Last update on June 4, 2023 // Source: Amazon API
Rifle Scope Product Details
SI Hunter Tac Series Riflescope – 3-9x40mm Reticle: Duplex
Fast Focus Eyeball featured with all SIII Series Rifle scopes. Allows for quick and easy adjustments when in the field. Diopter adjustment ranges from -2.0 to +1.0 settings. Finger Adjustable Wind age & Elevation The round knurled dials are complete with positive clicks and provide all the precision needed to complement your Sight Ron scope. Available on all 2009 and later models. Features: – All Weather Construction – This scope features the ultimate in all weather construction. They are waterproof, nitrogen filled and provide a lifetime of internal fog protection for inclement weather, SIH Series Multi-Coated Lenses, All SI Hunter Series Rifle scopes offer Multi-Coated lenses that provide superior optical clarity. Specifications: Magnification: 3-9X – Object Diameter: 40 – Eye Relief: 3.0-3.9 – Reticle Type: Duplex – Click Value: 1/4 MOA – Fob: 37.3-11.7 – Length: 11.93 – Tube Diameter: 1 – Wind age Elevation Travel: 70 – Weight: 15.00 – Finish: Matte Black – Minutes Per Revolution: 15 – Knob Type: Hunting – Sunshade Included: No – Lens Cover Included: Yes – Waterproof: Yes – Wind age Elevation Knobs: Finger Adjustable – Adjustable Objective: No – Fully Multi Coated: Multi Coated.
Rifle Scope Product Features
SIH-TAC39X40, SI Hunter
Scopes & Accessories
SIH-Tac Series Riflescope 3-9x40mm
About the SIGHTRON Scope Maker
SIGHTRON is a premium manufacturer for weapon scopes, optics, mounts, and other add-ons used for firearms like rifles and long guns. They innovate and manufacture their products by making the most of building materials which are long lasting and resilient. This includes the SI Hunter Tac Series Riflescope – 3-9x40mm Reticle: Duplex by SIGHTRON. For more shooting products, visit their site.
Rifle Glass Details
Rifle scopes permit you to precisely aim a rifle at different targets by lining up your eye with the target over a distance. They do this through zoom by using a set of lenses within the scope. The scope’s alignment can be dialed in to take into account many ecological things like wind and elevation increases to make up for bullet drop.
The scope’s purpose is to help shooters understand precisely where the bullet will land based on the sight picture you are viewing with the optic as you line up the scope’s crosshair or reticle with the intended point of impact. Many modern-day rifle scopes and optics have around eleven parts which are located inside and on the exterior of the scope. These scope parts consist of the rifle scope’s body, lenses, windage and elevation dials or turrets, focus rings, and other components. See all eleven parts of a scope.
About Glass Types
Rifle scopes can be either “first focal plane” or “second focal plane” type of scopes. Deciding on the best type of rifle scope is based on what type of shooting you plan on doing.
Info on First Focal Plane Scopes
Focal plane scopes (FFP) include the reticle in front of the magnification lens. These types of scopes are useful for:
- Quick acquisition, far away kinds of shooting
- Shooting circumstances where calculations are low
- Experienced shooters who know their target “hold over” and also “lead” equations for their firearms
- Shooters who don’t mind the reticle is enlarged and occupies more visual sight room than a SFP reticle
Info About Second Focal Plane Glass
Second focal plane glass (SFP) come with the reticle to the rear of the magnifying lens. This induces the reticle to stay at the very same size relative to the amount of magnification being used. The result is that the reticle measurements adapt based on the zoom applied to shoot over lengthier distances given that the reticle measurements present various increments which can vary with the magnification. In the FFP illustration with the SFP glass, the 5x “zoom” one hundred yard tick reticle measurement would be 1/5th of the non “zoom” tick reticle measurement. These particular styles of glass are useful for:
- Long distance styles of shooting where shooters have more time to make ballistic computations
- Shooting where most shots occur within much shorter spaces and ranges
- Shooters who select a clearer optic sight picture with less space taken up by the enlarged FFP reticle
The extent of scope zoom you require depends upon the form of shooting you like to do. Pretty much every type of rifle scope offers some degree of zoom. The level of magnification a scope delivers is determined by the diameter, density, and curves of the lenses within the rifle optic. The zoom of the optic is the “power” of the scope. This suggests what the shooter is aiming at through the scope is magnified times the power factor of what can usually be seen by human eyes.
Fixed Power Lens Rifle Glass Details
A single power rifle optic and scope will have a zoom number designator like 4×32. This indicates the zoom power of the scope is 4x power while the objective lens is 32mm. The magnification of this kind of scope can not fluctuate since it is a fixed power scope.
Variable Power Lens Rifle Glass Info
Variable power rifle scopes can be changed between magnification increments. It will note the zoom degree in a configuration such as 2-10×32. These numbers indicate the magnification of the scope could be adjusted between 2x and 10x power. This always incorporates the power levels in-between 2 and 10. The power adaptation is achieved utilizing the power ring component of the scope near the rear of the scope by the eye bell.
