Vortex Diamondback 4-12×40 Review – Hit or Miss?

Vortex Diamondback 4-12x40 review
Image source: Vortex website

Vortex Diamondback 4-12×40

Bottom Line

The Vortex Diamondback 4-12×40 is a solid choice for shooters looking for a reliable, versatile scope without breaking the bank. It offers clear optics, a durable build, and user-friendly features.

9 out of 10 rating
Vortex Optics Diamondback 4-12x40 Second Focal Plane Riflescope -...
  • The Diamondback 4-12x40 riflescope is one of multiple configurations in the Diamondback lineup and is ideal for big game, predator/varmint, muzzleloader, slug shotgun, and long range applications
  • Dead-Hold BDC reticle is good for any hunting or shooting at varying ranges where estimating hold-over would be a concern.
  • Lenses are fully multi-coated for crystal clear, bright images from dawn till dusk. The fast focus eyepiece allows for quick and easy reticle focusing.

If you’re looking to purchase the Diamondback 4-12×40 riflescope, you came to the right place! In this Vortex diamondback 4-12×40 review, you will find out if this optic is easy to use, tough enough for adventures, and most importantly, if it makes aiming a breeze. Will this scope help you hit bullseyes or will it leave you wondering why you bothered? Join us on a fun adventure as we explore every nook and cranny of the Vortex Diamondback, and discover if it’s the hero your rifle has been waiting for.

Vortex Diamondback 4-12×40 Review: Bottomline

The Vortex Diamondback 4-12×40 is a solid choice for shooters looking for a reliable, versatile scope without breaking the bank. It offers clear optics, a durable build, and user-friendly features.


  • Lightweight and compact
  • Affordable
  • High-quality glass
  • Waterproof and fogproof
  • Capped turrets
  • Comes with Vortex’s lifetime warranty


  • Limited reticle options
  • Short eye relief

What Customers Say

Love the crisp view the east focus very easy to zerro once mounted. Will note take the extra time to heck your rings that they are in line. Lap them in and use a tork wrench to tighten the mounts properly. It will payoff in the long run. Less time zerroing it in.

Donald Moran


Better for Longer Distances: Athlon Optics Argos BTR 6-24×50

The Athlon Optics Argos BTR 6-24×50 is an exceptional scope at an accessible price point.

It offers a wide magnification range that allows users to engage targets at various ranges with precision. Its reticle offers accurate holdovers and windage corrections at long distances. The illumination improves reticle visibility in dim conditions and aids in precise shot placement.


  • Wide magnification range
  • Fully multi-coated optics
  • Waterproof, fog-proof, and shockproof
  • Illuminated Reticle


  • Expensive
  • Short eye relief
  • Heavy

What Customers Say

Clear image, nice crosshairs crisp turrets, nice budget scope.

Justice McCann

Better for Low-Light Scenarios: Leupold VX-Freedom 3-9×40

The VX-Freedom is equipped with the Twilight Light Management System, just like every Leupold scope. This feature allows maximum light transmission and reduced glare because of several layers of proprietary lens coatings. This feat will let you hunt in the evening and still get crystal-clear images.

It’s also impressive how this scope is tested to perform in the most extreme climate and pressure changes. Not only is the VX-Freedom made from 6061-T6 aircraft-quality aluminum, but it’s also impact-tested using Leupold’s recoil simulation machine. 


  • Affordable
  • Impact-tested
  • High-quality glass
  • Comes with a lifetime guarantee


  • Elevation and windage turret clicks are a little spongy
  • No illuminated reticle
  • Limited magnification range

What Customers Say

Only complaint is the adjustment knobs feel cheap. Feel like my Burris FFII is a little better quality, however, I like that this Leopold is made in the USA for a good price. Glass seems the same as the FFII.


Vortex Diamondback 4-12×40 Specs

  • Magnification: 4-12x
  • Objective lens diameter: 40mm
  • Reticle: Dead-Hold BDC (MOA)
  • Turret style: Capped
  • Tube size: 1 inch
  • Adjustment graduation: ¼ MOA
  • Weight: 14.6 oz
  • Length: 12 in
  • Eye relief: 3.1 in
  • Parallax setting: 100 yards

Vortex Diamondback 4-12×40 Features

The Vortex Diamondback 4-12×40 comes with several notable features that enhance its performance and usability for shooters. Let’s get into the specifics of these features:

Fully Multi-Coated Lenses

This feature refers to multiple anti-reflective coatings on all air-to-glass surfaces, which results in increased light transmission. It provides clearer, brighter images, especially in low-light conditions like dawn or dusk. Plus, it improves the contrast and quality of the image, so it is easier for you to identify and engage targets accurately.

