Last update on May 22, 2022 // Source: Amazon API
Rifle Scope Product Details
SG Tactical 3-9X40E Rifle Scope with Dual Red & Green Illuminated
SG Tactical 3-9X40E Rifle scope Optics Hunting Red & Green Mil-dot Reticle Illuminated Crosshair Adjustable Intensified Rifle Scope with Lens Cover Illuminated Level: 5 Intensity (Red) and 5 Intensity (Green) Specification: Finish: Matte Black Waterproof :Yes Minimum Power: 3 Maximum Power: 9 Adjustment Click Value 1/4 MOA Adjustment Type: Click Finger Adjustable Turrets Yes Turrets Resettable to Zero: Yes Fast Focus Eye Piece Yes Warranty: Sportsman’s Gear limited lifetime warranty Illuminated Reticle: yes Lens Covers Included: Yes Reticle Construction Wire Illuminated Reticle: Yes Battery Type CR2032 Fog Proof: Yes Shock Proof: Yes Objective Lens Diameter: 40 Millimeter Eye Relief 80 Millimeter Exit Pupil Diameter: 10.67-3.56 Millimeter Field of View @ 100 Yards Minimum Power 7.6° Field of View @ 100 Yards Maximum Power 3° Maximum Windage Adjustment 65 MOA Maximum Elevation Adjustment 65 MOA Weight : 17OZTube Diameter: 25.4mm
Rifle Scope Product Features
Minimum Power 3 Maximum Power 9
100% water and fog-proof housing, O-ring sealing and Nitrogen filling ensure moisture never penetrates interior
Red & Green Mil-dot Reticle Illuminated Crosshair , 5 Intensity (Red) and 5 Intensity (Green)
Adjustment Click Value 1/4 MOA
Turrets Re settable to Zero: Yes
About the SG Sportsman’s Gear Scope Maker
SG Sportsman’s Gear is a premium supplier for firearm scopes, optics, mounting solutions, and other components used for firearms like rifles and long guns. They innovate and supply their scopes and related products by choosing building materials which are resilient and long lasting. This includes the SG Tactical 3-9X40E Rifle Scope with Dual Red & Green Illuminated by SG Sportsman’s Gear. For additional shooting products, visit their website.
Rifle scopes permit you to specifically aim a rifle at various targets by lining up your eye with the target over a distance. They accomplish this through magnification by using a series of lenses inside the scope. The scope’s positioning can be adjusted for consideration of various ecological elements like wind speed and elevation to account for bullet drop.
The scope’s purpose is to help shooters understand precisely where the bullet will land based upon the sight picture you are seeing via the scope as you align the scope’s crosshair or reticle with the target. Many modern-day rifle optics have about 11 parts which are located within and externally on the optic. These optic pieces include the rifle scope’s body, lenses, modification dials or turrets, objective focus rings, and other parts. See all eleven parts of a rifle scope.
About Rifle Glass Types
Rifle scopes can be either “first focal plane” or “second focal plane” type of scopes. Choosing the perfect type of rifle optic depends on what type of shooting you plan on doing.
About First Focal Plane Glass
First focal plane glass (FFP) feature the reticle before the magnifying lens. This induces the reticle to increase in size based on the amount of zoom being used. The benefit is that the reticle measurements are the same at the amplified range as they are at the non amplified distance. As an example, one tick on a mil-dot reticle at one hundred yards without having “zoom” is still the corresponding tick at 100 yards with 5x “zoom”. These types of scopes are beneficial for:
- Quick acquisition, far away kinds of shooting
- Shooting scenarios where estimations are marginal
- Experienced shooters who understand their aim point “hold over” and also “lead” correlations for their rifles
- Shooters who don’t mind the reticle is enlarged and requires more visual eyesight room than a SFP reticle
Second Focal Plane Optic Details
Second focal plane scopes (SFP) feature the reticle behind the magnification lens. In the FFP example with the SFP scope, the 5x “zoom” 100 yard tick would be 1/5th of the non “zoom” tick measurement.
- Far away forms of shooting where shooters have additional time to make ballistic computations
- Shooting where most of the shots take place within much shorter ranges and spaces
- Shooters who desire a clearer optic picture with less area used up by the larger sized FFP reticle
Magnification for Rifle Glass
The amount of magnification a scope provides is determined by the size, density, and curvatures of the lenses inside of the rifle scope. The zoom of the scope is the “power” of the scope.
Fixed Power Lens Rifle Optics
A single power rifle optic comes with a zoom number designator like 4×32. This means the zoom power of the scope is 4x power and the objective lens is 32mm. The magnification of this kind of optic can not change since it is set from the factory.
