Last update on February 8, 2023 // Source: Amazon API
Rifle Scope Product Details
SIGHTRON 25177 SIII Long Range Zero Stop Riflescope, 10-50x60mm, 30mm Tube, Illum MOA Type Reticle, Sf, 1/4 Tactical Knobs, Matte
Sightron SIII long range zero stop riflescope, 10-50x60mm specifications: – magnification: 10-50X – objective diameter: 60mm – main tube diameter: 30mm – reticle: illuminated MOA type – side focus – 1/4 tactical knobs – coating: multi coated – finish: matte black.
Rifle Scope Product Features
Objective diameter: 60Mm
Main tube diameter: 30Mm
About the SIGHTRON Manufacturer
SIGHTRON is a premium producer for long gun scopes, optics, mounts, and other accessories used for firearms like rifles and long guns. They style and build their scopes and related products by choosing materials which are long lasting and durable. This includes the SIGHTRON 25177 SIII Long Range Zero Stop Riflescope, 10-50x60mm, 30mm Tube, Illum MOA Type Reticle, Sf, 1/4 Tactical Knobs, Matte by SIGHTRON. For more shooting products, visit their website.
Rifle Scope Info
Rifle scopes permit you to specifically align a rifle at various targets by lining up your eye with the target at range. They do this through zoom by making use of a series of lenses inside the scope. The scope’s alignment can be dialed in for consideration of different natural elements like wind and elevation decreases to account for bullet drop.
The scope’s purpose is to understand exactly where the bullet will hit based upon the sight picture you are viewing via the optic as you line up the scope’s crosshair or reticle with the intended target. The majority of modern rifle scopes have around eleven parts which are found inside and externally on the optic. These scope parts include the rifle scope’s body, lenses, adjustment dials, focus rings, and other elements. See all eleven parts of an optic.
Rifle Glass Types
Rifle scopes can be either “first focal plane” or “second focal plane” style of scopes. The sort of focal plane a scope has establishes where the reticle or crosshair is located in connection with the optic’s zoom. It simply implies the reticle is behind or before the magnification lens of the optic. Selecting the most effective form of rifle optic is dependent on what kind of hunting or shooting you intend on doing.
First Focal Plane Optic Info
Focal plane scopes (FFP) come with the reticle in front of the magnifying lens. This triggers 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 enhanced distance as they are at the non magnified range. One tick on a mil-dot reticle at one hundred yards with no “zoom” is still the very same tick at one hundred yards by using 5x “zoom”. These types of scopes are valuable for:
- Quick acquisition, long distance types of shooting
- Shooting scenarios where estimations are minor
- Experienced shooters who know their aim point “hold over” and “lead” relationships for their weapon
- Shooters who do not mind the reticle is bigger and occupies more visual sight space than a SFP reticle
Second Focal Plane Scopes
Second focal plane scopes (SFP) include the reticle to the rear of the magnification lens. This induces the reticle to stay at the very same size relative to the amount of zoom being used. The effect is that the reticle measurements adjust based upon the zoom chosen to shoot over longer ranges because the reticle measurements present different increments which can vary with the zoom. In the FFP illustration with the SFP optic, the 5x “zoom” 100 yard tick measurement would be 1/5th of the non “zoom” tick. These particular varieties of scopes work for:
- Far away types of shooting where shooters have more time to make ballistic computations
- Shooting where most of the shots occur within much shorter ranges and proximities
- Shooters who desire a clearer optic sight picture without space taken up by the larger sized FFP reticle
Ins and Outs of Rifle Glass Magnification
The level of scope magnification you need on your scope is based on the type of shooting you plan to do. Virtually every type of rifle glass provides some level of magnification. The level of magnification a scope delivers is determined by the diameter, density, and curves of the lens glass inside of the rifle optic. The magnifying level of the scope is the “power” of the scope. This denotes what the shooter is observing through the scope is magnified times the power aspect of what can normally be seen by human eyes.
About Fixed Power Lens Rifle Optics
A single power rifle scope will have a magnification number designator like 4×32. This implies the magnification power of the scope is 4x power while the objective lens is 32mm. The magnification of this type of optic can not adjust considering that it is set from the factory.
Variable Power Lens Scope Facts
Variable power rifle scopes can be tweaked between magnified levels. The power modification is achieved by the power ring part of the scope near the rear of the scope by the eye bell.
