To Next PageTo Next PageHow to fix blurred picture on National Geographic RT70400 Telescope?
If the picture through your National Geographic Telescope appears blurred, adjust the focus using the focus wheel until the image becomes clear.
What to do if no focus possible on National Geographic RT70400 Telescope?
If you cannot focus your National Geographic Telescope, allow time for the temperature of the telescope to balance out with the surrounding environment. This may resolve the focusing issue.
What to do if there is no picture on National Geographic Telescope?
If you're not seeing any picture through your National Geographic Telescope, make sure to remove the dust protection cap from the telescope.
Why is the image quality bad on my National Geographic Telescope?
To improve the viewing quality with your National Geographic Telescope, ensure you are not observing through any glass surfaces, such as a window. This can negatively impact image clarity.
General| Type | Refractor |
|---|---|
| Aperture | 70 mm |
| Focal Length | 400 mm |
| Focal Ratio | f/5.7 |
| Mount Type | Alt-azimuth |
| Finder Scope | 5x24 |
| Tripod Included | Yes |
| Eyepieces Included | 20mm, 10mm |
| Magnification Range | 20x |
Critical warnings about observing the sun and potential permanent eye damage.
Guidance on preventing choking hazards, proper battery use, and temperature limits.
Instructions for disposing of packaging materials and electronic waste responsibly.
Lists all the accessories and components that come with the telescope.
Detailed identification and labeling of each part of the telescope and mount.
Instructions for assembling the telescope for initial use.
Steps to align the red dot viewfinder and use it for aiming.
Guidance on basic operation, focusing, and tracking celestial objects.
Proper methods for cleaning the telescope's optical components to maintain performance.
Solutions for common problems encountered while using the telescope.
Instructions for attaching a smartphone to the eyepiece for astrophotography.
Guidance on navigating the sky and identifying celestial objects for observation.
Explanation of reflector, refractor, and catadioptric telescope designs.
Definitions of key optical terms like aperture, focal length, and eyepiece.
Understanding magnification, focal ratio, and exit pupil for telescope performance.
Overview of different eyepiece designs and the importance of eye relief.
