Vortex Optics Sonora Second Focal Plane Riflescopes

From the Amazon Listing

• The single piece 3-9x50 Sonora second focal plane riflescope has a 1-inch, aircraft-grade aluminum tube and offers a versatile blend of adjustment for a wide variety of applications.
• The Dead-Hold BDC is good for hunting at varying ranges where estimating hold-over is a concern. Fully multi-coated lenses increase light transmission with multiple anti-reflective coatings on all air-to-glass surfaces.
• The locking diopter eyepiece allows the user to set and lock the eyepiece setting once for their eye and forget it.
• The hard anodized finish provides a low-glare matte surface and helps camouflage position. O-ring sealed and nitrogen purged, the Sonora delivers water and fogproof performance. Rugged construction means this scope is shockproof.
• Backed by our unlimited, unconditional, lifetime, VIP Warranty. A fully transferable promise to repair or replace your item if it becomes damaged/defective. Does not cover loss, theft, deliberate damage or cosmetic damage that doesn't hinder performance.