The Power Level and Range Correlation of Scopes
Here are some advised scope power settings and the distances where they may be successfully used. Consider that high magnification optics and scopes will not be as practical as lower powered scopes because too much magnification can be a negative thing in certain situations. The exact same idea applies to extended distances where the shooter needs sufficient power to see precisely where to properly aim the rifle at the target.
Lens Covering for Optics
All modern rifle optic lenses are covered in special coatings. There are different types and qualities of glass lens coverings. When considering high end rifle targeting setups, Lens coating can be a crucial aspect of defining the capability of the rifle. The glass lenses are one of the most important pieces of the scope given that they are what your eye sees through while sighting a rifle in on the target. The covering on the lenses safeguards the lens exterior and even assists with anti glare from refracted sunshine and color perception.
HD Versus ED Lenses
Some scope manufacturers likewise use “HD” or high-definition lens coverings which use various methods, elements, chemicals, and polarizations to draw out a wide range of colors and viewable definition through the lens. Some scope makers use “HD” to refer to “ED” meaning extra-low dispersion glass.
Single Rifle Optic Lens Finish Versus Multi-Coating
Different optic lenses can likewise have different coverings applied to them. All lenses generally have at least some type of treatment or finish used to them prior to being used in a rifle scope or optic.
This lens treatment can offer protection to the lens from scratches while lowering glare and other less advantageous things experienced in the shooting environment while sighting in with the scope. The quality of a single coated lens depends on the scope manufacturer and how much you paid for it.
Some scope manufacturers likewise make it a point to define if their optic lenses are covered or “multi” covered. This indicates the lens has had several treatments applied to the surfaces. If a lens receives multiple treatments, it can establish that a company is taking numerous actions to fight different natural elements like an anti-glare coating, a scratch resistant anti-abrasion finish, followed by a hydrophilic coating. This additionally doesn’t always indicate the multi-coated lens will perform better than a single coated lens. Being “better” depends upon the maker’s lens treatment solutions and the quality of glass used in creating the rifle scope.
Rifle Glass Lens Anti-water Covering
Water on an optic’s lens does not improve preserving a clear sight picture through an optic in any way. Numerous top of the line and premium scope makers will coat their lenses with a hydrophobic or hydrophilic coating. The Steiner Optics Nano-Protection is a fine example of this sort of treatment. It deals with the surface of the Steiner optic lens so the H2O molecules can not bind to it or produce surface tension. The result is that the water beads roll off of the scope to maintain a clear, water free sight picture.
Alternatives for Mounting Rifle Scopes on Long Guns
Installing approaches for scopes come in a few choices. There are the basic scope rings which are individually installed to the scope and one-piece scope mounts which cradle the scope. These different types of mounts also generally come in quick release versions which use manual levers which allow rifle shooters to quickly mount and remove the glass.
Hex Key Glass Rings
Standard, clamp style mounting scope rings use hex head screws to mount to the flattop design Picatinny scope mount rails on rifles. These types of scope mounts use a couple of different rings to support the optic, and are made from 7075 T6 billet aluminum which are developed for long range accuracy shooting. This type of scope install is great for rifles which need a long lasting, rock solid mounting solution which will not move no matter how much the scope is moved or abused.
Quick-Release Cantilever Rifle Scope Ring Mounts
These kinds of quick-release rifle scope mounts can be used to quickly remove a scope from a rifle and reattach it to a different rifle. A wide range of scopes can also be switched out if they all use a complementary style mount. The quick detach mount style is CNC machined from anodized 6061 T6 aluminum and the mounting levers fasten securely to a flat top style 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 retaining accuracy. These kinds of mounts are useful and practical for shooting platforms which are carried a lot, to remove the glass from the rifle for protection, or for sight systems which are employed between several rifles. An example of this mount style is the 30mm mount designed by Vortex Optics. It typically costs around $250 USD
Info Around Rifle Glass Tube Sealing and Gas Purging
Wetness inside your rifle optic can destroy a day of shooting and your expensive optic by triggering fogging and creating residue inside of the scope tube. A lot of scopes avoid moisture from going into the scope tube with a system of sealing O-rings which are waterproof.
Info Around Optic Tube Gas Purging
Another part of preventing the buildup of moisture inside of the rifle optic tube is filling the tube with a gas like nitrogen. Since this space is already taken up by the gas, the glass is less affected by temperature level shifts and pressure differences from the external environment which may possibly allow water vapor to permeate in around the seals to fill the void which would otherwise be there. These are good qualities of a decent rifle scope to look for.