Last update on March 28, 2023 // Source: Amazon API
Rifle Scope Product Details
4X20-SCOPE 4×20 Riflex 40mm with Mount
This gorgeous 4×20 rifle scope with mount has the finest details and highest quality you will find anywhere! 4×20 rifle scope with mount is truly remarkable. Product details: ” condition: brand new
Rifle Scope Product Features
Country Of Origin: China
Product Type: Sporting Goods
Item Package Dimensions: 29.972 L X 5.08 W X 3.555 H (Cm)
Item Package Weight: 0.15 Pounds
About the Rtek Scope Maker
Rtek is a premium maker for firearm scopes, optics, mounting solutions, and other accessories used for firearms like rifles and long guns. They innovate and make their scopes, mounts, and related products by using elements which are long lasting and durable. This includes the 4X20-SCOPE 4×20 Riflex 40mm with Mount by Rtek. For more shooting items, visit their site.
Rifle Glass Info
Rifle scopes allow you to precisely aim a rifle at different targets by aligning your eye with the target at range. They accomplish this through zoom by utilizing a series of lenses within the scope. The scope’s positioning can be adapted for the consideration of varied ecological factors like wind and elevation increases to account for bullet drop.
The scope’s purpose is to help shooters understand precisely where the bullet will hit based on the sight picture you are viewing through the scope as you line up the scope’s crosshair or reticle with the target. Many contemporary rifle optics have around 11 parts which are arranged internally and outside of the optic. These scope parts consist of the rifle scope’s body, lenses, elevation dials or turrets, focus rings, and other elements. Learn about the eleven parts of optics.
About Rifle Glass Varieties
Rifle scopes can be either “first focal plane” or “second focal plane” kind of scopes. The style of focal plane a scope has determines where the reticle or crosshair lies in relation to the scopes magnification. It simply suggests the reticle is located behind or before the magnification lens of the optic. Deciding on the most ideal type of rifle glass depends on what variety of hunting or shooting you intend on doing.
First Focal Plane Optics
First focal plane scopes (FFP) come with the reticle in front of the zoom lens. This induces the reticle to increase in size based upon the extent of zoom being used. The result is that the reticle measurements are the same at the enhanced distance as they are at the non amplified range. One tick on a mil-dot reticle at one hundred yards without “zoom” is still the same tick at 100 yards with 5x “zoom”. These kinds of scopes are practical for:
- Quick acquisition, far away types of shooting
- Shooting circumstances where estimations are very little
- Experienced shooters who know their target “hold over” as well as “lead” correlations for their long guns
- Shooters who do not mind the reticle is enlarged and uses up more visual eyesight area than a SFP reticle
Second Focal Plane Scope Details
Second focal plane optics (SFP) include the reticle to the rear of the magnification lens. In the FFP example with the SFP scope, the 5x “zoom” one hundred yard tick reticle measurement would be 1/5th of the non “zoom” tick reticle measurement.
- Far away types of shooting where shooters have more time to make ballistic estimations
- Shooting where most of the shots take place within much shorter proximities and ranges
- Shooters who select a clearer optic sight picture with less room taken up by the larger sized FFP reticle
The amount of zoom a scope supplies is figured out 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.
About Fixed Power Lens Optics
A single power rifle optic uses a magnification number designator like 4×32. This indicates the magnification power of the scope is 4x power while the objective lens is 32mm. The magnification of this kind of optic can not fluctuate because it is set from the factory.
About Adjustable Power Lens Glass
Variable power rifle scopes can be changed between magnification power levels. It will list the magnification amount in a format like 2-10×32. These numbers mean the magnification of the scope could be adjusted in between 2x and 10x power. This additionally includes the power levels in-between 2 and 10. The power shift is achieved by working with the power ring component of the scope near the rear of the scope by the eye bell.
Power and Range Correlations
Here are some advised scope power settings and the ranges where they may be efficiently used. Highly magnified rifle scope glass will not be as useful as lower magnification level scopes since too much magnification can be a negative aspect depending on your shooting distance. The exact same concept relates to longer ranges where the shooter needs sufficient power to see precisely where to properly aim the rifle at the target.
