Officina Stellare Supremo 250 Maksutov Cassegrain Telescope
Officina Stellare uses primarily aluminum and carbon fibers when manufacturing their telescopes. The Supremo 250 Maksutov Cassegrain by Officina Stellare is equipped with this material that is tolerant of thermal and mechanical conditions and therefore makes it very environmentaly friendly while still making the telescope secure. These two elements also provide a powerful telescope with a reduced weight for easier moving.
All the mechanical parts for the the OTA Maksutov Cassegrain Supremo 250 are machined using CNC computer assisted machines and from a whole block of aluminum to guarantee the best possible precision. Also the carbon fiber components are produced following strict specification and tolerances. Each part has been computer designed and optimized for the best structural performance, rigidity and lightness. The holding systems for both mirrors, the spider, rings and all the structural components, even the smallest, are CNC machined from a single block of special aluminum (6061/7075, Ergal and Anticorodal), stainless steel, titanium and brass. The tubes are made of true carbon-graphite fiber obtained with the use of high vacuum process, allowing us to obtain the best stability of the focus vs temperature changes still maintaining the best structural rigidity and lightness.
Great care is being ensured by Officina Stellare in constructing the rear holding cell of the primary mirror. The entire rear cell for the primary mirror is figured to have the best rigidity/weight ratio and for the fastest possible thermal stabilization between the environment and mirror. The Supremo Cassegrain Maksutov telescope has amazing and remarkable convection and thermal irradiation which improved with the use of three high quality axial fans in the back of the cell.
Officina Stellare has focused tremendous efforts to simplify and redistribute the collimation between the mirrors resulting in a stable, efficient, and simple system. Collimation is achieved by acting on three aspects alone (the minimum required points to generate a single plane) using a special, great diameter preloaded bolts (one for each point). This results in a single hand use, in which the observor can simply rotate the bolt left or right to move the mirror back and forth (no more complicated operations using push pull screws and locks) in a very intuitive and efficient way. Officina Stellare has just made the process one step easier and faster. The mirror borders uses an opaque, circular mask to avoid undesired light scattering which always assists in accurate and magnificient CCD imaging. The light shields for the primary and secondary mirrors are computer designed and optimized to ensure complete illumination of the field still maintaining a complete protection from stray light. Inside the light shields in the Supremo cassegrain, there are also micro baffles that reduces, coupled with an opaque painting of the surfaces, to nearly zero any possible parasite stray light. In some instances and for certain telescopic models, the light shield for the secondary mirror is composed using a special layout that maintains the efficiency of the system while reducing the obstruction. The back plate of Officina Stellare's Supremo telescope comes standard with a system for adjusting the planarity of the focal plane in order to compensate for any small misalignment in the imaging train, always unwanted and annoying specially on today’s large CCD cameras.
The Officina Stellare Supremo 250 Modified Maksutov Cassegrain (RuMak) Telescope has a clear aperture of 250mm and operates at a focal length of 3125mm with an f/12.5 focal ratio. Its mirror system features quartz optical glass and an interferometric report (at least 1/10 lambda) can be provided for each and every telescope. The over all length of the Officina Stellare Supremo 250 optical tube assembly is 785mm (slightly under 31 inches) and its over all average weight is 22 kg or about 48.5 pounds with an average tube diameter of 330mm - or just around 13 inches.
The above picture is the Supremo 250 Maksutov-Cassegrain Telescope in the optional Aluminum 250mm Telescope Case by Officina Stellare which can be purchased separately. It is highly recommend due to its ability to block and regulate moisture. Moisture is never good for optics, and for a magnficient telescope like this, protecting the high quality optics is a good idea.
Officina Stellare Product Number: SUPREMO250
Officina Stellare Supremo Telescopes are excellent designs of the Maksutov-Cassegrain optical tube.