Description
Rifle Scope Product Details
NcSTAR NC Star SFB3940BT, Shooter I Series 3-9×40 Tanx 40mm/Weavr Rings
3-9×40 P4 Sniper full size scope – tan – 3-9x variable power magnification – multi-coated lens – reticle quick focus Ocular bell housing with lock ring – one piece aluminum main tube – durable tan powder coated aluminum body – airgun reverse recoil compatible – includes lens covers and tan scope rings. Specifications: – magnification: 3x – 9x – reticle: Plex – tube diameter.: 1″ – objective lens: 40mm – eye relief: 2.8″ – 3.3″ – exit Pupil: 13.3mm – 4.4mm – click value: 1/4″ – lens coating: Blue – body color: tan powder coated finish – length: 12.2″ – weight: 16.1 oz.
Rifle Scope Product Features
3-9x variable power magnification
Multi-coated lens
Reticle quick focus ocular bell housing with lock ring
About the NcSTAR Scope Maker
NcSTAR is a premium supplier for firearm scopes, optics, mounts, and other accessories used for guns like rifles and long guns. They create and manufacture their mounts, scopes, and related products by choosing building materials which are long lasting and durable. This includes the NcSTAR NC Star SFB3940BT, Shooter I Series 3-9×40 Tanx 40mm/Weavr Rings by NcSTAR. For more shooting goods, visit their site.
About Rifle Glass
Rifle scopes permit you to specifically aim a rifle at various targets by aligning your eye with the target over a range. They do this through magnification by making use of a series of lenses within the scope. The scope’s alignment can be dialed in for the consideration of numerous natural considerations like wind speed and elevation decreases to make up for bullet drop.
The scope’s purpose is to understand exactly where the bullet will land based on the sight picture you are viewing using the scope as you align the scope’s crosshair or reticle with the target. The majority of modern-day rifle scopes and optics have about 11 parts which are arranged within and on the exterior of the scope. These 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 scopes.
The Varieties of Rifle Scopes
Rifle scopes can be either “first focal plane” or “second focal plane” type of scopes. Opting for the best type of rifle glass depends on what type of shooting you plan to do.
Info About First Focal Plane Optics
Focal plane scopes (FFP) come with the reticle in front of the zoom lens. This induces the reticle to increase in size based on the extent of magnification being used. The result is that the reticle measurements are the same at the amplified range as they are at the non magnified distance. For instance, one tick on a mil-dot reticle at one hundred yards without having “zoom” is still the very same tick at one hundred yards with 5x “zoom”. These types of scopes work for:
- Quick acquisition, long distance kinds of shooting
- Shooting situations where computations are minor
- Experienced shooters who recognize their target “hold over” and “lead” relationships for their rifles
- Shooters who do not mind the reticle is bigger and requires more visual eyesight room than a SFP reticle
About Second Focal Plane Optics
Second focal plane optics (SFP) come with 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.
- Long distance kinds of shooting where shooters have increased time to make ballistic calculations
- Shooting where most shots take place within shorter distances and ranges
- Shooters who would like a clearer optic sight picture without space used up by the larger sized FFP reticle
Rifle Optic Magnification
The measure of scope magnification you require is based on the style of shooting you wish to do. Nearly every style of rifle optic gives some amount of zoom. The amount of zoom a scope delivers is identified by the dimension, thickness, and curves of the lens glass inside of the rifle scope. The zoom of the optic is the “power” of the opic. This suggests what the shooter is looking at through the scope is amplified times the power aspect of what can typically be seen by human eyes.
Fixed Single Power Lens Optic Info
A single power rifle optic and scope uses a zoom number designator like 4×32. This suggests the magnification power of the scope is 4x power and the objective lens is 32mm. The zoom of this type of optic can not change given that it is a fixed power scope.
About Variable Power Lens Optics
Variable power rifle scopes can be changed between magnification increments. It will note the magnification degree in a configuration such as 2-10×32. These numbers indicate the magnification of the scope can be changed between 2x and 10x power. This additionally incorporates the power levels in-between 2 and 10. The power manipulation is achieved by operating the power ring part of the scope near the rear of the scope by the eye bell piece.
Power Levels and Range
Here are some advised scope power settings and the ranges where they can be successfully used. Highly magnified scopes will not be as useful as lower magnification rifle scope glass given that too much zoom can be a bad thing. The very same idea relates to extended distances where the shooter needs to have increased power to see precisely where to properly aim the rifle at the target.
Details on Lens Coverings
All contemporary rifle optic and scope lenses are covered in special coatings. There are different types and qualities of glass finishes. Lens covering is an essential aspect of a rifle when looking into high end rifle optics and scope equipment. The lenses are among the most vital parts of the scope due to the fact that they are what your eye looks through while sighting a rifle in on the target. The finishing on the lenses safeguards the lens surface as well as assists with anti glare from refracted sunshine and color recognition.
ED Versus HD Rifle Scopes
Some scope makers likewise use “HD” or high-definition lens finishes which use different techniques, chemicals, aspects, and polarizations to draw out different colors and viewable definition through the lens. Some scope makers use “HD” to refer to “ED” meaning extra-low dispersion glass.
Single Finishing Versus Multi-Coating for Scopes
Various optic lenses can likewise have different finishes applied to them. All lenses normally have at least some type of treatment or coating applied to them before they are used in a rifle scope or optic.
Single layered lenses have a treatment applied to them which is normally a protective and boosting multi-purpose treatment. This lens treatment can safeguard the lens from scratches while minimizing 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 producer and how much you spent paying for it. The scope’s maker and cost are indications of the lens quality.
Some scope makers similarly make it a point to specify if their optic lenses are coated or “multi” coated. Being “better” depends on the producer’s lens treatment technology and the quality of products used in building the rifle scope.
Hydrophobic Rifle Glass Lens Finishing
Water on a lens does not assist with keeping a clear sight picture through a scope at all. Lots of top of the line and military grade scope makers will coat their lenses with a hydrophobic or hydrophilic coating.
Rifle Optic Mounting Options
Installing options for scopes come in a couple of 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 generally can be found in quick release variations which use throw levers which permit rifle shooters to rapidly install and remove the scope.
Hex Key Scope Ring Mounts
Normal, clamp design mounting scope rings use hex head screws to mount to the flattop style Picatinny scope mount rails on rifles. These types of scope mounts use a couple of separate rings to support the optic, and are often made from 7075 T6 billet aluminum which is designed for long range accuracy shooting. This type of scope mount is great for rifles which need a durable, rock solid mount which will not move no matter how much the scope is moved or abused.
Optic Mounts with Quick-Release Cantilever Rings
These kinds of quick-release rifle scope mounts can be used to rapidly detach a scope from a rifle and reattach it to a different rifle. If they all use a similar design mount, multiple scopes can often be switched out. The quick detach mount style is CNC crafted from anodized 6061 T6 aluminum and the mounting levers attach securely to a flat top style Picatinny rail. This enables the scope to be sighted in while on the rifle, taken off of the rifle, and remounted back on the rifle while retaining precision. These types of mounts come in handy for shooting platforms which are moved around a lot, to take off the glass from the rifle for protection, or for sight systems which are employed between several rifles. An example of this mount type is the 30mm mount designed by the Vortex Optics brand. It typically costs around $250 USD
Sealing and Gas Purging for Rifle Scope Tubes
Wetness inside your rifle scope can spoil a day of shooting and your expensive optic by causing fogging and producing residue within the scope tube. Many optics prevent wetness from going into the scope tube with a system of sealing O-rings which are water resistant. Typically, these optics can be immersed within 20 or 30 feet of water before the water pressure can force moisture past the O-rings. This should be ample moisture avoidance for basic use rifles for hunting and sporting purposes, unless you plan on taking your rifle on boats and are concerned about the scope still performing if it is submerged in water and you can still retrieve the rifle.
Details on Rifle Optic Tube Gas Purging
Another component of avoiding the buildup of moisture within the rifle optic’s tube is filling the tube with a gas like nitrogen. Because this space is currently taken up by the gas, the optic is less influenced by condition shifts and pressure differences from the outdoor environment which might potentially enable water vapor to permeate in around the seals to fill the vacuum which would otherwise be there. These are good qualities of a good rifle scope to look for.
