Prism material:BAK4. BAK4 prism and multi-coated lens for improved light transmission and image clarity. Keep a proper exit pupil distance with the eyepiece. If the stickers are too close or too far away, you will feel dark shadows in the field of view when observing, and you will not be able to get a complete circle of vision.
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EYSDON 5X Barlow Lens 1.25" Metal Fully Coated Focal Length Extender For Astronomical Telescopes With M42 Camera T2 Threads
Aliexpress UK
Prism material:BAK4. BAK4 prism and multi-coated lens for improved light transmission and image clarity. Keep a proper exit pupil distance with the eyepiece. If the stickers are too close or too far away, you will feel dark shadows in the field of view when observing, and you will not be able to get a complete circle of vision.
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1.25IN Telescope Collimator 2INCH Adapter Reflector Telescope Newtonian SCA Laser Collimation 7 Brightness Level Astronomical
Aliexpress UK
Low-light-level Vision: With low-light-level vision function, it enables you to observe clearly in low light condition. Because the refractive index is higher than ordinary glass, the image is much clearer.
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60x21 BAK4 Zoom Monocular Binoculars with Wrist Strap Mini Portable Telescope Optics Scope for Outdoor Camping Hunting Telescope
Aliexpress UK
Discover the beauty of nature up close with this powerful spotting scope! 1 x Spotting Scope. 1 x Tripod. Superior Optics for Bright, Clear Views: Equipped with a fully multi-coated 60mm green film objective lens and a high-quality BAK4 Porro prism, this scope maximizes light transmission, providing sharper, brighter images and a wider field of view (40M/19.2M-1000M).
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APEXEL 60X Mobile Phone Telescope Lens Astronomical Telephoto Zoom Lens With Extendable Tripod for iPhone Huawei All Smartphones
Aliexpress UK
🔍 2000x25 High Definition Monocular – Crystal-clear viewing for bird watching, camping, hiking, and travel. Constructed fromdurable plastic, this monocular is built for reliability in outdoor conditions while remaining easy to carry.
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Baigish Russian 8-24X40 Monocular Telescope Large Objective Long Rang Zoom Binocular Metal High Power HD Spyglass Spotting Scope
Aliexpress UK
Experience crystal-clear views with our HD binoculars featuring BAK4 prisms and FMC lenses for superior light transmission. The compact and foldable design makes these binoculars easy to carry, perfect for travel, camping, and other outdoor adventures.
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APEXEL 60X Mobile Phone Telescope Lens Astronomical Telephoto Zoom Lens With Extendable Tripod for iPhone Huawei All Smartphones
Aliexpress UK
The 30x60 Outdoor Travel Folding Binoculars Telescopes in Black are a versatile and compact option for birdwatching, general use, or hunting. With a maximum magnification of 30x and coated lenses, these binoculars provide a clear and detailed view of distant objects. The zoom lens feature allows for precise focusing, while the roof/dach prism optical design ensures high quality images. At 2.3 cm in objective lens diameter, these binoculars are suitable for various outdoor activities and are designed for convenience with a folding design for easy storage and transport.
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Terrans GOTO Onstep V4 Lite/Pro EXOS2/EQ3D Astronomical guide star photography GOTO accessories
Aliexpress UK
HD optics with BAK4 prism. Compact, lightweight and easy to carry, with a solid build and clear optics. The monocular was opened for inspection only andhas not been used outdoors or in practice. 40x60 magnification.
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WiFi Digital Telescope,70x Zoom 1920X1080 Monocular Camera Monitor with Tripod Cellphone APP Control Support Android IOS System
Aliexpress UK