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 - 1020'
·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 SiO2protected
Delivery Set: Optical Tube Assembly, 10x50 finder with Finder Bracket, Piggy-back camera mount, 2" 1/10th wavefront surface star diagonal (SCT fit), 1.25" 2.4x Barlow lens, 1.25" 12 mm or 21 mm Erfle eyepiece, soft carrying case.
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前提是我中奖。。
好东西都想拥有
看到毒物了