Description
Rifle Scope Product Details
BARSKA 2.5×20 Contour 30/30 Reticle Riflescope
Specifications:2.5x, Field of View (ft@100yds/m@100m) =26.4/8.8@2.5x, Exit Pupil = 8mm, Eye Relief =5.9″, Click value = 1/4.
Rifle Scope Product Features
2.5x magnification with 20mm objective lens in a 100% waterproof and fogproof extra rigid shockproof construction
Fully coated optics with 30/30 reticle
Extremely long eye relief
Compact in size
Perfect for crossbow hunting, pistol shoting or simple rimfire
About the BARSKA Scope Maker
BARSKA is a premium supplier for rifle scopes, optics, mounts, and other components used for guns like rifles and long guns. They innovate and build their scopes, mounts, and related products by choosing elements which are resilient and long lasting. This includes the BARSKA 2.5×20 Contour 30/30 Reticle Riflescope by BARSKA. For additional shooting goods, visit their website.
Scope Info
Rifle scopes enable you to precisely aim a rifle at different targets by aligning your eye with the target at range. They do this through magnification by employing a set of lenses within the scope. The scope’s positioning can be adjusted to take into account separate natural aspects like wind and elevation 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 seeing using the scope as you align the scope’s crosshair or reticle with the target. A lot of modern rifle scopes and optics have about 11 parts which are located inside and on the exterior of the scope body. These optic pieces consist of the rifle scope’s body, lenses, adjustment dials or turrets, focus rings, and other elements. Learn about the eleven parts of glass.
The Styles of Rifle Scopes
Rifle scopes can be either “first focal plane” or “second focal plane” type of optics. Picking the best type of rifle optic is based on what type of shooting you plan to do.
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 scenarios where computations are very little
- Experienced shooters who have an idea for their aim point “hold over” and “lead” correlations for their rifles
- Shooters who don’t mind the reticle is enlarged and occupies more visual eyesight space than a SFP reticle
Second Focal Plane Scope Facts
Second focal plane scopes (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 would be 1/5th of the non “zoom” tick reticle measurement.
- Long distance kinds of shooting where shooters have increased time to make ballistic estimations
- Shooting where most shots occur within shorter distances and ranges
- Shooters who choose a clearer optic sight picture with less space taken up by the bigger FFP reticle
Ins and Outs of Rifle Glass Zoom
The amount of zoom a scope provides is determined by the size, density, and curvatures of the lenses inside of the rifle scope. The magnification of the scope is the “power” of the scope.
Fixed Single Power Lens Rifle Optics
A single power rifle optic and scope will have a zoom number designator like 4×32. This implies the zoom power of the scope is 4x power while the objective lens is 32mm. The magnification of this kind of scope can not adjust given that it is set from the factory.
Adjustable Power Lens Rifle Glass Facts
Variable power rifle scopes use variable power levels. The power adjustment is accomplished by the power ring part of the scope near the rear of the scope by the eye bell.
Scope Power and Ranges
Here are some suggested scope power levels and the ranges where they could be successfully used. Always remember that higher power optics and scopes will not be as practical as lower magnification level optics and scopes due to the fact that too much zoom can be a detractor. The very same idea applies to longer distances where the shooter needs to have adequate power to see where to properly aim the rifle at the target.
Details on Lens Finishing
All modern rifle optic lenses are coated. Lens coating is a vital element of a rifle system when purchasing high end rifle optics and scope equipment.
HD Versus ED Lenses
Some rifle scope manufacturers also use “HD” or high-def lens coatings which employ various procedures, aspects, rare earth compounds, and polarizations to enhance various color ranges and viewable target visibility through the lens. This high-def finish is typically used with more costly, high density glass which drops light’s opportunity to refract by means of the lens glass. Some scope corporations use “HD” to describe “ED” indicating extra-low dispersion glass. ED handles how certain colors are presented on the chroma spectrum and the chromatic aberration or difference which is also called color distortion or fringing. Chromatic aberration can be noticeable over objects with defined outlines as light hits the object from specific angles.
Single Finish Versus Multi-Coating
Different optic lenses can also have various coverings used 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 protect the lens from scratches while lowering glare and other less beneficial things experienced in the shooting environment while sighting in with the scope. The quality of a single covered lens depends on the scope manufacturer and how much you paid for it.
Some scope manufacturers also make it a point to specify if their optic lenses are covered or “multi” covered. Being “much better” depends on the manufacturer’s lens treatment technology and the quality of materials used in building the rifle scope.
Hydrophobic Rifle Scope Lens Finishing
Water on a lens doesn’t assist with maintaining a clear sight picture through a scope at all. Many top of the line and high-end scope makers will coat their lenses with a hydrophilic or hydrophobic coating.
Options for Installing Rifle Optics on Long Guns
Mounting approaches for scopes can be found in a few options. There are the basic scope rings which are individually installed to the scope and one-piece scope mounts which cradle the scope. These various types of mounts also normally come in quick release variations which use throw levers which permit rifle shooters to rapidly install and remove the scopes.
Hex Key Rifle Optic Ring Mounts
Standard, clamp type mounting scope rings use hex head screws to mount to the flattop style Picatinny scope mounting rails on the tops of rifles. These types of scope mounts use a pair of independent rings to support the scope, and are made from 7075 T6 billet aluminum which are designed for long distance precision shooting. This form of scope mount is effective for rifles which require a resilient, rock solid mount which will not move despite just how much the scope is moved or abuse the rifle takes. These are the design of mounts you want for a faithful scope setup on a reach out and touch someone hunting or sniper competition rifle which will hardly ever need to be changed or adjusted. Blue 242 Loctite threadlocker can additionally be used on the screws to protect against the hex screw threads from backing out after they are installed safely in place. An example of these mounting rings are the 30mm type 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 remove a scope from a rifle and reattach it to a different rifle. If they all use a comparable style mount, several scopes can also be swapped on the range. The quick detach design is CNC crafted from anodized 6061 T6 aluminum and the mounting levers attach tightly to a flat top style Picatinny rail. This lets the scope to be sighted in while on the rifle, removed from the rifle, and remounted while maintaining precision. These types of mounts are useful and practical for shooting platforms which are transferred a lot, to take off the scope glass from the rifle for protection, or for optics which are used in between a number of rifles. An example of this mount type is the 30mm mount designed by the Vortex Optics manufacturer. It typically costs around $250 USD
Sealing and Gas Purging for Glass Tubes
Moisture inside your rifle glass can ruin a day of shooting and your expensive optic by resulting in fogging and producing residue within the scope’s tube. Most scopes protect against moisture from entering the optical tube with a series of sealing O-rings which are waterproof. Typically, these scopes can be immersed within 20 or 30 feet of water before the water pressure can push moisture past the O-rings. This should be ample humidity avoidance for basic use rifles for hunting and sporting purposes, unless you anticipate taking your rifle on boats and are concerned about the scope still functioning if it is submerged in water and you can still recover the firearm.
Glass Gas Purging
Another element of avoiding the accumulation of wetness inside of the rifle scope’s tube is filling the tube with a gas like nitrogen. Because this area is currently taken up by the gas, the glass is less affected by temp changes and pressure variations from the external environment which might potentially enable water vapor to permeate in around the seals to fill the void which would otherwise exist. These are good qualities of a decent rifle scope to look for.
