The most advanced 80mm binocular telescope. Built by you.
Stunning two-eyed views of nebulae, starfields, and our solar system, in an 8 lb binocular you assemble with our step-by-step video course. No experience needed.
From $1,199
Video course included (a $149 value)
2” eyepieces
Widest, brightest views
Merge controls
Touch up merging in the field with any eyepieces
9x-133x
From constellations to Saturn
8 lb / 3.6 kg
Lightest 80mm binocular telescope
WHY BINOCULARS
Look for hours, not seconds
Telescopes make you squint through one eye. Heart lets you relax into the view with both eyes, at a comfortable 90° angle, even when pointed straight up. It puts you in the mood to explore.
| Telescope | Heart | |
|---|---|---|
| Comfortable viewing | A few seconds | A few hours |
| Finding objects | Difficult | Easy |
| Setup time | 5–60 minutes | Under 60 seconds |
| Storage | Quite a bit | Not much |
THE VIEW
Widefield Unleashed
The same patch of sky through other 80mm binocular telescopes with 1.25″ eyepieces, and through Heart with 2″ eyepieces. See every deep space object surrounded by rich starfields (and other deep space objects!)
Other 80mm binoculars · 1.25″ eyepieces
Heart · 2″ eyepieces
Batch 12 · closes November 8
Choose your kit
Every kit includes the video course, optics, and hardware. Pick whether we print the parts or you do.
Self-Print Kit
Print the parts yourself in PETG (~2 kg)
$1,199
- Video instruction course
- Optics kit
- Aluminum frame
- Hardware & extras kits
- 3D-printed parts (you print)
Full Kit · Rose / Teal
Every part printed by us, ready to assemble
$1,599
- Video instruction course
- Optics kit
- Aluminum frame
- Hardware & extras kits
- All 3D-printed parts + Batch 12 upgrades
Full Kit · Black / Gray
Every part printed by us, ready to assemble
$1,599
- Video instruction course
- Optics kit
- Aluminum frame
- Hardware & extras kits
- All 3D-printed parts + Batch 12 upgrades
You'll also need 2″ or 1.25″ eyepieces and a tripod. Not sure which? The course covers it.
Want just the plans? We have that too. The course comes with a full list of hardware, .STL files, and .DXF files for laser cutting the metal frame. The metal frame is all 1/8” aluminum except the tapped and countersunk 1/4” mount plate you can order separately.
THE BUILD
Yes, you can build this
Lifetime access to our video course walks you through every step, from gathering tools to aligning the optics for your eyes. Watch the first lesson free before you buy.
✓ No special skills: follow the video, turn a screwdriver
✓ You'll know how to clean, adjust and upgrade it
✓ New parts released as the community improves them
REVIEWS
What builders say
Independent review · YouTube
“The moment those two images snapped together was so satisfying!”
The Space Koala built a Heart, then took it under dark skies with eyepieces, UHC filters and GoTo.
Watch on YouTube →Analog Sky provided the kit free of charge.
BUILT FOR ASTRONOMY
Every detail is designed for the night by fellow stargazers
Deep, dark contrast
Microbaffled from dew shield to eyepiece, with 99%+ BBAR-coated lenses.
Maintain it yourself
Quick thumbscrew access to optical surfaces
Fits your eyes
Two merge knobs line up the view for any eyes or eyepieces, right in the field.
Mount it your way
Bottom mount for fluid heads, side mount for astro saddles, plus hardpoint grids for any accessory.
2 second eyepiece and filter swaps
Magnetic filter cartridges and click-in eyepiece adapters. Any eyepiece aligns perfectly.
Aperture masking for crisp solar system views
Hinged lens caps include quick f/8 aperture masks for sharper views of the Moon and planets.
UPGRADES
Make it yours
Embedded PiFinder™
A camera and plate solving work out exactly where Heart is pointed, then guide you to your next target. Over a dozen deep-sky catalogs, or import your own lists from planetarium software.
- 80% larger screen for easier reading
- Bigger battery lasts all night
- Joystick for faster menus
From $499.99
See PiFinder details
Green laser module
Heart has a built-in laser mount. This safe <5mW module points exactly where you're aimed.
$35
View add-on →Tech specs
| Objective lenses | 80mm achromatic, BBAR coated |
|---|---|
| Focal length | 400mm (f/5) |
| Weight | 8 lb (3.6 kg) |
| Zoom range | 9x to 133x (46mm to 3mm eyepieces) |
| Widest view | 6° at 11x (36mm 72° eyepiece, 7.2mm exit pupil) |
| Zoomed view | 0.75° at 80x (5mm 60° eyepiece, 1mm exit pupil) |
| Image orientation | Horizontally flipped |
| Filters | Any standard 2″ or 1.25″ filter |
| Optics | 96%+ mirror coatings, BBAR lens coatings, blackened lens edges |
| Mounting | Bottom mount for fluid heads, side mount for astro saddles; accessory hardpoint grids |
| Self-print requirements | 7″/175mm print bed (Prusa MINI, Bambu A1 Mini); PETG at 235–260 °C nozzle, 70+ °C heated bed |
What's new in Batch 12
Full Kits include every part below. Self-Print Kits include the metal tailgates.
- IPD lock clutch Holds your IPD setting, or makes it easier or harder to change
- Lens caps, one 50mm mask Fewer parts to keep track of
- Lens caps, no mask Nothing extra to keep track of
- Short UTA lens hood 2″ shorter, for packing in hard cases
- Updated focuser drawtubes Smoother, more precise focusing and easier eyepiece swaps
- Plastic carry handle More comfortable carrying
- Filter garages Keep a pair of filters close at hand
- Focuser cap Both caps joined, so neither goes missing
- Updated handle Stronger horizontal piece to prevent breakage
- Eyepiece adapters Now with a −10mm inset
- Metal tailgates Longer life and more predictable motion All kits
- Recessed laser button cover Prevents accidental firing
Questions
Do I need a 3D printer?
Only for the Self-Print Kit. You'll need a printer with at least a 7″/175mm bed (a Prusa MINI or Bambu A1 Mini works) that prints PETG, and about 2 kg of filament. Full Kits include every printed part.
What's the difference between the kits?
Every kit has the same optics, aluminum frame, hardware and video course. With the Self-Print Kit you print the plastic parts yourself. Full Kits come with every part printed by us in Rose/Teal or Black/Gray, plus all the Batch 12 upgrades.
What else do I need?
A pair of 2″ or 1.25″ eyepieces and a tripod. At 8 lb, Heart works with less expensive tripods. Not sure which to get? The course covers it.
How long does the build take?
An organized, dedicated person could do it in a weekend. It takes most people 1-2 weeks.
When will my kit ship?
Batch 12 is planned to ship from December 15, in the order preorders were received.
Can I upgrade it later?
Yes. New parts are released as the community tests and improves them, and you can add better optics as they become available and your budget allows.
Batch 12 closes November 8
Reserve your Heart now and start building in December