The VX-3HD 3.5-10x40mm delivers legendary performance and extreme clarity in an incredibly tough, lightweight package. Its versatile magnification can get the job done in almost any scenario. The VX-3HD delivers outstanding performance in low light. With Leupold's Elite Optical System, it has excellent dawn-to-dusk light transmission for a bright image when it matters most, elite-level glare reduction in harsh light, and the resolution and clarity that diehard hunters and shooters demand. The illuminated FireDot reticle with seven brightness settings and easy-to-use illumination dial will get you on target fast, even in harsh daylight. Theyalso gave it match-grade repeatability and ergonomic controls that are easy to read and use, even with gloves. The VX-3HD is the best lightweight, low-light hunting scope in its class. And with its low-profile, one-revolution CDS ZeroLock dial, you can be confident your dial will only move when you want it to. Push the button to unlock it, dial, and then rotate it back to zero to lock it in place. It's that simple.