Description
Rifle Scope Product Details
Presma Eagle Series 4-16x40mm AO Precision Riflescope
Presma Eagle Series Precision Riflescope, 4-16x40mm, Front Adjustable Objective Lens, Black PREA011
Rifle Scope Product Features
Pro Eagle Series 4-16X40 Precision Rifle Scope with Lifetime Warranty
CNC Machined Single Piece Aircraft-Grade Aluminum Alloy with Hard Coat Anodized Black Matte Finish
Fully Multi-Coated Crystal Glass Optics for Ultimate Light Transmission, Brightness and Clarity of Image
100% Waterproof & Fogproof and Shockproof and 11 Level of Brightness Red, Green, Blue Illuminated Reticle
Level bubble, electronic button switch, flip up lens cover, front AOL
About the Presma Company
Presma is a premium manufacturer for firearm scopes, optics, mounts, and other add-ons used for guns like rifles and long guns. They design and make their scopes, mounts, and related products by using building materials which are resilient and long lasting. This includes the Presma Eagle Series 4-16x40mm AO Precision Riflescope by Presma. For more shooting items, visit their site.
What You Need to Know About Rifle Scopes
Rifle scopes enable you to exactly align a rifle at different targets by aligning your eye with the target over a distance. They do this through zoom using a set of lenses within the scope. The scope’s positioning can be adapted to take into account different ecological aspects like wind speed and elevation increases to make up for bullet drop.
The scope’s function is to help shooters understand exactly where the bullet will hit based upon the sight picture you are viewing using the scope as you align the scope’s crosshair or reticle with the target. A lot of contemporary rifle optics have about 11 parts which are arranged inside and on the exterior of the optic. These optic pieces include the rifle scope’s body, lenses, adjustment dials, objective focus rings, and other elements. See all eleven parts of optics.
The Varieties of Rifle Scopes
Rifle scopes can be either “first focal plane” or “second focal plane” type of optics. Picking the perfect type of rifle glass is based around what type of shooting you plan to do.
Info on First Focal Plane Scopes
First focal plane scopes (FFP) come with the reticle ahead of the magnifying lens. This causes the reticle to increase in size based upon the level of zoom being used. The outcome is that the reticle measurements are the same at the enhanced distance as they are at the non amplified distance. For example, one tick on a mil-dot reticle at 100 yards without “zoom” is still the same tick at 100 yards using 5x “zoom”. These kinds of scopes are beneficial for:
- Quick acquisition, long distance types of shooting
- Shooting scenarios where estimations are low
- Experienced shooters who know their aim point “hold over” and “lead” equations for their rifles
- Shooters who don’t mind the reticle is bigger and requires more visual sight room than a SFP reticle
About Second Focal Plane Glass
Second focal plane optics (SFP) feature 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.
- Far away styles of shooting where shooters have increased time to make ballistic computations
- Shooting where most shots take place within much shorter spaces and ranges
- Shooters who select a clearer optic sight picture without room taken up by the bigger FFP reticle
Details on Rifle Optic Magnification
The amount of zoom a scope provides is figured out 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.
Single Power Lens Rifle Optics
A single power rifle optic or scope will have a magnification number designator like 4×32. This indicates the zoom power of the scope is 4x power while the objective lens is 32mm. The zoom of this type of optic can not adjust considering that it is a set power scope.
Variable Power Lens Glass
Variable power rifle scopes can be modified between magnified levels. The power change is achieved by the power ring part of the scope near the rear of the scope by the eye bell.
Power Levels and Range Correlations
Here are some suggested scope power levels and the distances where they could be effectively used. Keep in mind that high magnification optics will not be as practical as lower magnification level optics and scopes since too much zoom can be a bad thing. The very same idea relates to longer ranges where the shooter needs to have adequate power to see where to properly aim the rifle at the target.
Info on Rifle Scope Lens Coverings
All modern rifle scope lenses are coated. There are different types and qualities of lens coatings. Lens finish is an essential element of a rifle when thinking of high-end rifle optics and targeting units. The glass lenses are among the most vital components of the optic considering that they are what your eye looks through while sighting a rifle in on the point of impact. The finish on the lenses safeguards the lens surface area as well as improves anti glare from refracted sunlight and color visibility.
