Introduction
The Carson Red Planet Series RP-400 is a refractor telescope designed for astronomical viewing. It features fully coated optics and a heavy-duty aluminum tripod with an equatorial mount, which helps in counteracting shaking and movements. This telescope is equipped with setting circles for precise celestial object location and comes with a 6x30mm finder scope and two high-quality eyepieces (K20mm and K9mm) for optimal viewing results. It is suitable for observing celestial bodies such as the Rings of Saturn and the Moons of Jupiter.

Image: The Carson Red Planet RP-400 Refractor Telescope, fully assembled on its tripod, positioned in a room setting.
What's in the Box
- K20mm Eyepiece
- K9mm Eyepiece
- 90-degree Corner Lens (Diagonal)
- Adjustable Aluminum Tripod
- 6x30mm Finder Scope
- Counterweight Bar with Counterweight
- Cradle Ring with Lock Knobs
- Equatorial Style Mount
Key Features
- Magnification: 50x-100x
- Aperture: 90mm
- Focal Length: 1000mm
- Finder Scope: 6x30mm for easy object location.
- Mount Type: Equatorial Style Mount for precise tracking of celestial objects.
- Optics: Superior, fully coated optics for clear images.
- Durability: Heavy-duty aluminum tripod for stability.
Setup Guide
This section provides instructions for assembling and setting up your Carson Red Planet RP-400 Refractor Telescope. Proper assembly ensures optimal performance and viewing experience.
1. Tripod and Mount Assembly
Begin by extending the legs of the aluminum tripod to a stable height. Attach the equatorial mount to the tripod head, ensuring it is securely fastened. The equatorial mount is designed to align with the Earth's rotation, allowing for easier tracking of celestial objects.

Image: The Carson Red Planet RP-400 Refractor Telescope fully assembled on its equatorial mount and tripod.
2. Attaching the Telescope Tube
Carefully place the main telescope tube into the cradle ring on the equatorial mount. Secure it using the lock knobs on the cradle ring. Ensure the tube is balanced by adjusting its position within the rings and by attaching the counterweight to the counterweight bar until the telescope is stable and easy to move.

Image: A close-up view of the front (objective lens) of the Carson Red Planet RP-400 Refractor Telescope, showing its red tube and black lens housing.
3. Installing the Finder Scope and Eyepieces
Mount the 6x30mm finder scope onto its designated bracket on the main telescope tube. Insert the 90-degree corner lens (diagonal) into the focuser tube. Then, insert either the K20mm or K9mm eyepiece into the diagonal. The K20mm eyepiece provides lower magnification and a wider field of view, useful for locating objects, while the K9mm offers higher magnification for detailed observation.

Image: A detailed view of the focuser mechanism and an inserted K20mm eyepiece on the Carson Red Planet RP-400 Refractor Telescope.
4. Aligning the Finder Scope
Before observing, align the finder scope with the main telescope. Point the main telescope at a distant, stationary object during daylight hours. Look through the main telescope's eyepiece and center the object. Then, adjust the screws on the finder scope bracket until the same object is centered in the finder scope's crosshairs. This alignment is crucial for easily locating celestial objects at night.
Setup and Usage Overview Video
For a visual guide on choosing and setting up your telescope, including details on refractor and reflector types, and different mount types, please watch the official Carson video below. This video also highlights the ability of Red Planet series telescopes to view deep space objects like the moons of Jupiter and the rings of Saturn.
Video: An overview from Carson on how to choose a telescope, covering refractor and reflector types, and different mount options like Alt-Azimuth and Equatorial mounts. It also discusses the deep space viewing capabilities of the Red Planet series.
Operating the Telescope
1. Focusing
Once an object is located in the eyepiece, turn the focuser knob slowly until the image appears sharp and clear. Fine adjustments may be needed as objects move across the sky or as atmospheric conditions change.
2. Using the Equatorial Mount for Tracking
The equatorial mount is designed to track celestial objects as they appear to move across the night sky due to Earth's rotation. After aligning the mount to the celestial pole (Polar Alignment), you only need to adjust one axis (the Right Ascension axis) to keep an object centered in your eyepiece. This is particularly useful for high-magnification viewing and astrophotography.
3. Deep Space Viewing
The RP-400 telescope is capable of deep space viewing. To observe fainter objects, ensure you are in a dark-sky location away from light pollution. Allow your eyes to adapt to the darkness for at least 20 minutes. Start with the lower magnification K20mm eyepiece to locate the object, then switch to the K9mm eyepiece for a more magnified view.
Maintenance
- Cleaning Optics: Use a soft, lint-free cloth specifically designed for optical lenses. Gently brush away any dust particles before wiping. For smudges, use a specialized optical cleaning solution applied to the cloth, not directly to the lens.
- Storage: Store the telescope in a dry, dust-free environment. Keep the dust caps on the objective lens and eyepiece holder when not in use to prevent dust accumulation.
- Handling: Always handle the telescope by the main tube or mount, avoiding direct contact with optical surfaces.
Troubleshooting
- Blurry Images: Ensure the focuser knob is adjusted correctly. Atmospheric conditions can also cause blurring; try observing on a night with stable air.
- Difficulty Locating Objects: Verify that the finder scope is properly aligned with the main telescope. Start with the lowest magnification eyepiece (K20mm) for a wider field of view.
- Image Drifts Out of View: For equatorial mounts, ensure proper polar alignment. For both mount types, use the slow-motion controls to track objects.
- Vibrations: Ensure the tripod is set up on a firm, level surface. The heavy-duty construction of the equatorial mount helps minimize vibrations.
Specifications
| Product Dimensions | 40.6 x 43.1 x 61.4 inches (61.4"D x 40.6"W x 43.1"H) |
| Item Weight | 22 pounds |
| Model Number | RP-400 |
| Brand | Carson |
| Model Name | Red Planet Series |
| Objective Lens Diameter | 90 Millimeters |
| Telescope Mount Description | Equatorial Mount |
| Focus Type | Manual Focus |
| Finderscope | 6x30mm |
| Lens Coating Description | Glass |
| Exit Pupil | 0.81 Millimeters |
Warranty and Support
Carson provides a One Year Limited Warranty for this product, covering defects in material and workmanship from the date of purchase. For additional warranty details or support, please contact Carson directly.
For further assistance or inquiries, visit the official Carson store: Carson Store on Amazon.





