I don't think this has been posted before. But my friend Bob Murphy, a retired "rocket scientist" (really), shared this Mars image taken by himself. He writes in part:
- The images shot at the Coudé focus have wonderful plate scale, but the seeing is awful. It was much better at the Cassegrain focus, but the plate scale was such that the photographic grain was an issue.
- Here is a Mars image from 1971, also taken at the Coudé focus of the 2.2 meter telescope. It's pretty awful, but that was as good as it got for all but the most persistent observers. I don’t have the exposure info handy on this, but it was probably Ekachrome with ASA of 100 or 200 and about 1 second in duration. We had moments at the Cassegrain focus (f/10) where the seeing was much better than this, so I have seen it in wonderful detail … for a few moments.
Bob worked with the newly minted 2.2 meter telescope on Mauna Kea, Hawaii as a young man. He is still going strong in various forms of photography. This is his website:
Here's his Mars photo dated 1971 August 2, 88-inch (2.2 meters) aperture, f/33:
Here's a link to a Saturn photograph made by Bob Murphy under similar circumstances:
It is really amazing what those in the film era were able to accomplish. We've got it much easier now. What could a commonplace ZWO planetary video camera accomplish if used on the 2.2 meter telescope at nearly 14,000 ft (4200 meters) elevation? Enjoy!
Edited by Rustler46, 03 December 2019 - 04:55 AM.