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- Medium Format Images - These images were shot on 6x7 PPF400 (unhypered) through an Astro Physics 155EDF, mounted on a Losmandy GM200. Guiding was by off-axis guidescope (an old Celestron/Vixen 80 mm) using an SBIG ST-4 autoguider. Some of the images display a fine line cutting across the image - most of these images were print scans and it looks like my scanner CCD has developed a defective pixel element.
(This was my first medium format image, through the 155EDF. Clouds prevented me from doing a decent drift alignment, so I had to go with what I could manage in about 15 minutes - the comet was sinking in the northwest. You can see some evidence of field rotation in the upper right corner. Still, I was pretty happy to have managed anything at all).
The majority of these images were shot many years ago through a Celestron C14 tube assy, mounted on a Byers 812, and guided by hand using a Lumicon Giant Easy Guider. As with the above images, some scans show a faint streak from the scanner CCD. None of these images has been digitally manipulated, they are straight scans of home-darkroom prints. Most of the photos were shot on hypered Konica SR1600 or 400 print film, at f/7 using the Lumicon reducer. (This is the rig that I used to take most of the following photos. This picture was taken at Riverside '85, and is where I took the below Trifid shot)
(This was my first autoguided,ST4, image. The trailed stars were evidence of my difficulty getting the guider to work with the long focal length of the C14. Still, the promise of autoguiding was evident).
(my second autoguided image... Still some trailing)
(my very first astrophoto, and I was hooked! - taken piggyback on a C8 from north of Houston, Texas)
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Copyright © 2007 Alpine Astronomical, LLC. All Rights Reserved.
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