Power and Range
Here are some advised scope power levels and the ranges where they can be efficiently used. Highly magnified scopes will not be as efficient as lower magnification rifle scope glass given that too much magnification can be a bad thing. The same idea relates to longer ranges where the shooter needs to have sufficient power to see exactly where to best aim the rifle at the target.
Lens Coating for Glass
All modern-day rifle scope lenses are coated. There are different types and qualities of coatings. When looking at high end rifle optics and scope systems, Lens coating can be a very important element of defining the rifle’s capability. The glass lenses are one of the most key pieces of the optic due to the fact that they are what your eye looks through while sighting a rifle in on the point of impact. The finish on the lenses offers protection to the lens surface area and even helps with anti glare capabilities from excess direct sunlight and color exposure.
ED Versus HD Rifle Optics
Some scope makers also use “HD” or high-definition lens coverings which use different processes, components, chemicals, and polarizations to draw out a wide range of colors and viewable quality through the lens. Some scope makers use “HD” to refer to “ED” implying extra-low dispersion glass.
Single Coating Versus Multi-Coating for Rifle Scopes
Various optic lenses can likewise have different finishes applied to them. All lenses typically have at least some type of treatment or coating applied to them prior to being used in a rifle scope or optic.
This lens treatment can protect the lens from scratches while lowering glare and other less helpful things experienced in the shooting environment while sighting in with the scope. The quality of a single coated lens depends on the scope producer and how much you paid for it.
Some scope makers also make it a point to define if their optic lenses are covered or “multi” coated. This implies the lens has several treatments applied to the surfaces of the glass. If a lens receives multiple treatments, it can show that a company is taking several actions to combat various natural aspects like an anti-glare finishing, a scratch resistant anti-abrasion coating, followed by a hydrophilic coating. This additionally doesn’t necessarily suggest the multi-coated lens will perform better than a single coated lens. Being “much better” depends upon the producer’s lens treatment techniques and the quality of materials used in building the rifle optic.
Anti-water Rifle Scope Lens Finishing
Water on a lens doesn’t assist with keeping a clear sight picture through a scope at all. Lots of top of the line and high-end optic makers will coat their lenses with a hydrophilic or hydrophobic finishing.
Rifle Scope Mounting Choices
Installing solutions for scopes come in a few options. There are the basic scope rings which are individually mounted to the scope and one-piece mounts which cradle the scope. These different kinds of mounts also normally are made in quick release variations which use toss levers which enable rifle operators to quickly install and remove the optics.
Hex Key Rifle Glass Rings
Standard, clamp type mounting scope rings use hex head screws to install to the flattop design Picatinny scope mounting rails on the tops of rifles. These forms of scope mounts use two separate rings to support the scope, and are usually constructed from 7075 T6 billet aluminum which are developed for long distance accuracy shooting. This type of scope mount is excellent for rifles which require a durable, unfailing mount which will not shift regardless of just how much the scope is moved about or jarring the rifle takes. These are the style of mounts you should have for a faithful scope system on a far away hunting or sniper competition long gun which will seldom need to be altered or adjusted. Blue 242 Loctite threadlocker can additionally be used on the mount screws to protect against the hex screw threads from backing out after they are installed safely in place. An example of these rings are the 30mm style from Vortex Optics. The set generally costs around $200 USD
Rifle Glass Mounts with Quick-Release Cantilever Rings
These kinds of quick-release rifle scope mounts can be used to quickly attach and remove a scope from a rifle. If they all use a comparable style mount, a number of scopes can often be switched on the range. The quick detach mount style is CNC crafted from anodized 6061 T6 aluminum and the mounting levers fasten tightly to a flat top design Picatinny rail. This lets the scope to be sighted in while on the rifle, removed from the rifle, and remounted back on the rifle while preserving precision. These kinds of mounts come in practical for shooting platforms which are hauled around a lot, to remove the optic from the rifle for protection, or for scopes which are chosen for use between a number of rifles. An example of this mount style is the 30mm mount designed by the Vortex Optics manufacturer. It normally costs around $250 USD
Rifle Scope Tube Sealing and Gas Purging
Moisture inside your rifle optic can ruin a day of shooting and your expensive optic by bringing about fogging and creating residue inside of the scope tube. Many scopes avoid wetness from going into the scope tube with a system of sealing O-rings which are waterproof.
Gas Purged Rifle Scope Tubes
Another part of preventing the accumulation of wetness within the rifle optic’s tube is filling the tube with a gas like nitrogen. Considering that this area is currently occupied by the gas, the glass is less altered by condition changes and pressure distinctions from the outside environment which may potentially allow water vapor to permeate in around the seals to fill the vacuum which would otherwise exist. These are good qualities of a decent rifle scope to seek out.