Vortex Optics Diamondback SFP Riflescope
- 4 to 12 power zoom range
- 40 mm objective lens
- BDC reticle, second focal plane
- 1 inch tube, Weaver mount type
- 32.4 feet listed field of view
- Lifetime warranty, unconditional
- 14.6 ounces listed weight
Last refreshed Jun 22, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A hunting and range riflescope with a ballistic drop reticle and a lifetime warranty. Eye relief is given without a unit, so confirm it before mounting on a recoil-heavy rifle.
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ASIN: B001EC7KMYCategory: Rifle Scopes
Overview
A hunting rifle or a range bench gets a variable-power riflescope here, with a BDC reticle in the second focal plane. The one-inch tube takes standard rings, and the listing names Weaver as the mounting type.
Reason to look at it: a zoom range and bullet drop reticle for hunting distances, with weatherproofing and a lifetime warranty written into the title. The limitation is the listing detail, with eye relief and field of view given without clear distances.
Who it's for
Hunting from a stand or shooting at a range on a bolt or semi-auto rifle is the situation here. Long-range shooters who need a reticle that scales with zoom, or an illuminated reticle, should read the title before buying.
Pros and cons
- Variable zoom range
- BDC reticle for drop holds
- Shockproof, waterproof, fogproof
- Lifetime unconditional warranty
- Eye relief unit not listed
- Field of view lacks a distance
- Reticle not scaled across zoom
Performance notes
The second focal plane reticle holds one apparent size across the zoom range, so its drop marks match only at the stated power. A larger objective lens lets in more light at dawn and dusk. Eye relief and mount height set how the scope fits the shooter's cheek and how safely it recoils.
Where it stands among rifle scopes
- #1 most-searched brand and model of the 79 rifle scopes lines we track (by search demand, not sales).
From the specs of the 446 rifle scopes we list; not a test result.
Specifications
| Brand | Vortex |
|---|---|
| Dimensions & fit | |
| Objective Lens Diameter | 40 millimeters |
| Item weight | 14.6 ounces |
| Item Dimensions L X W X H | 12 x 2.5 x 2.5 inches |
| Hand Orientation | Ambidextrous |
| Construction & materials | |
| Material Type | Aluminum |
| Color | Black |
| Lens Color | Clear |
| Compatibility & installation | |
| Mounting Type | Weaver Mount |
| Included components | |
| Included Components | Riflescope, removable lens covers, lens cloth |
| Unit Count | 1 Count |
| Warranty & support | |
| Warranty Description | Unlimited, unconditional, lifetime warranty |
| Other details | |
| Magnification Minimum | 4 |
| Magnification Maximum | 12 |
| Product Style | 4-12x40 - Dead-Hold BDC |
| Reticle Type | BDC |
| Field Of View | 32.4 feet |
| Eye relief | 79 (unit not listed) |
| League Name | Fantasy Leagues |
| Sport Type | Hunting, Shooting |
Frequently asked questions
Is the Vortex Diamondback a first focal plane scope?
No. The title lists it as second focal plane, so the reticle stays the same size as the zoom changes.
Which guns does the Vortex Diamondback 4-12x40 fit?
The listing names Rifle as the compatible device and Weaver Mount as the mounting type. It does not mention shotguns, airguns or rail types beyond that.
What does the Vortex Diamondback warranty cover?
The listing states an unlimited, unconditional, lifetime warranty, and the title adds shockproof, waterproof and fogproof.