 The Sun in white light, 2005 April 16, a single 1/15-s exposure with a Canon-EOS 300D Digital Rebel AstroCamera (modified for astrophotography by Hutech) at ASA 100 through a Unitron 102-mm refractor at f/14.7 and a Thousand Oaks solar filter and unsharp masked by F. Ringwald.
|  Solar observing at the Vintage Days Fair, 2005 April 16, snapshot by F. Ringwald.  The Sun in H alpha light, 2005 April 16, full-color Registax stack of 70 (out of 328) x 1/30-s Philips ToUcam II exposures through a Coronado Helios 1 (70mm, f/5.7, 0.8nm bandpass) solar telescope and unsharp masked by F. Ringwald.
|  The Sun in H alpha light, 2005 April 16, full-color Registax stack of 71 (out of 321) x 1/30-s Philips ToUcam II exposures through a Coronado Helios 1 (70mm, f/5.7, 0.8nm bandpass) solar telescope and unsharp masked by F. Ringwald.
|  The Sun with three large sunspot groups in 2003 November, 1/8-s white-light exposure on 200-speed Kodak Gold 35-mm film through an Orion 90mm refractor and an Orion full-aperture glass solar filter at f/10 and unsharp-masked by F. Ringwald.
|  The Sun with two sunspot groups on 2006 December 1, average of ten (out of 114) 1/160-s white-light exposures with a Canon-EOS 300D Digital Rebel AstroCamera (modified for astrophotography by Hutech) at ASA 100 through an Orion 90mm refractor and an Orion full-aperture glass solar filter at f/10 and wavelet processed by F. Ringwald.
|  The quiet Sun, near Solar minimum on 2006 September 22, a single 1/160-s white-light exposure with a Canon-EOS 300D Digital Rebel AstroCamera (modified for astrophotography by Hutech) at ASA 100 through an Orion 90mm refractor and an Orion full-aperture glass solar filter at f/10 and unsharp-masked by F. Ringwald. |
 The Sun's lower chromosphere, 2007 March 3, full-color Registax stack of 39 (out of 913) x 1/15-s Philips ToUcam III exposures through a Coronado Ca K (70mm, f/5.7, 0.22nm bandpass centered at 393.4nm) solar telescope and wavelet processed by F. Ringwald. |
 The Quiet Sun in CaK, 2007 April 21, full-color Registax stack of 87 (out of 443) x 1/15-s Orion StarShoot Solar System Color Imager II exposures through a Coronado Ca K (70mm, f/5.7, 0.22nm bandpass centered at 393.4nm) solar telescope and wavelet processed by F. Ringwald. |
 A solar halo, April 30, 2006, snapshot taken with a Canon-EOS 300D Digital Rebel DSLR camera (modified for astrophotography by Hutech) at ISO 100 through a Canon EF 15mm f/2.8 fisheye lens by F. Ringwald.
|  The Sun in CaK, 2007 June 27, full-color Registax stack of 130 (out of 594) x 1/15-s Orion StarShoot Solar System Color Imager II exposures through a Coronado Ca K (70mm, f/5.7, 0.22nm bandpass centered at 393.4nm) solar telescope and wavelet processed by F. Ringwald.
|  The Helios-1 solar telescope, 2008 April 19, with the Central Valley Astronomers during Vintage Days at Fresno State, snapshot by F. Ringwald.
|  The Sun in CaK, 2008 April 19, with the Central Valley Astronomers during Vintage Days at Fresno State, full-color Registax stack of 31 (out of 168) x 1/15-s Orion StarShoot Solar System Color Imager II exposures through a Coronado Ca K (70mm, f/5.7, 0.22nm bandpass centered at 393.4nm) solar telescope and wavelet processed (at 20%/30%) by F. Ringwald. |
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Last updated 2008 April 20. Web page by Dr. Ringwald ( ringwald@csufresno.edu )
Department of Physics, California State University, Fresno. Please read this disclaimer.