HD Versus ED Rifle Optic Lens Coatings
Some scope producers likewise use “HD” or high-definition lens coatings which use different techniques, polarizations, aspects, and chemicals to draw out separate colors and viewable quality through the lens. Some scope producers use “HD” to refer to “ED” indicating extra-low dispersion glass.
Single Covering Versus Multi-Coating for Rifle Optics
Various optic lenses can likewise have different finishings used to them. All lenses normally have at least some type of treatment or coating used to them prior to being used in a rifle scope or optic.
Single covered lenses have a treatment applied to them which is typically a protective and improving multi-purpose treatment. This lens treatment can shield the lens from scratches while decreasing glare and other less helpful things experienced in the shooting environment while sighting in with the scope. The quality of a single layered lens depends on the scope designer and how much you spent paying for it. The scope’s maker and cost are indications of the lens quality.
Some scope manufacturers also make it a point to define if their optic lenses are layered or “multi” coated. This means the lens has numerous treatments applied to the surfaces. If a lens receives multiple treatments, it can establish that a company is taking numerous actions to combat different environmental elements like an anti-glare finish, a scratch resistant anti-abrasion coating, followed by a hydrophilic covering. This also does not always imply the multi-coated lens is much better than a single coated lens. Being “much better” is dependent on the manufacturer’s lens treatment techniques and the quality of glass used in building the rifle glass.
Hydrophobic Lens Coating
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 high-end optic companies will coat their lenses with a hydrophobic or hydrophilic coating.
Rifle Optic Installing Alternatives
Mounting approaches for scopes come in a few options. There are the standard scope rings which are separately mounted to the scope and one-piece mounts which cradle the scope. These different kinds of mounts also typically are made in quick release versions which use throw levers which permit rifle operators to rapidly mount and dismount the glass.
Hex Key Scope Rings
Basic, clamp design mounting optic rings use hex head screws to fix to the flattop design Picatinny scope mount rails on rifles. These varieties of scope mounts use a pair of separate rings to support the scope, and are normally constructed from 7075 T6 billet aluminum which are designed for long distance precision shooting. This type of scope mount is effective for rifles which are in need of a resilient, unfailing mount which will not shift no matter how much the scope is moved or jarring the rifle takes. These are the style of mounts you should have for a specialized scope setup on a reach out and touch someone scouting or hard target interdiction long gun that will hardly ever need to be changed or adjusted. Blue 242 Loctite threadlocker can additionally be used on the mount screws to protect against the hex screws from wiggling out after they are mounted tightly in place. An example of these rings are the 30mm type made by the Vortex Optics company. The set generally costs around $200 USD
Quick-Release Cantilever Glass Ring Mounting Solutions
These types of quick-release rifle scope mounts can be used to rapidly take off a scope and attach it to a different rifle. Several scopes can even be swapped out if they all use a similar style mount. These types of mounts are handy for long guns which are transferred a lot, to remove the optic from the rifle for protection, or for optics which are used in between multiple rifles or are situationally focused.
Rifle Glass Tube Sealing and Gas Purging
Moisture inside your rifle scope can wreck a day of shooting and your highly-priced optic by inducing fogging and making residue inside of the scope tube. Many scopes prevent wetness from getting in the optical tube with a series of sealing O-rings which are water resistant. Usually, these water-resistant scopes can be submerged under 20 or 30 feet of water before the water pressure can push moisture past the O-rings. This should be sufficient wetness avoidance for basic use rifles for hunting and sporting purposes, unless you anticipate taking your rifle aboard a watercraft and are concerned about the optic still performing if it goes over the side and you can still rescue the gun.
Rifle Scope Gas Purging
Another component of avoiding the accumulation 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 impacted by temperature level shifts and pressure variations from the external environment which might possibly permit water vapor to permeate in around the seals to fill the void which would otherwise be there. These are good qualities of a good rifle scope to seek out.
