
The most commonly-used equipment is a Nikon CoolPix 4500 digital camera afocally coupled to one of the college's 5-inch, F9.4 Burgess refractors via a 28-mm eyepiece.
These images were taken with the CoolPix/refractor combination noted above. The sky was mostly cloudy and the shots were taken through intermittent breaks in the clouds. This cloud cover (and the final game of the World Series) prevented any imaging of totality. In the fourth image you can see some darkening on the Moon's face from these clouds.
11:35 pm CDT. 1/125 sec at F2.6
Several sketches of Mars were made through the 5" scopes during the summer of
2003. Click on this thumbnail to see these sketches.
These shots were taken through a 5" refractor by hand-holding a Kodak digital camera to the eyepiece. You can see the vignetting due to not getting the camera exactly on-axis with the eyepiece. Other than cropping, these images have not been processed.
10:11 am CST 10:15 am CST 10:52 am CST
(1/125 s, f5.6, 37mm, ISO 100) (1/250 s, f5.6, 46 mm, ISO 100) (1/350 s, f5.6, 37 mm, ISO 100)
On the afternoon of Nov 8, 2006, Mercury passed across the face of the Sun. The initial stages of the transit were clouded out, but it eventually cleared. Here are some images taken with the CoolPix coupled to a 5-inch refractor.
3:40 pm CDT 3:47 pm CDT
These images were taken with the CoolPix/refractor combination noted above. The sky was very hazy and put an orange cast on the photos that was much stronger than the naked eye view. The images have been color balanced somewhat to make them appear more like the naked eye view. The moon was low in the southwest during the event, especially during totality. To record the image of totality the effect ISO was set at 800 and the shutter speed used was still 8 sec. That's why the image is so grainy. In the last two images you can see the bluish tint to the edge of Earth's umbra (toward the bottom of the Moon). This is due to ozone in the Earth's upper atmosphere.
4:14 am CDT 4:45 am CDT 4:46 am CDT 4:51 am CDT 4:53 am CDT
These images are composites of images taken of the Sun & the Moon showing the change in their apparent size due to the elliptical orbits of the Earth around the Sun (seen by the Sun photo) and the Moon around the Earth (seen by the Moon photo). These were taken with the CoolPix through a 114-mm Tasco reflector (yes, actually!) with a 900 mm focal length.
Sun Moon
May
24, 2008 This image is a stack of 7 frames using RegiStax. The
images were taken using a Pentax K100d DSLR and a 210 mm lens at F4.0.
Exposures were 20 sec at 800 ISO. The camera was piggybacked on a 10-inch
Dob on an equatorial platform. A little bit of wavelet processing was done
on the stacked image.
Last Modified December 11, 2008.