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National Geographic AC 70/400 AR-App Telescope
Smartphone-assisted navigation distinguishes the National Geographic AC 70/400 AR-App Telescope, which combines a 70mm refractor with 400mm focal length and an augmented-reality phone interface.
- 70mm aperture provides 1.65-arcsecond resolution
- 400mm focal length uses f/5.7 optics
- Smartphone bracket supports app-guided navigation
- 20x and 67x eyepieces included
- Panhandle mount and tripod included
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Description
Smartphone-assisted sky identification defines the National Geographic AC 70/400 AR-App Telescope, an achromatic refractor with a 70 mm aperture, 400 mm focal length, and listed f/5.7 optical ratio. Its manual alt-azimuth panhandle mount, smartphone adapter bracket, built-in compass, K20 and K6 eyepieces, 90-degree diagonal, red dot finder, aluminum tripod, and accessory system support app-guided lunar, planetary, star-cluster, and terrestrial observation.
The manual mount uses direct positioning rather than motorized tracking, while the smartphone holder supports digital reference and target identification through a compatible application. The 400 mm focal length provides a compact wide-field configuration, and the optical tube, phone adapter, focuser, diagonal, tripod, and eyepieces should be protected from dust, moisture, impact, and excessive pressure during setup and travel.
Key Features of National Geographic AC 70/400 AR-App Telescope
This manual refractor combines a 70 mm aperture with a 400 mm focal length, f/5.7 optical ratio, alt-azimuth panhandle mount, smartphone adapter bracket, compass, K20 and K6 eyepieces, 90-degree diagonal, red dot finder, and aluminum tripod.
- 70 mm achromatic refractor
- 400 mm focal length with listed f/5.7 optical ratio
- Manual alt-azimuth panhandle mount
- Smartphone adapter bracket
- Built-in compass
- K20 and K6 eyepieces
- 90-degree diagonal mirror
- Red dot finder and aluminum tripod
App-Assisted Manual Sky Identification
The supplied application focuses on smartphone-assisted identification and manual observation of the Moon, planets, bright clusters, landscapes, and other suitable targets, with the 400 mm focal length providing broad framing while the user moves the mount by hand and uses the smartphone bracket and compass for orientation support.
Why Choose National Geographic AC 70/400 AR-App Telescope
This model is relevant when a simple manual telescope should work alongside a smartphone for orientation and target reference, because it combines a compact 70 mm refractor with a compass, phone adapter, upright diagonal, two eyepieces, finder, tripod, and panhandle control without motorized tracking.
- Compact 400 mm focal length for broad framing
- Smartphone adapter and compass for assisted orientation
- Eyepieces, finder, diagonal, tripod, and manual mount included
National Geographic 2-Year Limited Warranty
The supplied product information lists a 2-year limited warranty for this telescope, and the applicable US warranty terms, smartphone accessory coverage, optical coverage, tripod coverage, registration requirements, and authorized service process should be confirmed through the current National Geographic or Bresser distribution channel before purchase.
National Geographic AC 70/400 AR-App Telescope Specs
| Brand | National Geographic |
| Full Model Code | National Geographic 70/400 Alt-Azimuth Refractor Telescope with Augmented Reality App Interface (9071000) |
| Country of Origin | China |
| Optical Design | Achromatic Refractor (Two-Element Crown-Flint Lens Configuration) |
| Aperture | 70 mm (2.76 inches) |
| Focal Length | 400 mm |
| Focal Ratio | f/5.7 |
| Optical Coatings | Magnesium Fluoride Anti-Reflection Single-Layer Coating Matrix |
| Glass Material | Standard Optical Crown and Flint Glass Element Array |
| Secondary Mirror Obstruction | 0 mm (Refractor Design) |
| Secondary Mirror Obstruction by Diameter | 0% |
| Secondary Mirror Obstruction by Area | 0% |
| Resolving Power | 1.65 Arcseconds (Dawes), 1.97 Arcseconds (Rayleigh) |
| Limiting Visual Magnitude | 11.9 |
| Highest Useful Magnification | 140x |
| Lowest Useful Magnification | 10x |
| Optical Tube Material | Extruded Aluminum Cylindrical Shell with Protective Composite Edge Trim |
| Focuser Style & Mechanism | 1.25-inch Standard Drawtube Focus Housing with Polymer Rack & Pinion Track Gears |
| Mirror Lock Mechanism | No |
| Optical Tube Dimensions | 85 mm x 380 mm |
| Optical Tube Weight | 1.20 kg (2.65 lbs) - OTA Only / 2.60 kg (5.73 lbs) - Total System with Mount |
| Mount Attachment Type | Direct Yoke Mount Frame Cradle Threaded Attachment Joint |
| Finder Scope Specification | Red Dot Projection Finder Sight Array Assembly with Variable Luminance Dial Node |
| Included Accessories | 70mm Achromatic OTA, Manual Alt-Azimuth Mount with Panhandle Control, Aluminum Tripod, Smartphone Adapter Bracket, Built-in Compass, Two Eyepieces (K 20mm - 20x, K 6mm - 67x), 90-Degree Diagonal Mirror (1.25-inch) |
| Standard Warranty | 2-Year Limited Warranty |
| Application | Interactive constellation exploration and beginner sky identification, leveraging a integrated smartphone hardware cradle to cross-reference targets using real-time digital app maps. |
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