Det klassiske Celestron Schmidt-Cassegrain-teleskop (SCT) har leveret til en hel generation af observatører og astrofotografer. Nu med vidvinkel- og ultra wide-field okularer, CCD-kameraer i stort format og digitale spejlreflekskameraer i fuld ramme den klassiske SCT et nyt optisk design - det design er EdgeHD.
Denne blændermodel på 11" er meget populær blandt seriøse observatører og astrofotografer, der ønsker et teleskop med stort lysindtag. Teleskopet leveres komplet med et vidvinkel 23 mm Luminos 2 ″ okular, et 2 ”spejl diagonalt og et 9 × 50 finderscope.
- Popular 11″ aperture EdgeHD Telescope
- 2800mm (f/10 focal ratio)
- Celestron’s StarBright XLT coatings provide maximum light transmission
- EdgeHD’s aplanatic, flat field Schmidt-Cassegrain optics result in pinpoint stars to the edge of today’s largest imaging sensors and widest eyepieces for best optical performance
- Aluminium optical tube with tube vents with mesh filter allows hot air to be released from behind the primary mirror for improved cooling
- Mirror support knobs hold the mirror in place and reduce image shift during imaging
- Focal ratio of f/7 with the addition of an optional focal reducer, or ultra-fast Fastar/Hyperstar f/2 imaging with a removable secondary mirror
- A 9×50 finderscope, wide-angle 23 mm Luminos 2″ eyepiece, 2” mirror diagonal included
Specifikationer:
| Optical Design | EdgeHD |
| Aperture | 279.4mm (11″) |
| Focal Length | 2800mm (110″) |
| Focal Ratio | f/10 |
| Focal Length of Eyepiece 1 | 23mm (0.91″) |
| Magnification of Eyepiece 1 | 122x |
| Finderscope | 9×50 |
| Star Diagonal | 2″ with 1.25″ adaptor |
| Optical Tube | Aluminium |
| Highest Useful Magnification | 660x |
| Lowest Useful Magnification | 40x |
| Limiting Stellar Magnitude | 14 |
| Resolution (Rayleigh) | 0.5 arc seconds |
| Resolution (Dawes) | 0.42 arc seconds |
| Light Gathering Power (Compared to human eye) | 1593x |
| Secondary Mirror Obstruction | 95mm (3.75″) |
| Secondary Mirror Obstruction by Diameter | 34% |
| Secondary Mirror Obstruction by Area | 12% |
| Optical Coatings | StarBright XLT |
| Optical Tube Length | 610mm (24″) |
| Optical Tube Diameter | 312.42mm (12.3″) |
| Optical Tube Weight | 28 lbs (13 kg) |
| Dovetail | CGE Dovetail Bar |
