Updated June 10, 2012.
Each photo is described in detail, including exposures, equipment used, dates, and processing.
All of the 2000-2003 images used a 10" Newtonian telescope with the AO-2 to project the image to the SBIG ST-7 camera and CFW-8 filter wheel. The effective focal length is 14.1 m, giving a plate scale of about 7.6 pixels per arcsecond (3.8 pixels/arcsec in 2x binned mode). This is slightly over F/60, so even the central core of the Airy disk is spread over 4 pixels.
For Mars, starting in 2003, a Philips ToUcam webcam is used at F/33 to get some great images. Focusing is easier, and the noise level on raw frames is much less than I expected. Automatic selection of the best 100 frames, and automatic registration, seems very good. I tested the ToUcam to measure its actual exposure time, linearity, and spectral response.
Starting 2005, a 16 in telescope is used.
The narrative for each image is variable - I'm treating this website as my long-term notebook. Things that went well, as well as things that went wrong, and changes to my telescope or techniques are all included in the following pages and images.
- high resolution images and short movies
- a seven-hour rotating Jupiter movie in three downloadable sizes
- fantastic S-L9 film images
- high resolution images showing a hint of the Enke division in a color image
- a movie showing 4 moons revolving around Saturn
- ringless Saturn images
- the "cave" region in Copernicus
- a movie showing turbulence over a typical image.
Mars - the 2001 global dust storm, 2003 images with a webcam and 2005 images with a 16" telescope
Uranus - and 4 of its moons - less than 4 arcsec diameter, but it shows a resolved disk, with moons.
- 2012 solar transit with a point-and-shoot camera
- showing phase changes and some hints of cloud features.
- showing its colorful side
due to Earth's atmospheric refraction
- M13's core
- close double stars
- images of stars at F/60 for near diffraction-limited resolution.
- diffraction rings from 8" and 4" apertures
- Orion's Trapezium.
(For best viewing, please maximize your monitor brightness and adjust the contrast until you can see each of the 17 gray scales shown here)
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