OCAL H-2 Newtonian 206mm F2.72 Astrograph
OCAL H-2 is a Newtonian reflecting astronomical telescope developed specifically for astronomical photography. Its model is H-206, with a primary mirror aperture of 206mm and a focal ratio of F2.72. A focal length of about 560mm can cover the shooting of most celestial bodies and present the fine details of celestial bodies.
To achieve excellent optical performance at a small focal ratio, it has been carefully designed in both optical and mechanical aspects. With an excellent optical system design, and strict detection by optical equipment such as interferometers and eccentric meters, the quality of the lenses is ensured to be top - notch. The mechanical positioning design of the main mirror, the precise fine - tuning design of the secondary mirror, the focusing base design, and the micro - heating dew removal design of the optical system comprehensively guarantee the shooting effect.
When you purchase the OCAL H - 2you will get a complete set of equipment: One set of telescope main body, including components such as a Telescope Tube clamp, dovetail plate, focuser, and correctors.
One copy of a simple product introduction. OCAL anti - dew system. Several screwdrivers and hex wrenches for telescope adjustment. Several data cables and DC wires. One matching aluminum case with wheels.
Fused Silica Glass Substrate
Large-diameter correctors and dedicated 2.5-inch focusing base support full-frame shooting
Dehumidification device prevents condensation on the lens by real-time detection of temperature and humidity
Secondary mirror precision adjustment structure
Primary mirror Position Fixing and Primary mirror Adjustment Screws
Markings on the Primary Mirror and Secondary Mirror
Professional Production and Detection Equipment
Parameters: Camera 2600MC, single exposure 300S, Environment: Class 4 light pollution
Technical Specifications
| Item |
Parameter |
| Model |
OCALH-2 |
| Focal Length |
560 mm |
| Aperture – Focal Ratio |
D: 206 mm, F2.72 |
| Minor Axis of Secondary Mirror |
80 mm |
| Good Image Area |
44 mm full-frame |
| Substrate Material of Primary and Secondary Mirrors |
Fused silica glass |
| Shapes of Primary and Secondary Mirrors |
Hyperboloid, Plane |
| Correcting Lens |
4-element apochromatic lenses, one of which is super ED glass. The clear aperture is 56 mm, with M48×0.75 and M54×0.75 adapter rings attached. The back-focus distance is 55 mm |
| Focuser |
2.5-inch dual-speed focusing base, connected to the correcting lens by threads integrated with a dedicated bearing rotator (CAA) and an angle scale. It rotates smoothly without resistance and is equipped with a focal-plane adjustment device |
| Telescope Body Material |
Carbon fiber, 4 mm thick |
| Inner Wall of Telescope Tube |
Coated with special anti-reflection paint from German Noctutec |
| Clamping Hoop |
Made of aluminum alloy by CNC cutting, 10 mm thick, 22 mm wide, with an inner diameter of 254 mm and 10 groups of M6 threaded assembly holes |
| Dimensions |
Length 630 mm, tube diameter 254 mm, maximum distance between the two dovetail plates 340 mm |
| Weight |
Bare weight of the complete telescope set is 12.7 kg |
| Visual Accessories |
Not configured |
In the Box
- OCAL H-2 Newtonian 206mm F2.72 Astrograph
Manual & Warranty
OCAL's warranty
User Manual
