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Ships within 48 hours · Estimated delivery Sep 12 - Sep 17
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Description
Levenhuk Ra 150C Cassegrain OTA (153/1836mm)Description Levenhuk Ra 150C Cassegrain OTA is a Cassegrain reflector that is perfect for observing deep sky. It features a distinguished design. The primary mirror is paraboloid and the secondary mirror is hyperboloid. Due to this, the transmitted picture has no spherical distortion across the entire field of view up to the maximum magnification. This Optical Tube Assembly (OTA) will be appealing to demanding and experienced users. The optics are
Description
Levenhuk Ra 150C Cassegrain OTA is a Cassegrain reflector that is perfect for observing deep sky. It features a distinguished design. The primary mirror is paraboloid and the secondary mirror is hyperboloid. Due to this, the transmitted picture has no spherical distortion across the entire field of view up to the maximum magnification. This Optical Tube Assembly (OTA) will be appealing to demanding and experienced users.
The optics are made of quartz glass with a silicon dioxide coating. The optical system has a reflectivity index of 92~96%. The dual-speed Crayford focuser has no backlash, so that it enables precise focus adjustments. The optical tube is made of steel, inside there is a high-quality blackening, and on the outside, there are two mounts: for the holder and for mount installation (dovetail plate). Levenhuk Ra 150C Cassegrain OTA is compatible with almost all of the modern mounts.
Please note: Mount, tripod, finder, and eyepieces are not included.
Features
- Reflector with a paraboloid and hyperboloid mirrors
- Silicon dioxide coating with a reflectivity index of 92~96%
- Full absence of spherical aberration
- Good correction of astigmatism and field curvature
- Dual-speed Crayford focuser, precise and fast adjustment of sharpness
- 8 internal knife-edge baffles
- Drawtube travel: 41mm (laser-engraved millimetre scale)
- Back focus distance: 157.2mm (from end of 2” focuser collar)
The kit includes:
- Telescope optical tube
- Finder scope base
- Dovetail plate
- 2” Extension ring
- 1” Extension ring
- Dust cover
- User manual and lifetime warranty
Specifications
Optics |
|
| Type | Reflector |
| Type of build | Cassegrain |
| Aperture (mm) | 153 |
| Focal length (mm) | 1836 |
| Aperture ratio (f/) | 12 |
| Resolving capacity | 0,90 |
| Limit value (mag) | 12,7 |
| Light gathering capacity | 480 |
| Max. useful magnification | 306 |
| Tube weight (kg) | 5 |
| tube diameter (mm) | 191 |
| Tube length (mm) | 540 |
| Tube material | Steel |
| Stray light baffles in the OTA | yes |
| Tube construction | Full tube |
Reflector |
|
| Main mirror´s construction | parabolic |
| secondary mirror design | hyperbolic |
| Secondary mirror diameter (mm) | 50 |
| Secondary mirror obstruction | 33 |
| reflectivity | 96 |
| Secondary mirror material | Quartz |
| Primary mirror - Material | Quartz |
| Adjustable | yes |
| protective layer | Quartz |
Focuser |
|
| Type of build | Crayford |
| Connection ( to eyepiece) | 2 |
| Backfocus (mm) | 157,2 |
| Gear reduction | 1:10 Fine movement |
| Adjustment range (mm) | 41 |
Mount |
|
| Type of build | OTA |
| Mounting type | no mount |
Included accessories |
|
| Finder scope | no |
| Prism rail | Vixen-Style |
| finder shoe | Vixen/Skywatcher Level |
| Eyepiece adaptor | 1,25" - 2" |
| Extension tubes | yes |
General |
|
| Series | Ra |
Area of application |
|
| Astrophotography | yes (Moon & Planets) |
| Moon & Planets | yes |
| Nature Observation | no |
| Nebulae & galaxies | yes |
| Sun | Only with Sun filter |
Recommended for |
|
| Beginners | no |
| Advanced | yes |
| Observatories | no |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy