Description
Rifle Scope Product Details
PRESMA Eagle Series 3-12X44mm Precision Riflescope
Get precise shooting from a more agile scope. Measures only 10.8″ in length to be more agile and lighter than other scopes; Fully multi-coated lenses with advantage solution for maximum light transmission; Red, Green, and Blue illuminated Round X range estimating reticle with 11 levels of intensity; Illumination adjustment memorizes last level of selection; 30mm aircraft-grade aluminum tube with scratch-resistant hard-coat anodized black-matte finish; Built on a strong cardan-joint platform to handle demanding use; Nitrogen-filled and sealed; 100% waterproof, fogproof, shockproof; Zero locking windage and elevation adjustments; Includes 2.5″ sunshade and flip open lens covers; Limited lifetime manufacturer’s warranty; Magnification: 3X – 12X; Diopter Range: -2.75 / +2.25; FOV @ 100 yds: 7.6 – 2 deg; Exit Pupil: 14 – 3.6; Eye Relief: 3.25″ – 3.5″; Adjustment: 1/4″ M.O.A.; Windage / Elevation: Zero Locking; Adj Range: 35; Length: 10.8″; Weight: 16.1 oz.; Finish: Matte; Focal Plane: 2nd; Warranty: Limited Lifetime Manufacturer’s; Mfg. Number: PREA021.
Rifle Scope Product Features
Superior Quality Multi-Coated Optics for Reduction of Glare and Reflection, While Maximizing Light Transmission for Ultimate Image Brightness and clarity from Edge to Edge
Red, Green and Blue lluminated Color Mil-Dot Range Finding Reticle with Quick-Reaching Button Operations and Last Active Color Memory Function, Along with Auto Off to Save Battery Life
QTA (Quick Tactical Adjustment) tactical turrets with precise 1/4″ MOA click value for Wind and Elevation Adjustment
Constructed with single piece of premium Aircraft-Grade Aluminum Alloy with 1″ tube diameter body, Cardan joint design, hardened Anodized Black Matte finish for its durability
Argon filled scope housing, completely sealed with o-ring, making scope Shockproof, Waterproof, and Fog proof, Lifetime Warranty
About the Presma Brand
Presma is a premium maker for rifle scopes, optics, mounts, and other accessories used for guns like rifles and long guns. They create and manufacture their scopes, mounts, and related products by applying materials which are long lasting and durable. This includes the PRESMA Eagle Series 3-12X44mm Precision Riflescope by Presma. For additional shooting products, visit their site.
What You Need to Know About Rifle Glass
Rifle scopes enable you to exactly aim a rifle at various targets by aligning your eye with the target at range. They accomplish this through magnification by making use of a set of lenses inside the scope. The scope’s alignment can be adjusted for the consideration of separate environmental elements like wind speed and elevation increases to make up for bullet drop.
The scope’s function is to help the shooter understand exactly where the bullet will land based upon the sight picture you are seeing using the scope as you align the scope’s crosshair or reticle with the intended point of impact. Many contemporary rifle optics have about eleven parts which are arranged within and externally on the optic. These optic pieces include the rifle scope’s body, lenses, windage dials or turrets, objective focus rings, and other parts. Learn about the eleven parts of scopes.
About Optic Varieties
Rifle scopes can be either “first focal plane” or “second focal plane” type of scopes. The style of focal plane a scope has identifies where the reticle or crosshair lies in connection with the optic’s magnification. It literally means the reticle is behind or before the magnification lens of the scope. Deciding on the most reliable type of rifle glass depends upon what sort of shooting you plan on undertaking.
Info About First Focal Plane Optics
Focal plane scopes (FFP) include the reticle in front of the magnification lens. These types of scopes are beneficial for:
- Quick acquisition, long distance kinds of shooting
- Shooting circumstances where computations are small
- Experienced shooters who know their target “hold over” plus “lead” relationships for their rifles
- Shooters who don’t mind the reticle is enlarged and uses up more visual eyesight space than a SFP reticle
About Second Focal Plane Glass
Second focal plane optics (SFP) include the reticle to the rear of the zoom lens. In the FFP example with the SFP scope, the 5x “zoom” 100 yard tick measurement would be 1/5th of the non “zoom” tick measurement.
- Far away types of shooting where shooters have increased time to make ballistic calculations
- Shooting where most of the shots happen within much shorter ranges and proximities
- Shooters who select a clearer optic picture without room used up by the bigger FFP reticle
Rifle Glass Zoom
The amount of scope zoom you require is based on the kind of shooting you like to do. Practically every type of rifle glass offers some degree of magnification. The quantity of magnification a scope delivers is determined by the dimension, thickness, and curves of the lens glass within the rifle scope. The magnification level of the scope is the “power” of the scope. This suggests what the shooter is observing through the scope is magnified times the power element of what can usually be seen by human eyes.
Info About Fixed Power Lens Rifle Scopes
A single power rifle scope and optic uses a magnification number designator like 4×32. This implies the magnification power of the scope is 4x power and the objective lens is 32mm. The magnification of this kind of scope can not fluctuate because it is a set power scope.
Variable Power Lens Rifle Scopes
Variable power rifle scopes use variable power levels. The power change is handled by the power ring part of the scope near the back of the scope by the eye bell.
Power Levels and Range Correlations
Here are some recommended scope power settings and the ranges where they can be successfully used. High power optics will not be as efficient as lower magnification level glass due to the fact that too much magnification can be a negative aspect depending on your shooting distance. The same relates to longer ranges where the shooter needs adequate power to see precisely where to best aim the rifle.
Lens Finishing for Rifle Glass
All top teir rifle glass lenses are covered. Lens coating can be a significant aspect of a shooting system when considering high end rifle optics and scope systems.
HD Versus ED Scope Lens Coatings
Some rifle scope suppliers will also use “HD” or high-definition glass finishes that make the most of various procedures, polarizations, components, and chemicals to enhance different color ranges and viewable definition through lenses. This high-def finish is normally used with more costly, high density glass which drops light’s ability to refract through the lens glass. Some scope manufacturers use “HD” to describe “ED” signifying extra-low dispersion glass. ED handles how certain colors are represented on the chromatic spectrum and the chromatic aberration or difference which is similarly called color distortion or fringing. Chromatic aberration can be visible over items with hard outlines as light hits the item from specific angles.
Single Finish Versus Multi-Coating
Various scope lenses can even have various finishes 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. Since the lens isn’t just a raw piece of glass, they require performance enhancing coatings. It becomes part of the carefully tuned optic. It requires a coating to be applied to it so that it will be efficiently functional in many types of environments, degrees of light (full light VS shaded), and other shooting conditions.
This lens treatment can protect the lens from scratches while reducing glare and other less helpful 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 likewise make it a point to define if their optic lenses are covered or “multi” covered. This means the lens has numerous treatments applied to them. If a lens receives several treatments, it can indicate that a maker is taking several actions to fight various natural aspects like an anti-glare covering, a scratch resistant anti-abrasion finish, followed by a hydrophilic covering. This also doesn’t necessarily imply the multi-coated lens is much better than a single covered lens. Being “much better” depends upon the manufacturer’s lens treatment innovation and the quality of materials used in building the rifle glass.
Info on Anti-water Finishing
Water on a lens does not help with maintaining a clear sight picture through a scope at all. Many top of the line and military grade optic makers will coat their lenses with a hydrophobic or hydrophilic anti-water finishing.
Options for Installing Rifle Scopes on Long Guns
Mounting options for scopes are available 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 various types of mounts also typically come in quick release versions which use throw levers which permit rifle operators to rapidly mount and remove the glass.
Hex Key Optic Ring Mounts
Normal, clamp design mounting scope rings use hex head screws to mount to the flattop design Picatinny scope mount rails on rifles. These types of scope mounts use a couple of separate rings to support the optic, and are made from 7075 T6 billet aluminum which are developed for long distance precision shooting. This type of scope install is excellent for rifles which need a resilient, rock solid mounting solution which will not move no matter how much the scope is moved or abuse the rifle takes.
Quick-Release Cantilever Glass Rings
These types of quick-release rifle scope mounts can be used to rapidly detach a scope and attach it to a different rifle. Several scopes can also be swapped out if they all use a similar style mount. These types of mounts come in handy for rifle platforms which are transported a lot, to swap out the optic from the rifle for protecting the scope, or for scopes which are used between multiple rifles.
Optic Tube Sealing and Gas Purging
Wetness inside your rifle glass can spoil a day of shooting and your costly optic by resulting in fogging and making residue within the scope’s tube. Many optics protect against humidity from going into the scope tube with a series of sealing O-rings which are water resistant. Normally, these water-resistant scopes can be immersed under 20 or 30 feet of water before the water pressure can force moisture past the O-rings. This should be sufficient moisture content prevention for basic use rifles, unless you anticipate taking your rifle boating and are concerned about the optic still functioning if it goes over the side and you can still rescue the rifle.
Details on Optic Tube Gas Purging
Another element of avoiding the buildup of wetness inside of the rifle scope’s tube is filling the tube with a gas like nitrogen. Because this space is currently occupied by the gas, the scope is less affected by condition alterations and pressure distinctions from the outside environment which could potentially permit water vapor to seep in around the seals to fill the void which would otherwise exist. These are good qualities of a decent rifle scope to look for.
