The Sun

Stor solflekk 15.06.2012

Huge sunspots June 15th 2012

Just about a week after the transit of Venus the Sun prepared another great display, the emergence of sunspot 1504. So larrge that it was visible with the un-aided eye (but with proper filter of course). Below are some photos from the 14th and 15th of June.

Stor solflekk (1504) 15. juni 2012, kl. 06:55

Kamera: Point Grey Research Chameleon 1.3 Megapixel monokrom.
Teleskop: Borg ED101 F6,4 refraktor + TeleVue 2,5X Powermate (1600mm brennvidde).
Lunt solar wedge og Omega Optical filter TiO 705nm.

Huge sunspot (1504) June 15, 2012, 06:55 UT+2

Camera: Point Grey Research Chameleon 1.3 Megapixel monochrome.
Telescope: Borg ED101 F6,4 refractor + TeleVue 2,5X Powermate (1600 focal length).
Lunt solar wedge and Omega Optical filter TiO 705nm.

Stor solflekk 15. juni 2012, kl. 06:26

Kamera: Point Grey Research Chameleon 1.3 Megapixel monokrom.
Teleskop: Mini Borg ED60 F5,8 refraktor (350mm brennvidde).
Lunt solar wedge og Omega Optical filter TiO 705nm.

Huge sunspot June 15, 2012, 06:26 UT+2

Camera: Point Grey Research Chameleon 1.3 Megapixel monochrome.
Telescope: Mini Borg ED60 F5,8 refractor (350mm focal length).
Lunt solar wedge and Omega Optical filter TiO 705nm.

Stor solflekk 15. juni 2012, kl. 06:34

Kamera: Point Grey Research Chameleon 1.3 Megapixel monokrom.
Teleskop: Borg ED101 F6,4 refraktor (640mm brennvidde).
Lunt solar wedge og Omega Optical filter TiO 705nm.

Huge sunspot June 15, 2012, 06:34 UT+2

Camera: Point Grey Research Chameleon 1.3 Megapixel monochrome.
Telescope: Borg ED101 F6,4 refractor (640mm focal length).
Lunt solar wedge and Omega Optical filter TiO 705nm.

Stor solflekk 14. juni 2012, kl. 21:37

Kamera: Canon EOS450D, enkeltesponering, 1/250s, 400ISO

Teleskop: William Optics ZS 80 II ED, Primærfokus + 2X telekonverter

Huge sunspot June 14, 2012, 21:37 UT+2

Camera: Canon EOS450D, one single exposure, 1/250s, 400ISO

Telescope: William Optics ZS 80 II ED, Primary focus + 2X teleconverter

Picture taken at Sandsli outside Bergen, Norway. April 22 2012
Camera: Point Grey Research Chameleon 1.3 Megapixel monochrome.
Lens: Mini Borg ED60 F5,8 refractor (350mm focal length).

Lunt solar wedge
Filter: Omega Optical TiO 705nm.

Processing:
Avistack2: Stacked the 80 best of 100 images
Final processing in Photoshop: Unsharp mask, Levels and Curves
Colour version (mouseover): Colours added in Photoshop.

Picture taken at Sandsli outside Bergen, Norway. June 11 2005
Camera: Canon EOS 20D.
Lens: Vixen R200SS 8" reflector plus 2x Sigma APO Teleconverter (1600mm total).
Filter: Baader AstroSolar safety film.
Exposure: 1/640s at f:8, 400ISO.

Processing:
Photoshop: Cropping and saving pictures as monochrome (the green channel), 16 bit TIFF

Registax 3: Stacked the 4 best of 18 images
Wavelets: 1; 3,1; 3,1; 2,4; 1; 1

Final processing in Photoshop:
Unsharp mask: 150 / 4 / 2
Levels 0,60
Contrast: +15

Colour version:

The Sun

Sharpness and contrast is better in monochrome (green channel is usually best)