolphin Nebula, is a stunning cosmic bubble of ionized gas surrounding a dying Wolf-Rayet star. From the quiet village of Manton in New South Wales, Australia, this elusive nebula was captured over seven hours of imaging, revealing its delicate, wispy structure against the vastness of space. The processing, done from Sweden, brought out the intricate details of this celestial marvel, showcasing the nebula's ethereal glow and subtle hues.

Equipment: Sigma 105mmF1.4 "Art", IDAS NB12 Dual Narrowband Filter or Clear Filter, and EOS R-SP4ii, modified by Seo San on ZWO AM5 Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 120MM-mini, and PHD2 Guiding

Exposure: 10 times x 1800 seconds, 8 x 900 sec, 13 x 240 sec, 19 x 60 seconds at ISO 6,400 and f/3.2 with NB12 Filter and 27 times x 900 seconds, 7 x 240 sec, 9 x 60 second at ISO 1,600 and f/3.2 with Clear Filter

site: 2,434m above sea level at lat. 24 39 52 south and long. 70 16 11 west near Cerro Armazones in Sierra Vicuña Mackenna in Coast Range of Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.78 at the night.

I could make deep and color-balanced frame with dual narrowband filter without extreme enhancement of color saturation.

Seagull Nebula with Apo-Elmarit-R 180mmF2.8 January 2014:
www.flickr.com/photos/hiroc/13418703273

Equipment: Sigma 105mmF1.4 "Art", IDAS NB12 Dual Narrowband Filter or Clear Filter, and EOS R-SP4ii, modified by Seo San on ZWO AM5 Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 120MM-mini, and PHD2 Guiding

Exposure: 10 times x 1800 seconds, 8 x 900 sec, 13 x 240 sec, 19 x 60 seconds at ISO 6,400 and f/3.2 with NB12 Filter and 27 times x 900 seconds, 7 x 240 sec, 9 x 60 second at ISO 1,600 and f/3.2 with Clear Filter

site: 2,434m above sea level at lat. 24 39 52 south and long. 70 16 11 west near Cerro Armazones in Sierra Vicuña Mackenna in Coast Range of Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.78 at the night.

Equipment: Sigma 105mmF1.4 "Art", IDAS NB12 Dual Narrowband Filter, and EOS R-SP4ii, modified by Seo San on ZWO AM5 Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 120MM-mini, and PHD2 Guiding

Exposure: 10 times x 1800 seconds, 8 x 900 sec, 13 x 240 sec, 19 x 60 seconds at ISO 6,400 and f/3.2

site: 2,434m above sea level at lat. 24 39 52 south and long. 70 16 11 west near Cerro Armazones in Sierra Vicuña Mackenna in Coast Range of Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild. Sky was dark, and SQML was 21.69 at the night.

Equipment: Sigma 105mmF1.4 "Art", IDAS NB12 Dual Narrowband Filter, and EOS R-SP4ii, modified by Seo San on ZWO AM5 Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 120MM-mini, and PHD2 Guiding

Exposure: 10 times x 1800 seconds, 8 x 900 sec, 13 x 240 sec, 19 x 60 seconds at ISO 6,400 and f/3.2

site: 2,434m above sea level at lat. 24 39 52 south and long. 70 16 11 west near Cerro Armazones in Sierra Vicuña Mackenna in Coast Range of Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild. Sky was dark, and SQML was 21.69 at the night.