ClosiObi 80x100 Monocular with BAK4 Prism and Phone Adapter
ClosiObi 80x100 Monocular with BAK4 Prism and Phone Adapter
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Professional Optics That Feel
Like Magic
ClosiObi fits 80x magnification into the palm of your hand. Using BAK4 prisms and FMC coating, it delivers crystal-clear images that standard binoculars can't match.
Without ClosiObi
- Grainy, digital phone zoom
- Heavy neck strain from binoculars
- Darkened edges in low light
- Missed wildlife at 1000m+
With ClosiObi
- 80x HD optical magnification
- Pocket-sized portability
- BAK4 edge-to-edge brightness
- Direct-to-phone HD photography
5000m Range
Extreme distance
BAK4 Prism
Edge-to-edge clarity
Phone Ready
Adapter included
Low Light HD
22mm eyepiece
Built for the Great
Outdoors
80x100 High-Power Optics
Experience unparalleled detail with 80x magnification. Whether birdwatching or at a concert, see objects up to 5000m away with stunning precision.
BAK4 Prism & FMC Coating
Advanced BAK4 glass eliminates edge darkening, while the 5-layer broadband FMC coating maximizes light transmission for true-to-life color.
IPX4 Weatherproof Protection
Engineered for real environments. Handles rain, splashes, and high humidity with an anti-fog design that keeps your view clear in any climate.
HD Smartphone Adapter
Turn your phone into a professional telephoto lens. Compatible with phones 5.8-8.5cm wide to capture and share high-def wildlife photos instantly.
Set Up Your Shot
in Seconds
Intuitive design made for quick action. Don't let a rare bird sighting pass you by while fumbling with settings.
Mount & Adjust
Attach your phone to the included adapter or simply hold the monocular to your eye. Adjust the foldable eyepiece for use with or without glasses.
Dial in Focus
Use the smooth-motion top dial to bring your subject into sharp relief. BAK4 prisms ensure bright, clear contrast instantly.
Capture the Moment
Observe in real-time or tap your phone screen to record 80x zoomed HD video and photos. Use the included tripod mount for zero-shake viewing.
Ready in
10 seconds
See Every Detail
ClosiObi 80x100 Monocular
High-Power BAK4 Prism Monocular
Why Choose ClosiObi
See how our compact high-power optics stack up against traditional gear.
| Optics Feature |
ClosiObi
|
Phone Only
|
Binoculars
|
Pro Telescope
|
|---|---|---|---|---|
| Pocket-Sized | ||||
| Magnification | 80x | 10x-20x | 8x-12x | 100x+ |
| Prism Type | BAK4 | None | BK7/BAK4 | Achromatic |
| Phone Adapter | ||||
| One-Hand Use | Limited | |||
| All-Weather | IPX4 Rated | Variable | ||
| Investment | $79 | $0 | $150-$500 | $1000+ |
The smartest way to bring the world closer.
Get ClosiObi NowLoved by explorers worldwide
"Used this for birdwatching in the Rockies. I could see feathers clearly from across the valley. Easily fits in my side pocket."
"The phone adapter is a game changer. I captured a nesting eagle at 1500 meters and the photo looks professional. Sturdy metal frame feels premium."
"Took it to a stadium concert. I was in the back row but felt like I was front stage. BAK4 prisms make a massive difference in brightness."
30-Day Explorer Guarantee
Try ClosiObi in the wild. If you don't experience crystal-clear 80x vision or if it doesn't meet your expedition standards, return it within 30 days for a full refund. We stand by our optics.
Optic Questions?
We've Got Answers
Bring the World's Beauty
Into Sharp Focus Today
Join 50,000+ hikers, birders, and sports fans who have upgraded their vision with ClosiObi's high-power optics.