7" F/10 Maksutov-Cassegrain optical system with moving primary focusing. Optical quality to minimum 1/6th wave front error. Meniscus lens is multi-coated. Internal knife-edge baffle rings. Passive cooling system around meniscus. Rear mounted cooling fan with variable speed controller. Rear cell is fitted with 2" threaded opening to accept any SCT accessory. Cream-white painted tube. Accepts both Intes-Micro and STF (Mirage) telecompressors of 0.8x, 0.6x and 0.45x.
Excellent for serious imaging and visual use as well as an excellent photographic tool.
Specifications:- Clear Aperture - 178 mm
- Focal length - 1780 + 100 mm
- Focal ratio - F/10
- Back Focus - 30 - 250 mm
- Photographic field of View - 10 20'
- Tube diameter - 220 mm
- Tube length - 495 mm
- Tube weight - 5.7 kg
- Max. useful magnification - 2x per mm aperture
- Reflectitivity of mirrors - 95%
- Central obstruction - 32%
- Optical quality (for wave length 0.63 μm) - Minimum 1/6th wavefront error
- RMS - 0.041
- Body parts material - aluminium
Primary and secondary mirrors material - LK7, LK5 (Pyrex) with reflective aluminium coating and SiO2 protected
Delivery Set: Optical Tube Assembly, soft carrying case.
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