1. ഓവർview കൂടാതെ പ്രധാന സവിശേഷതകൾ
The Celestron EdgeHD 925 is a 9.25-inch aperture optical tube assembly (OTA) designed for advanced astronomical observation and astrophotography. It features an aplanatic Schmidt-Cassegrain optical design, providing aberration-free images across a wide visual and photographic field. This design ensures sharp stars across large CCD chips, making it suitable for high-resolution imaging.
പ്രധാന സവിശേഷതകൾ:
- മികച്ച റെസലൂഷൻ: Aplanatic Schmidt-Cassegrain design delivers edge-to-edge clarity and eliminates field curvature.
- Maximized Light Transmission: Features StarBright XLT coatings on its 9.25" aperture for bright, high-contrast images.
- Versatile Eyepiece Options: Includes a 2" Luminos 23mm eyepiece and a 1.25" reducer adapter for various magnifications.
- കൃത്യതയുള്ള വിന്യാസം: Comes with a 9x50 finderscope for efficient object location.
- എളുപ്പമുള്ള മൗണ്ടിംഗ്: Equipped with a CGE dovetail plate for stable attachment to compatible mounts.
- വിപുലമായ ഡിസൈൻ: Flexible tension clutches reduce mirror shift, and cooling vents release hot air from behind the primary mirror.
2. Components of the Optical Tube Assembly
The EdgeHD 925 Optical Tube Assembly (OTA) consists of several key components that work together to provide high-quality astronomical viewകളും ചിത്രങ്ങളും.
ചിത്രം 2.1: മുൻഭാഗം view of the Celestron EdgeHD 925 OTA, showing the corrector plate and the main optical tube.
ചിത്രം 2.2: വശം view illustrating the attached 9x50 finderscope and the focuser with an eyepiece and diagonal.
- ഒപ്റ്റിക്കൽ ട്യൂബ്: The main body housing the mirrors and corrector plate.
- Corrector Plate: The front glass element that corrects spherical aberration.
- പ്രാഥമിക കണ്ണാടി: Located at the rear of the tube, collects and focuses light.
- സെക്കൻഡറി മിറർ: Mounted on the inside of the corrector plate, reflects light to the focuser.
- ഫോക്കസർ: Mechanism for adjusting the focus of the image.
- Dovetail Plate (CGE): A rail on the bottom of the OTA for attaching it to a compatible telescope mount.
- ഫൈൻഡർസ്കോപ്പ്: A small, low-power telescope (9x50) used for locating objects in the sky.
- Eyepiece and Diagonal: Used for visual observation. The diagonal redirects the light path for comfortable viewing.
3. സജ്ജീകരണവും പ്രാരംഭ അസംബ്ലിയും
Proper setup of your EdgeHD 925 OTA is crucial for optimal performance. This section outlines the general steps for initial assembly.
- അൺപാക്ക് ചെയ്യുന്നു: Carefully remove all components from their packaging. Retain the original packaging for storage or transport.
- Mounting the OTA:
- Ensure your telescope mount (not included with OTA) is stable and properly set up according to its own manual.
- Align the CGE dovetail plate on the bottom of the EdgeHD 925 OTA with the saddle on your mount.
- Securely tighten the mount's clamping screws to hold the OTA firmly in place. Ensure the OTA is balanced on the mount.
- ഫൈൻഡർസ്കോപ്പ് അറ്റാച്ചുചെയ്യുന്നു:
- Slide the finderscope bracket into the dovetail base located on the main optical tube.
- Tighten the thumbscrew on the finderscope base to secure it.
- Later, you will need to align the finderscope with the main telescope.
- Installing the Diagonal and Eyepiece:
- Insert the star diagonal into the focuser. Secure it with the focuser's thumbscrews.
- Insert the desired eyepiece (e.g., the included 23mm Luminos) into the star diagonal. Secure it with the diagonal's thumbscrews.
4. Operating Your EdgeHD 925
Once assembled, your EdgeHD 925 is ready for observation. This section provides basic operational guidelines.
- ഫൈൻഡർസ്കോപ്പ് വിന്യസിക്കുന്നു:
- During daylight, point the main telescope at a distant, easily identifiable object (e.g., a telephone pole or chimney).
- Center the object in the main telescope's eyepiece.
- Adjust the alignment screws on the finderscope bracket until the same object is centered in the finderscope's crosshairs.
- ഫോക്കസിംഗ്:
- Turn the focuser knob slowly until the image in the eyepiece becomes sharp.
- For fine-tuning, turn the knob slightly past sharp focus in both directions, then return to the sharpest point.
- നിരീക്ഷിക്കുന്നു:
- Use the finderscope to locate your desired celestial object.
- Once the object is in the finderscope's field of view, look through the main telescope's eyepiece and fine-tune its position and focus.
- Experiment with different eyepieces to change magnification.
- Collimation (Optical Alignment):
- While the EdgeHD optics are designed to hold collimation well, occasional adjustment may be necessary.
- Refer to advanced guides or Celestron's official resources for detailed collimation procedures, typically involving adjusting screws on the secondary mirror holder.
