The MC MTO-11 is a small 100mm/f10 Maksutov made in Russia. This telescope was initially designed as a tele objective for photographic use, but with the right adapters it is usable as telescope for visual observations. It has only a weight of 2.3 kg which makes this instrument extremely portable. I sold this instrument in the summer of 2004.
Technical data:
Diameter/Aperture: 100mm
Focal Length: 1000mm
Maksutov MC MTO-11
A review of this instrument (in German) can be found here.