The world’s most advanced 80mm binocular telescope
Massive, Bright, Comfortable Two-Eyed Views
Other 80mm Binocular Telescopes with 1.25” Eyepieces
Heart with 2” Eyepieces
Light Path
💜 2” Focusers for the widest, brightest views
100% Illuminated 45mm field stop
User Experience
💜 Field Collimation
Adjust the view for any eyes or any eyepieces with two easy merge knobs
💜 Align Any Eyepiece
Every eyepiece is compatible, no matter the focal point or undercut. Perfect alignment with drawtube gripfins
💜 Room for Accessories
Accessory hardpoint grids allow attachment of any accessory
💜 Field Optics Cleaning
Easily access both objectives and diagonal mirrors with a single thumbscrew
💜 Premium Optical Coatings
BBAR and dielectric coatings for 99%+ light transmission
💜 2-Second Filter Changes
Use 2” or 1.25” filter cartridges to bring out more detail
💜 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
Owner/Maker Experience
💜 Constant Improvement
Download and print new components as they are tested and improved by the community
💜 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
💜 2-Second Eyepiece Changes
1.25” eyepiece adapters make changes fast and secure
💜 Ultralight
8 lbs (3.6 kg), the world’s lightest 80mm binocular telescope. Works well with less-expensive tripods
💜 Multiple Mounting Options
Bottom-mount for fluid heads, side-mount for astro saddles
💜 Upgrade at Anytime
Upgrade optics as they become available and as your budget allows
Watch our full feature comparison between Heart and other 80mm binocular telescopes
Wonder what the build course is like? Here’s the first lesson.
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 with BBAR coating |
| 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 coatings, BBAR coatings, blackened lens edge standard |
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)