Description
Rifle Scope Product Details
ARMSTAC Rifle Scope Eagle-I Variable Zoom 3-9×40 Hunting Scope with Lens Filter Caps with ARMSTAC
A variable zoom scope with 3x to 9x magnification with a 40mm objective lens. Includes protective lens filter caps held together with dual bungee slings. Scope mounting rings sold separately.
Rifle Scope Product Features
A variable zoom scope, 3-9X magnification, one-inch tube diameter, and 40-millimeter objective lens
Shooter Series scope is ideal for hunting and target shooting
Matte black finish; comes with lens covers, mount, and Weaver-style rings
Fully multi-coated lenses provide bright, sharp and clear images
Includes limited lifetime manufacturer’s warranty
About the ARMSTAC Company
ARMSTAC is a premium producer for rifle scopes, optics, mounts, and other add-ons used for guns like rifles and long guns. They innovate and make their scopes, mounts, and related products by using materials which are resilient and long lasting. This includes the ARMSTAC Rifle Scope Eagle-I Variable Zoom 3-9×40 Hunting Scope with Lens Filter Caps with ARMSTAC by ARMSTAC. For more shooting products, visit their website.
Information Optics
Rifle scopes enable you to specifically align a rifle at various targets by lining up your eye with the target at range. They accomplish this through zoom by utilizing a series of lenses inside the scope. The scope’s alignment can be adapted to take into account many natural elements like wind and elevation to account for bullet drop.
The scope’s function is to understand precisely where the bullet will land based upon the sight picture you are viewing through the optic as you align the scope’s crosshair or reticle with the intended point of impact. A lot of modern rifle optics have around eleven parts which are arranged within and outside of the optic. These parts include the rifle scope’s body, lenses, elevation turrets, focus rings, and other parts. Learn about the eleven parts of glass.
Rifle Scope Styles
Rifle scopes can be either “first focal plane” or “second focal plane” type of scopes. The type of focal plane an optic has identifies where the reticle or crosshair is located in connection with the optic’s magnification. It actually implies the reticle is situated behind or ahead of the magnifying lens of the optic. Picking out the most suitable kind of rifle scope is based on what kind of shooting or hunting you intend on undertaking.
First Focal Plane Glass Details
First focal plane optics (FFP) feature the reticle ahead of the zoom lens. This causes 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 amplified range as they are at the non amplified range. One tick on a mil-dot reticle at 100 yards with no “zoom” is still the same tick at 100 yards with 5x “zoom”. These kinds of scopes are valuable for:
- Quick acquisition, far away kinds of shooting
- Shooting scenarios where calculations are minor
- Experienced shooters who understand their aim point “hold over” plus “lead” equations for their long guns
- Shooters who don’t mind the reticle is bigger and takes up more visual eyesight room than a SFP reticle
Info on Second Focal Plane Optics
Second focal plane scopes (SFP) come with the reticle behind the magnification lens. In the FFP example with the SFP scope, the 5x “zoom” 100 yard tick reticle measurement would be 1/5th of the non “zoom” tick measurement.
- Long distance styles of shooting where shooters have more time to make ballistic calculations
- Shooting where most of the shots occur within shorter ranges and distances
- Shooters who like a clearer optic picture without space taken up by the larger size FFP reticle
Scope Zoom
The level of scope zoom you require depends on the type of shooting you want to do. Pretty much every kind of rifle glass gives some amount of zoom. The level of zoom a scope offers is determined by the dimension, density, and curvatures of the lens glass within the rifle optic. The magnification level of the optic is the “power” of the glass. This implies what the shooter is observing through the scope is magnified times the power factor of what can generally be seen by human eyes.
Fixed Single Power Lens Optics
A single power rifle scope or optic will have a zoom number designator like 4×32. This means the magnification power of the scope is 4x power and the objective lens is 32mm. The magnification of this type of scope can not change given that it is a set power scope.
Adjustable Power Lens Rifle Glass
Variable power rifle scopes can be adjusted between magnification power levels. It will list the magnification level in a format such as 2-10×32. These numbers mean the zoom of the scope can be changed in between 2x and 10x power. This always includes the powers in-between 2 and 10. The power adaptation is achieved by applying the power ring component of the scope near the back of the scope by the eye bell piece.
Power and Range Correlations
Here are some suggested scope power settings and the ranges where they could be efficiently used. Keep in mind that high power scopes and optics will not be as efficient as lower magnification level scopes due to the fact that too much magnification can be a bad thing. The very same idea goes for longer ranges where the shooter needs increased power to see exactly where to properly aim the rifle.
Info on Rifle Optic Lens Finishing
All top teir rifle glass lenses are covered. Lens coating is a crucial aspect of a shooting system when buying high end rifle optics and scope systems.
ED Versus HD Optics
Some glass makers even use “HD” or high-def lens finishes which apply various procedures, elements, chemical substances, and polarizations to draw out different color ranges and viewable target visibility through lenses. This high-definition finishing is frequently used with higher density glass which drops light’s chance to refract by means of the lens glass. Some scope manufacturers use “HD” to describe “ED” indicating extra-low dispersion glass. ED handles how colors are presented on the chroma spectrum and the chromatic aberration which is similarly called color distortion or fringing. Chromatic aberration may be noticeable over items with defined shapes as light hits the object from various angles.
Single Finishing Versus Multi-Coating
Various scope lenses can even have various coverings applied to them. All lenses normally have at least some type of treatment or finish applied to them prior to being used in a rifle scope or optic. This is due to the fact that the lens isn’t just a raw piece of glass. It is part of the finely tuned optic. It needs to have a finish placed on it so that the lens will be optimally usable in numerous types of environments, degrees of sunshine (full light VS shaded), and other shooting conditions.
This lens treatment can protect the lens from scratches while reducing glare and other less advantageous things experienced in the shooting environment while sighting in with the scope. The quality of a single layered lens depends on the scope maker and how much you paid for it.
Some scope manufacturers also make it a point to define if their optic lenses are covered or “multi” coated. Being “better” depends on the maker’s lens treatment technology and the quality of products used in developing the rifle scope.
Anti-water Rifle Scope Lens Covering
Water on a lens does not support preserving a clear sight picture through a scope at all. Lots of top of the line or high-end optic makers will coat their lenses with a hydrophilic or hydrophobic coating. The Steiner Optics Nano-Protection is a good example of this type of treatment. It provides protection for the surface of the Steiner scope lens so the water particles can not bind to it or develop surface tension. The result is that the water beads roll off of the scope to maintain a clear, water free sight picture.
Rifle Optic Mounting Choices
Mounting approaches for scopes can be found in a few options. There are the basic scope rings which are individually mounted to the optic and one-piece mounts which cradle the scope. These different kinds of mounts also normally are made in quick release versions which use throw levers which enable rifle shooters to rapidly mount and dismount the scope.
Hex Key Optic Ring Mounting Solutions
Basic, clamp-on style mounting optic rings use hex head screws to install to the flattop design Picatinny scope mounting rails on rifles. These forms of scope mounts use double independent rings to support the scope, and are normally made from 7075 T6 billet aluminum which are developed for long distance precision shooting. This form of scope mount is exceptional for rifle systems which require a long lasting, hard use mount which will not move regardless of how much the scope is moved or jarring the rifle takes. These are the type of mounts you should get for a dedicated scope system on a long distance hunting or hard target interdiction long gun which will rarely need to be modified or adjusted. Blue 242 Loctite threadlocker can additionally be used to prevent the hex screws from backing out after they are installed securely in position. An example of these rings are the 30mm type made by the Vortex Optics brand. The set normally costs around $200 USD
Quick-Release Cantilever Glass Rings
These types of quick-release rifle scope mounts can be used to rapidly remove a scope and connect it to a different rifle. Several scopes can also be switched out if they all use a compatible design mount. These types of mounts are convenient for long guns which are transported a lot, to remove the optic from the rifle for protecting the scope, or for scopes which are used between numerous rifles or are situationally focused.
Info on Glass Tube Sealing and Gas Purging
Wetness inside your rifle scope can wreck a day of shooting and your pricey optic by causing fogging and making residue inside of the scope’s tube. A lot of optics prevent moisture from getting in the optical tube with a series of sealing O-rings which are waterproof. Usually, these water-resistant optics can be submerged beneath 20 or 30 feet of water before the water pressure can push moisture past the O-rings. This should be sufficient moisture content prevention for common use rifles, unless you anticipate taking your rifle boating and are concerned about the scope still functioning if it is submerged in water and you can still recover the gun.
Gas Purged Glass Tubes
Another element of avoiding the buildup of wetness inside of the rifle scope’s tube is filling the tube with a gas like nitrogen. Considering that this space is currently occupied by the gas, the glass is less influenced by temperature level alterations and pressure variations from the outdoor environment which could possibly permit water vapor to permeate in around the seals to fill the vacuum which would otherwise be there. These are good qualities of a decent rifle scope to look for.
