To get a closer look, I got out my Russian MTO 11CA, which is a 1000mm f10 mirror lens originally built for the Soviet military in the Cold War period. It is built like the proverbial tank and reasonably sharp for such modestly priced lens. I hooked it up to my Panasonic GF-1 via an M42 to micro 4/3 adapter. This gives an equivalent focal length of an enormous 2000mm!
|MTO 11CA 1000mm f10 Mirror Lens|
Pointing the combo at Jupiter showed a clear view of the four brightest moons:
|Jupiter's 4 brightest moons|
Unfortunately, there is no surface detail visible on Jupiter and the whole image is lacking in sharpness. This was mainly due to difficulties in keeping the lens still, as it is a light lens with a long focal length, making it susceptible to the slightest vibration. It doesn't help that the tripod mount is a rather weak and shallow affair and the night air was also not particularly still, due to the very warm weather. Still, amazing what you can see without a telescope...