The Marine-3 7x50 Porro Prism Monocular from Opticron is a durable and waterproof monocular with 7x magnification. It features an enlarged porro prisms and anti-reflective multi-coatings to maximize field of view, cross-field resolution and low light performance. An 18mm eye relief eyepiece and large depth of field provide the best chances for stable, comfortable viewing under constant motion with or without glasses. With a fully nitrogen gas-filled waterproof housing and specially mounted prism assemblies, the internal elements are well-protected. A strong, single die-cast aluminum body with thick rubber armoring is durable in even the harshest conditions.

Enlarged Porro Prisms    Anti-Reflective Multi-Coatings    Cross-Field Resolution    Nitrogen Gas-Filled Waterproofing    Single Die-Cast Aluminum Alloy Body    Thick Rubber Covering    Minimum Focus Distance: 14.8'    18mm Eye Relief Eyepiece    Integrated Objective Lens Cap    Limited Lifetime Warranty

• Porro prisms
• Magnification: 7x
• Objective lenses: 50mm diameter
• Anti-reflective multi-coating
• Large depth off field

• 18mm eye relief
• Twist-type eyecup
• Case, cloth and lanyard included

• Nitrogen-filled for waterproof performance
• Specially mounted prism assemblies
• Single die-cast aluminum bodies 
• Thick rubber covering
• Integrated objective lens cap

Related Questions and Answers

Q: 1. what is the difference between Bushnell Legacy WP and Bushnell H20Porro binoculars?

A: I asked the same when I was ordering the 8x42 binoculars to donate to the Environmental Education program a the Cloud Forest School in Monteverde Costa Rica. I ended up with the Legacy WP's . Although they seemed well made, they were too large, too heavy, and too hard to focus...not only to be used with K-11 students but also for me. B+H Photo was excellent about processing the return. I purchased the 8x25 compact H2O binocs instead.Just returned from delivering them to the Cloud Forest School where they are already being used with ease.

Q: 2. What is the lever on the side? Is that the focusing mechanism?

A: The lever on the Opticron 8x25 T4 Trailfinder WP Monocular (Black) BH #OP8X25T4TMB • MFR #30710 is for focusing.

Q: 3. What are the internal dimensions of the case?

A: The Opticron Ballistic Nylon Case for 50mm Roof Prism Binoculars is about 6.5x6x3 inches inside.

Q: 4. Conflicting information shown. Is this monocular Fog Proof or Fog Resistant?

A: Yes this model is Nitrogen-Filled, Water and Fogproof.

Q: 5. Hello, It looks to me like the binoculars are in use. What is his condition? Is it almost new or in good or average condition? Are there any pictures of him? I need clarification. Thank you.

A: The Steiner 7x50 Military/Marine Binoculars are new. All items are new unless specifically stated otherwise.

Q: 6. Do these come with a case, a strap and lens covers ?

A: Yes the Bushnell 7x50 H2O Porro Prism Binoculars come with a case, neck straps and lens caps.

Q: 7. Does the manufacturers warranty apply to used Bushnell 137500?

A: The Manufacturer Warranty does not apply for the Bushnell 7x50 Marine Binoculars with Compass (Blue) used model. The B&H used model is going to have a 30 day Used warranty that can be upgraded up to 3 years .

Q: 8. Is the compass visible in the dark/ at night?

A: Yes, that's what illuminated means.

Q: 9. I'm looking for a scope that can tell me the elevation (in degrees) of an object with respect to the horizon. Sorta like a sextant for navigation, but in a compact monocular or binocular system. Any ideas??? Thank you so much!!!

A: Unfortunately we don't have anything like that.

Q: 10. Will these work in the Southern Hemisphere ?

A: No and I forgot about that the _vertical_ component of the Earth's magnetic field tilts the disc/needle opposite ways in the North and South, so a weight is needed. With a normal compass you can sometimes tilt it to compensate, but with this you can't do that.I lost a huge chunk of cost savings getting it adjusted for Ausie...it cost me IIRC about $120+ at The Aust branch, with post.Nick