40x60 Monoculars Weak Night Vision w/Tripod BAK4 Outdoor Camping Hunting Bird. Model: 20X50. Prism: BAK4. 1080P Digital Binoculars Night Vision 12x Goggles Video Recorder w/ 2.3" Screen. 28 mm large eyepiece, the larger the aperture, the much light it enters, the clearer the small image, the more details can be seen.