Optical SystemOptical Design Corrected Dall-Kirkham (CDK)
Aperture 700 mm (27.56 inch)
Focal Length 4638 mm
Focal ratio f/6.6
Central Obstruction 42% of the Primary Mirror Diameter
Back Focus 305 mm (12 inch) from Mounting Surface
Focus Position Nasmyth Focus
Usable Field of View 70 mm (0.86 degrees)
Fully Baffled Field 60 mm
Image Scale 22 microns per arcsecond

 一下是介绍视频

  性能貌似还是挺有吸引力的，不过十八万美元的价格也足够吓死人了。