5. പരിപാലനവും പരിചരണവും
Proper maintenance will ensure the longevity and performance of your EdgeHD 925 OTA.
- ക്ലീനിംഗ് ഒപ്റ്റിക്സ്:
- Dust on the corrector plate is normal and rarely affects performance. Avoid frequent cleaning.
- For significant dust, use a soft camel hair brush or compressed air (designed for optics).
- For smudges or fingerprints, use only specialized optical cleaning fluid and lens tissue. Apply fluid to the tissue, not directly to the lens. Wipe gently from the center outwards in a circular motion.
- Never touch optical surfaces with your fingers.
- സംഭരണം:
- Store the OTA in a cool, dry place, away from direct sunlight and extreme temperature fluctuations.
- Keep dust caps on the front and rear openings when not in use.
- If storing for extended periods, consider using desiccant packets to absorb moisture.
- പൊതു പരിചരണം:
- Avoid dropping or subjecting the OTA to sudden impacts.
- Do not overtighten screws, especially those on optical components.
- Allow the telescope to cool down to ambient temperature before observing for best image quality.
6. പൊതുവായ പ്രശ്നങ്ങൾ പരിഹരിക്കുന്നു
This section addresses some common issues you might encounter and their potential solutions.
| ഇഷ്യൂ | സാധ്യമായ കാരണം | പരിഹാരം |
|---|---|---|
| Blurry or Out-of-Focus Images | Incorrect focus, atmospheric turbulence, telescope not acclimated to temperature. | Adjust focuser slowly. Observe on nights with steady air. Allow telescope to cool down for 30-60 minutes. |
| Difficulty Locating Objects | Finderscope not aligned, unfamiliarity with sky. | Re-align finderscope during daylight. Use star charts or planetarium apps. Start with bright, easy-to-find objects. |
| Dew on Corrector Plate | High humidity and temperature drop. | Use a dew shield (accessory) or a dew heater strip (accessory). If dew forms, allow it to evaporate naturally or gently wipe with a clean, soft cloth after observation. |
| Stars Appear Elongated or Coma-like | Poor collimation (optical alignment). | Perform a collimation adjustment. Refer to advanced guides for detailed instructions. |
7 സ്പെസിഫിക്കേഷനുകൾ
Detailed specifications for the Celestron EdgeHD 925 Optical Tube Assembly (Model 91040-XLT).
| സ്പെസിഫിക്കേഷൻ | മൂല്യം |
|---|---|
| ഉൽപ്പന്ന അളവുകൾ | 22.01 x 10.63 x 10.63 ഇഞ്ച് |
| ഇനത്തിൻ്റെ ഭാരം | 36.1 പൗണ്ട് |
| ASIN | B003P93YLK |
| ഇനത്തിൻ്റെ മോഡൽ നമ്പർ | 91040-എക്സ്എൽടി |
| ബ്രാൻഡ് | സെലെസ്ട്രോൺ |
| മോഡലിൻ്റെ പേര് | EdgeHD 9.25 |
| ഒപ്റ്റിക്കൽ ട്യൂബ് നീളം | 70 Millimeters (Note: This seems to be an error in source data, likely referring to a different spec or a misinterpretation. The aperture is 9.25 inches / 235mm) |
| ഐ പീസ് ലെൻസ് വിവരണം | Barlow (Note: The product description mentions a 2" Luminos 23mm eyepiece and a 1.25" reducer adapter, not just Barlow) |
| ഒബ്ജക്റ്റീവ് ലെൻസ് വ്യാസം | 70 Millimeters (Note: This is inconsistent with 9.25" aperture. 9.25 inches is approximately 235mm. This value might refer to the finderscope objective.) |
| ടെലിസ്കോപ്പ് മൗണ്ട് വിവരണം | Equatorial Mount (Note: This OTA is compatible with various mounts, including equatorial) |
| ഫോക്കസ് തരം | മാനുവൽ ഫോക്കസ് |
| പവർ ഉറവിടം | Solar Powered (Note: This is highly unlikely for a telescope OTA. This might be an error in the source data or refer to an accessory.) |
| ഫൈൻഡർസ്കോപ്പ് | Reflex (Note: Product features mention 9x50 finderscope, which is an optical finderscope, not typically a reflex sight. There might be a discrepancy in the source data.) |
| നിർമ്മാതാവ് | സെലെസ്ട്രോൺ ഇന്റർനാഷണൽ |
| ആദ്യ തീയതി ലഭ്യമാണ് | നവംബർ 1, 2003 |
Note: Some specifications provided by the source may contain discrepancies or refer to general categories rather than specific product details. Always refer to the official manufacturer's documentation for the most accurate and up-to-date information.
8. വാറൻ്റിയും പിന്തുണയും
For detailed warranty information, product registration, and technical support, please refer to the official Celestron webസൈറ്റ് അല്ലെങ്കിൽ അവരുടെ ഉപഭോക്തൃ സേവന വിഭാഗവുമായി ബന്ധപ്പെടുക.
You can find more information and support resources by visiting the official Celestron store:
Visit the Celestron Store on Amazon
Always ensure you are consulting official Celestron channels for the most accurate and up-to-date support information.