Info on Lens Finishing
All contemporary rifle optic lenses are layered. There are different types and qualities of glass finishes. When shopping for luxury rifle optics and scope devices, Lens finishing can be an important aspect of defining the rifle’s capability. The glass lenses are among the most crucial parts of the optic since they are what your eye looks through while sighting a rifle in on the point of impact. The finishing on the lenses shields the lens surface and assists with anti glare capabilities from refracted direct sunlight and color discernibility.
HD Versus ED Lenses
Some scope producers likewise use “HD” or high-definition lens finishings which use different techniques, chemicals, components, and polarizations to draw out different colors and viewable quality through the lens. Some scope manufacturers use “HD” to refer to “ED” meaning extra-low dispersion glass.
Single Rifle Scope Lens Finishing Versus Multi-Coating
Different optic lenses can likewise have different finishings used 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 offer protection to the lens from scratches while minimizing glare and other less advantageous things experienced in the shooting environment while sighting in with the scope. The quality of a single covered lens depends on the scope maker and how much you paid for it.
Some scope makers also make it a point to specify if their optic lenses are covered or “multi” covered. This suggests the lens has multiple treatments applied to them. If a lens receives numerous treatments, it can show that a company is taking numerous steps to fight various environmental aspects like an anti-glare coating, a scratch resistant anti-abrasion finish, followed by a hydrophilic finish. This additionally doesn’t necessarily indicate the multi-coated lens will perform much better than a single coated lens. Being “better” depends upon the producer’s lens treatment techniques and the quality of components used in building the rifle scope.
Anti-water Lens Finishing
Water on a scope’s lens does not assist with preserving a clear sight picture through an optic at all. Numerous top of the line or high-end optic manufacturers will coat their lenses with a hydrophobic or hydrophilic finish. The Steiner Optics Nano-Protection is a fine example of this sort of treatment. It deals with the surface of the Steiner glass lens so the water molecules can not bind to it or create surface tension. The outcome is that the water beads sheet off of the scope to maintain a clear, water free sight picture.
Options for Installing Rifle Glass on Long Guns
Mounting options for scopes can be found in a couple of options. There are the basic scope rings which are separately mounted to the optic and one-piece mounts which cradle the scope. These various types of mounts also generally come in quick release variations which use throw levers which permit rifle operators to quickly mount and remove the scope.
Rifle Optic Mounting Solutions with Hex Key Rings
Basic, clamp-on design mounting optic rings use hex head screws to fix to the flattop style Picatinny scope mounting rails on rifles. These styles of scope mounts use double separate rings to support the scope, and are normally made from 7075 T6 billet aluminum which are manufactured for far away precision shooting. This form of scope mount is excellent for rifles which need to have a resilient, rock solid mount which will not change despite just how much the scope is moved or jarring the rifle takes. These are the type of mounts you want for a devoted scope setup on a long distance hunting or tournament firearm which will hardly ever need to be altered or adjusted. Blue 242 Loctite threadlocker can also be used on screws to stop the hex screws from backing out after they are mounted firmly in place. An example of these mounting rings are the 30mm style made by the Vortex Optics brand. The set usually costs around $200 USD
Quick-Release Cantilever Scope Rings
These kinds of quick-release rifle scope mounts can be used to quickly take off a scope from a rifle and reattach it to a different rifle. If they all use a similar style mount, a number of scopes can often be swapped in the field. The quick detach mount style is CNC crafted from anodized 6061 T6 aluminum and the mounting levers attach firmly to a flat top design Picatinny rail. This enables the scope to be sighted in while on the rifle, taken off of the rifle, and remounted while maintaining the original sighting settings. These types of mounts come in handy for rifles which are hauled around a lot, to remove the optic from the rifle for protection, or for sight systems which are employed in between multiple rifles. An example of this mount type is the 30mm mount from Vortex Optics. It generally costs around $250 USD
Details on Optic Tube Sealing and Gas Purging
Wetness inside your rifle scope can ruin a day of shooting and your pricey optic by triggering fogging and creating residue inside of the scope tube. Many scopes prevent moisture from getting in the scope tube with a system of sealing O-rings which are water resistant.
Glass Gas Purging
Another element 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 already occupied by the gas, the scope is less affected by temp shifts and pressure differences from the outdoor environment which could potentially allow water vapor to leak in around the seals to fill the void which would otherwise exist. These are good qualities of a decent rifle scope to look for.