Deepen your love for the night sky
What makes the world’s most advanced 80mm binocular telescope?
💜 2” Focusers for the widest, brightest views
100% Illuminated 45mm field stop
💜 Use Any Eyepiece
Every eyepiece is compatible, no matter the focal point or undercut
💜 2-Second Eyepiece Changes
1.25” eyepiece adapters make changes fast and secure
💜 2-Second Filter Changes
Use 2” or 1.25” filter cartridges to bring out more detail
💜 Pure Darkness Micro Baffling
The entire optical path is microbaffled from the dew shields to the eyepiece for superior contrast that outperforms paint and flocking
💜 Ultralight
Under 8 lbs (3.6 kg), the world’s lightest 80mm binocular telescope
💜 Multiple Mounting Options
Bottom-mount for fluid heads, side-mount for astro saddles
💜 Configurable Accessories
Accessory hardpoint grids allow attachment of any accessory
💜 Field Collimation
Adjust the view for any eyes or any eyepieces with two easy merge knobs
💜 Field Optics Cleaning
Easily access both objectives and diagonal mirrors with a single thumbscrew
💜 Premium Optical Coatings
Upgrade optics available for 99%+ light transmission
💜 Built-in Laser Pointer
Safe <5mW green laser pointer instantly points your way
💜 Built-in Aperture Masks
Hinged lens caps have built-in aperture masks for f/6, f/7, and f/8
💜 Constant Improvement
Download and print new components as they are tested and improved by the community
💜 Upgrade at Anytime
Upgrade optics as they become available and as your budget allows
WHY THE STRANGE SHAPE?
Heart’s stacked over-under design allows us to push the 80mm lenses close together for human eye spacing without resorting to prisms. By using mirrors instead of prisms, Heart is a fraction of the price and allows full use of 2” eyepieces that even the most expensive prism-based binocular telescopes can’t match.
Heart allows eye spacing from 58mm to 78mm, enough range for virtually anyone-young or old-to enjoy the view.
Binoculars vs. Telescopes
| Telescope | Binoculars | |
|---|---|---|
| How long is it comfortable to look through? | a few seconds | a few hours |
| How easy is it to find things? | difficult | easy |
| How much space does it take up? | quite a bit | not much |
| How easy is it to handle? | awkward | easy |
| How long does it take to setup? | 5-60 minutes | < 60 seconds |
Tech Specs
| Objective Lens | 80mm achromatic (BBAR coating available) |
| Focal Length | 400mm (f/5) |
| Image Orientation | Horizontal flip |
| Dimensions | |
| Weight | <8 pounds (3.6kg) |
| Zoom Range | 9x to 133x (46mm to 3mm eyepiece) |
| Ultra Wide Field of View | 6º at 11x (36mm/72 degree eyepiece at 7.2mm exit pupil) |
| Zoomed Field of View | 0.75º at 80x (5mm/60 degree eyepiece at 1mm exit pupil) |
| Filters | Any standard 2" or 1.25" filter |
| Optics | Dielectric and BBAR coatings available, blackened lens edge available |
Self-Print 3D Printing Requirements
Minimum print bed 7”/175mm (Prusa MINI or Bambu A1 Mini)
PETG Filament (235-260 C nozzle, 70+ C heated bed)