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More on the way:
This product will not ship immediately. Contact us for estimated delivery.
Optical Tube Info: | |
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Optical Design | Rowe-Ackermann Schmidt Astrograph |
Aperture | 203mm (8") |
Focal Length | 400mm (15.74") |
Focal Ratio | f/2.0 |
Central obstruction diameter | 93mm (3.66") (46% of aperture diameter) |
Light Gathering Power (Compared to human eye) | 843x |
Resolution (Rayleigh) | 0.68 arc seconds |
Resolution (Dawes) | 0.57 arc seconds |
Image Circle | 22mm (.86") Ø, 3.15° |
Useable field | 32mm (1.26") Ø, 4.6°, only minimal performance loss at edge of FOV |
Wavelength range | 390 - 800 nm |
Spot size | < 4.6 μm RMS across image circle |
Optical Coatings | StarBright XLT |
Off-axis Illumination | 93% at 11mm (.43") off-axis |
Optical Window | 46mm (1.81") Ø |
Back focus with included camera adapter | 25mm (.98") |
Back focus from top of threaded collar | 29mm (1.14") |
Optical Tube | Aluminum |
Optical Tube Length | 628mm (24.7") length | 235mm (9.3") diameter |
Focuser | Ultra-Stable Focusing System |
Finderscope | Not included |
Optical Tube Weight | 17 lbs (7.7 kg) |
Other Features | Air-cooling system, integrated filter mount |
Included items | M42 camera adapter, C-thread camera adapter, fan battery pack |
Dovetail | CGE Dovetail Bar |