The OM System S 10x50 Porro Prism binocular is a full-size observation instrument designed for daylight and low-light use. With 10x magnification and a large 50mm objective lens, it delivers bright, detailed views of distant subjects.
10x magnification with 50mm objective lens provides a bright, wide view
Porro prism design with aspherical lenses for sharp edge-to-edge clarity
Twilight factor of 22.4 supports usable observation in fading light
Compact, lightweight body at 855 g for comfortable extended use
What sets the OM System S apart
The asphärische lenses reduce distortion and spherical aberration across the entire field of view, while the Porro prism configuration delivers depth perception and a natural 3D image. The 113 m field of view at 1000 m allows quick target acquisition in open terrain.
Ideal for
Birdwatchers, hikers, and outdoor enthusiasts who need a reliable full-size binocular for extended observation sessions. The 855 g weight keeps fatigue low during multi-hour use in the field.
Application of OM System S 10x50 Porro Prism Binocular
Adjust the interpupillary distance by folding the eyecups to match your eyes
Focus using the central wheel until the image appears sharp
Use the diopter adjustment on the right eyepiece to fine-tune for individual vision
Store in the included case when not in use to protect the lenses
OM System is the optical brand of the Japanese manufacturer Olympus, now operating independently after the spin-off of the Olympus imaging division. The brand focuses on binoculars, microscopes, and endoscopic imaging equipment, serving both professional and consumer markets. OM System binoculars are known for their optical precision and robust build quality.
A full-size Porro prism binocular with 10x magnification, 50mm objective lenses, and aspherical lens elements for sharp, bright views in daylight and low-light conditions.
The twilight factor is 22.4, calculated as the square root of the product of magnification (10) and objective lens diameter (50). It indicates the instrument's ability to resolve detail in low-light conditions; a higher value means better performance at dusk and dawn.
The binocular weighs 855 g, making it a full-size instrument that is manageable for extended use. It is suitable for hiking and outdoor observation, though a tripod or harness is recommended for multi-hour sessions to reduce fatigue.
The binocular comes with a protective carrying case. The delivery includes the OM System S 10x50 Porro Prism binocular, eyecups, a neck strap, and the case.
The product includes a 24-month manufacturer warranty. Register the product on the OM System website to activate the warranty and receive support for any manufacturing defects.
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