Solar Images 2001

Sunspots groups NOAA 9628 and 9632 on 25 September 2001. Vixen achromat refractor D=100 mm, F=1000 mm. Baader AstroSolar filter. Televue Barlow 1.8x. CCD camera SBIG ST-8 + CFW8, 0.11 s, half frame, 0° C, green filter. Image processing: Unsharp mask and Max Entropy filters in AstroArt.

Solar disk and sunspots on 05 Aug 2001. Nikon Coolpix 995 digital camera, afocal on Vixen refractor 100 mm f/10 + 36 mm Plösll Vixen eyepiece + Baader AstroSolar filter.

-1 diafragm stop correction from automatic reading. The image size can be adjusted by use of the zoomlens of the camera.

Sunspot NOAA 9557 on 04 Aug 2001. Philips ToUcam Pro webcam + Vixen refractor 100 mm f/10 + Televue Barlow 1.8 + Baader AstroSolar + Infrared rejection filter + green filter.

The image on the left was with manual exposure adjustment, the image on the right with automatic exposure. Image scale is the same, only different cropping.

A few sunspots imaged on 22 July 2001.