Dead-Hold BDC Reticle

The Dead-Hold Bullet Drop Compensation (BDC) reticle is designed to minimize the need for guesswork regarding hold-over at long distances. This is particularly useful for shooting at varying ranges where estimating bullet drop is crucial. The reticle features marking points that can be used to compensate for wind drift and bullet drop, making it easier to hit targets accurately without having to adjust the scope’s elevation and windage turrets extensively.

Precision-Glider Erector System

This system ensures that the zoom lens mechanism glides smoothly and cleanly throughout the magnification range, even under harsh conditions. It uses premium components in the zoom lens mechanism to guarantee that the adjustment is precise and effortless. This feature is vital for shooters who need to change magnification levels quickly in response to dynamic shooting scenarios.

Capped Reset Turrets

The turrets on the Vortex Diamondback 4-12×40 are capped to protect them from being accidentally adjusted. These caps can be easily removed when adjustments are needed. Once the scope is zeroed, the turrets can be re-indexed to zero without needing any tools, allowing shooters to quickly return to their original settings after making temporary adjustments. This is particularly useful in hunting or shooting situations where temporary changes in elevation or windage are needed, but the shooter wants to quickly revert back to the original zero setting.


Is a Vortex Diamondback 4-12×40 a good scope?

Yes, the Vortex Diamondback 4-12×40 is considered a good scope, particularly for its price range. It offers a blend of quality, reliability, and features that are highly appreciated by everyday shooters. Additionally, Vortex’s reputation for excellent customer service and their lifetime warranty add significant value to their products.

What is a 4-12×40 scope good for?

A 4-12×40 scope is versatile and can be used for a wide range of shooting activities. The magnification range of 4x to 12x makes it suitable for both close to mid-range and longer-range shots. It can accommodate different types of hunting, from varmint to big game, as well as target shooting and plinking. 

The 40mm objective lens provides a good balance between light-gathering capability and a manageable size, so the scope is practical for both stationary and mobile use.

How far can a 4-12×40 scope see?

The distance a 4-12×40 scope can “see” depends on several factors, including the user’s eyesight, the quality of the optics, and the environmental conditions. Generally, a scope with 12x magnification can effectively be used to identify and engage targets at distances of up to 600 yards or more, under ideal conditions. However, the practical shooting range will also depend on the shooter’s skill, the firearm used, and the type of target.

Is the Vortex Diamondback worth it?

For many shooters, the Vortex Diamondback 4-12×40 is considered worth it due to its balance of cost, performance, and quality. It’s a reliable scope that provides clear optics, a durable design, and user-friendly features like the Dead-Hold BDC reticle and capped reset turrets. 

Final Thoughts: Vortex Diamondback 4-12×40 Review

Wrapping up our Vortex Diamondback 4-12×40 review, it’s clear this scope hits the sweet spot for shooters seeking quality without splurging. It’s the perfect partner for those aiming to enhance their shooting game, with its crisp visuals, sturdy build, and user-friendly features. Plus, it’s backed by Vortex’s solid reputation and unbeatable warranty. For hunters and target shooters alike, this scope will deliver reliability and performance to your rifle’s top rail.

Vortex Diamondback 4-12×40 Score Card

MagnificationOffers a versatile 3-9x magnification range suitable for a variety of shooting distances.4.5
Optical QualityDelivers crisp, clear images with high-quality glass and coatings for superior light transmission.4
ReticleFeatures a user-friendly reticle design for easy target acquisition and precision aiming.5
Adjustment TurretsEquipped with precise, tactile adjustment turrets for easy windage and elevation corrections.4.5
DurabilityBuilt to last with a rugged construction that is waterproof, fogproof, and shockproof for reliable performance in all conditions.4.5
OverallA well-rounded, high-performance riflescope offering excellent value with its combination of functionality, durability, and optical clarity.4.5
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Last update on 2024-03-24 / Images from Amazon Product API