Olympus 10x21 RC II WP Binoculars - Dark Green

Yes, they have a built-in dioptric correction adjustment to compensate for individual eyesight. However, the eye relief is 9.5 mm, so users who wear thick-rimmed glasses might find the field of view slightly restricted.

The binoculars are designed to withstand exposure to water, such as rain or splashes, without damage. They are not intended for underwater use or prolonged submersion.

Use a soft lens brush to remove dust, followed by a microfiber lens cleaning cloth. For stubborn smudges, use a dedicated lens cleaning solution sparingly on the cloth.

The closest focusing distance for the Olympus 10x21 RC II WP binoculars is 3 meters (approximately 9.8 feet).

While they offer multi-coated lenses for brightness, the 21mm objective diameter limits the amount of light gathered. They perform best in good daylight conditions. For very low light, larger objective lenses are generally more effective.

The apparent field of view (51°) is how wide the view appears through the eyepieces, while the real field of view (5.1°) is the actual angle of the scene you are observing from your position.

The Olympus 10x21 RC II WP binoculars weigh 215 grams, making them very lightweight and portable.

Ensure the center focus knob is adjusted correctly. If you wear glasses, check the dioptric correction setting on the right eyepiece.

Check for any obstructions or debris. Gently operate the folding mechanism; do not force it.

Clean the lenses with a soft brush and cloth. Ensure the objective lenses are not obstructed. The performance may also be reduced in very low light conditions due to the objective lens size.

This could indicate a breach in the waterproofing. Allow the binoculars to air dry in a warm, dry place. If the issue persists, contact customer support. Avoid using them in wet conditions until resolved.