- Fast, wide-field 11” f/2.2 optical design with rare-earth glass for images free of false color, coma, and field curvature
- Large 43.3mm optimized image circle maintains pinpoint stars to the far corners of even the largest astroimaging sensors, while the usable field extends even further to 52mm for larger format sensors
- New Ultra-Stable Focus System (USFS) minimizes focus shift and mirror flop
- Integrated air-cooling system features a quiet, high-output 12V MagLev fan and vents with mesh filters to prevent dust ingress
- Common camera adapters (T-thread and M48) included for easy attachment to popular CCD and DSLR cameras
RASA 11 inch V2 - Rowe-Ackermann Schmidt Astrograph
₹491,000.00Price
Sales Tax Included
Optical Design: Rowe-Ackermann Schmidt Astrograph Aperture: 279mm (11") Focal Length: 620mm (24.4") Focal Ratio: f/2.2 Central obstruction diameter: 114mm (4.48") (41% of aperture diameter) Light Gathering Power (Compared to human eye): 1588x Resolution (Rayleigh): 0.49 arc seconds Resolution (Dawes): 0.41 arc seconds Image Circle: 43.3mm (1.7") Ø , 4.0° Useable field: 52mm (2.04") Ø , 4.8° only minimal performance loss at edge of FOV Wavelength range: 400 - 700 nm Spot size: < 4.4 μm RMS across FOV Optical Coatings: StarBright XLT Off-axis Illumination: 83% at 21mm (0.82") off-axis Optical Window: 68mm (2.67") Ø Back focus with included camera adapter: 55mm (2.16") Back focus from top of threaded collar: 72.8mm (2.86") Optical Tube: Aluminum Optical Tube Length: 838.2mm (33") Optical Tube Diameter: 330.2mm (13") Focuser: Ultra-Stable Focus System Finderscope: Not included Optical Tube Weight: 43 lbs (19.5 kg) Other Features: Ventilation fan, dual dovetail mounting bars Included items: 42mm (1.65") T-thread camera adapter | 48mm (1.89") camera adapter | Dust cover | Fan battery pack Dovetail: CGE Dovetail Bar Solar Warning - Never look directly at the Sun with the naked eye or with an optic (unless you have the proper solar filter). Permanent and irreversible eye damage may result.
- Never use your optic to project an image of the Sun onto any surface. Internal heat build-up can damage the optic and any accessories attached to it.
- Never leave your optic unsupervised. Make sure an adult who is familiar with the correct operating procedures is with your optic at all times, especially when children are present.