Adjustable Power Lens Optic Info
Variable power rifle scopes have adjustable power. These types of scopes will list the magnification degree in a format such as 2-10×32. These numbers imply the magnification of the scope could be changed between 2x and 10x power. This also incorporates the powers in-between 2 and 10. The power modification is accomplished by operating the power ring component of the scope near the rear of the scope by the eye bell piece.
Scope Power and Ranges
Here are some suggested scope powers and the distances where they may be effectively used. Always remember that higher power glass will not be as efficient as lower magnification level scope and optics because increased magnification can be a detractor. The same idea goes for extended ranges where the shooter needs to have enough power to see exactly where to properly aim the rifle.
Optic Lens Finish
All cutting-edge rifle optic and scope lenses are layered. Lens finishing is an important aspect of a shooting platform when purchasing high end rifle optics and scope equipment.
ED Versus HD Rifle Scopes
Some scope manufacturers likewise use “HD” or high-definition lens finishes which use different techniques, chemicals, components, and polarizations to draw out a wide range of colors and viewable quality through the lens. Some scope manufacturers use “HD” to refer to “ED” to signify the lens has extra-low dispersion glass.
Single Finish Versus Multi-Coating
Different optic lenses can also have various coverings applied to them. All lenses normally have at least some type of treatment or finish used to them before they are used in a rifle scope or optic.
Single layered lenses have a treatment applied to them which is typically a protective and enhancing multi-purpose treatment. This lens treatment can preserve the lens from scratches while decreasing glare and other less helpful things experienced in the shooting environment while sighting in with the optic. The quality of a single coated lens depends upon the scope company and how much you spent for it. The scope’s maker and cost are indicators of the lens quality.
Some scope producers similarly make it a point to define if their optic lenses are coated or “multi” covered. Being “much better” depends on the maker’s lens treatment technology and the quality of materials used in building the rifle scope.
Hydrophobic Finish for Rifle Scopes
Water on a lens doesn’t help with preserving a clear sight picture through a scope at all. Numerous top of the line and military grade optic makers will coat their lenses with a hydrophobic or hydrophilic finishing which is water repellent.
Rifle Scope Mounting Choices
Installing solutions for scopes are available in a few choices. There are the basic scope rings which are separately mounted to the scope and one-piece mounts which cradle the scope. These various kinds of mounts also usually come in quick release versions which use manual levers which enable rifle shooters to rapidly mount and remove the optics.
Hex Key Rifle Glass Ring Mounting Solutions
Normal, clamp style mounting scope rings use hex head screws to mount to the flattop style Picatinny scope installation rails on rifles. These types of scope mounts use a couple of different rings to support the optic, and are often made from 7075 T6 billet aluminum which are developed for long range precision shooting. This type of scope install is wonderful for rifles which require a durable, rock solid mount which will not move no matter how much the scope is moved or abuse the rifle takes.
Scope Mounts with Quick-Release Cantilever Rings
These types of quick-release rifle scope mounts can be used to quickly connect and take off a scope from a rifle. If they all use a comparable design mount, a number of scopes can also be switched on the range. The quick detach design is CNC crafted from anodized 6061 T6 aluminum and the mounting levers fasten nicely to a flat top design Picatinny rail. This allows the scope to be sighted in while on the rifle, taken off of the rifle, and remounted back on the rifle while preserving the original sighting settings. These kinds of mounts are useful and handy for rifles which are carried a lot, to remove the glass from the rifle for protection, or for aiming systems which are used in between several rifles. An example of this mount style is the 30mm mount from Vortex Optics. It typically costs around $250 USD
Info on Glass Tube Sealing and Gas Purging
Wetness inside your rifle glass can destroy a day on the range and your highly-priced optic by inducing fogging and generating residue inside of the scope tube. Most scopes prevent humidity from going into the scope tube with a series of sealing O-rings which are water resistant. Normally, these water resistant scopes can be immersed under 20 or 30 feet of water before the water pressure can force moisture past the O-rings. This should be plenty of wetness prevention for basic use rifles, unless you plan on taking your rifle sailing and are worried about the optic still functioning if it falls overboard and you can still salvage the rifle.
Gas Purged Scope Tubes
Another element of preventing the accumulation of wetness inside of the rifle optic’s tube is filling the tube with a gas like nitrogen. Since this area is already occupied by the gas, the glass is less influenced by temperature shifts and pressure variations from the outdoor environment which might possibly enable water vapor to seep in around the seals to fill the vacuum which would otherwise be there. These are good qualities of a decent rifle scope to seek out.