Description
Rifle Scope Product Details
U.S. Optics FDN-25X Riflescope, 5-25x52mm, 34mm Tube, FFP, MDMOA Reticle, 1/10 MIL FDN 25X MDMOA
U.S. Optics FDN-25X Riflescope, 5-25x52mm, 34mm Tube, FFP, MDMOA Reticle, 1/10 MIL Elevation/ Windage Adjustment, Black, Medium, FDN 25X MDMOA
Rifle Scope Product Features
U.S. Optics FDN-25X Riflescope
5-25x52mm, 34mm Tube
FFP, MDMOA Reticle
1/10 MIL FDN 25X MDMOA
About the U.S. Optics Manufacturer
U.S. Optics is a premium manufacturer for weapon scopes, optics, mounts, and other add-ons used for guns like rifles and long guns. They innovate and make their products making the most of elements which are long lasting and durable. This includes the U.S. Optics FDN-25X Riflescope, 5-25x52mm, 34mm Tube, FFP, MDMOA Reticle, 1/10 MIL FDN 25X MDMOA by U.S. Optics. For additional shooting items, visit their site.
Optic Information
Rifle scopes enable you to precisely align a rifle at different targets by lining up your eye with the target at range. They do this through magnification by employing a series of lenses inside the scope. The scope’s positioning can be adjusted to take into account numerous natural things 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 on the sight picture you are viewing using the optic as you align the scope’s crosshair or reticle with the intended point of impact. Most contemporary rifle scopes and optics have about eleven parts which are arranged inside and outside of the optic. These parts consist of the rifle scope’s body, lenses, windage dials or turrets, objective focus rings, and other parts. See all eleven parts of scopes.
Rifle Glass Styles
Rifle scopes can be either “first focal plane” or “second focal plane” type of scopes. The type of focal plane a scope has determines where the reticle or crosshair is located in relation to the optic’s magnifying adjustments. It actually means the reticle is located behind or in front of the magnification lens of the scope. Selecting the most desired form of rifle optic depends on what kind of hunting or shooting you intend on undertaking.
Info on First Focal Plane Optics
First focal plane scopes (FFP) include the reticle ahead of the zoom lens. This causes the reticle to increase in size based on the amount of magnification being used. The benefit is that the reticle measurements are the same at the magnified range as they are at the non magnified distance. For instance, one tick on a mil-dot reticle at 100 yards without having “zoom” is still the corresponding tick at 100 yards using 5x “zoom”. These types of scopes are practical for:
- Quick acquisition, far away kinds of shooting
- Shooting scenarios where computations are minor
- Experienced shooters who understand their target “hold over” and also “lead” relationships for their long gun
- Shooters who don’t mind the reticle is enlarged and requires more visual eyesight room than a SFP reticle
About Second Focal Plane Scopes
Second focal plane optics (SFP) include the reticle to the rear of the zoom lens. This induces the reticle to remain at the very same overall size relative to the level of zoom being used. The outcome is that the reticle dimensions shift based on the zoom used to shoot over greater ranges considering that the reticle markings represent different increments which fluctuate with the magnification. In the FFP illustration with the SFP scope, the 5x “zoom” one hundred yard tick reticle measurement would be 1/5th of the non “zoom” tick. These particular varieties of optics work for:
- Long distance types of shooting where shooters have more time to make ballistic calculations
- Shooting where most of the shots occur within shorter proximities and ranges
- Shooters who choose a clearer optic picture with less room taken up by the larger sized FFP reticle
Rifle Optic Zoom
The level of scope zoom you require depends on the style of shooting you intend to do. Practically every kind of rifle scope supplies some amount of zoom. The amount of zoom a scope delivers is established by the size, density, and curves of the lens glass inside of the rifle optic. The magnifying level of the optic is the “power” of the opic. This signifies what the shooter is aiming at through the scope is amplified times the power aspect of what can generally be seen by human eyes.
Info on Fixed Power Lens Optics
A single power rifle scope or optic comes with a magnification number designator like 4×32. This implies the magnification power of the scope is 4x power while the objective lens is 32mm. The magnification of this type of scope can not change given that it is fixed.
Adjustable Power Lens Glass Info
Variable power rifle scopes can be adjusted between magnification power levels. It will list the magnification degree in a format like 2-10×32. These numbers imply the zoom of the scope could be changed in between 2x and 10x power. This also includes the power levels in-between 2 and 10. The power modification is achieved by operating the power ring part of the scope near the back of the scope by the eye bell.
The Power and Range of Rifle Glass
Here are some suggested scope power settings and the distances where they may be effectively used. Consider that higher power scopes will not be as efficient as lower powered optics and scopes due to the fact that too much zoom can be a detractor. The exact same idea applies to extended distances where the shooter needs to have adequate power to see exactly where to properly aim the rifle at the target.
Glass Lens Coating
All modern-day rifle scope and optic lenses are layered. There are different types and qualities of glass lens coverings. When looking at high end rifle targeting devices, Lens finish can be an important element of a rifle. The glass lenses are among the most crucial components of the glass considering that they are what your eye sees through while sighting a rifle in on the target. The finish on the lenses safeguards the lens surface and even improves anti glare from refracted natural light and color exposure.
Info on Optic Lens Coatings – HD Versus ED
Some optic suppliers even use “HD” or high-def lense finishes that employ various processes, rare earth compounds, elements, and polarizations to draw out different colors and viewable target visibility through lenses. This high-def coating is commonly used with increased density lens glass which brings down light’s chance to refract by means of the lens glass. Some scope makers use “HD” to refer to “ED” suggesting extra-low dispersion glass. ED handles how colors are represented on the chroma spectrum and the chromatic difference or aberration which is similarly called color distortion or fringing. Chromatic aberration can be obvious around items with hard outlines as light hits the object from specific angles.
Details on Single Finishing Versus Multi-Coating
Various scope lenses can even have different coverings applied to them. All lenses generally have at least some type of treatment or covering applied to them before they are used in a rifle scope or optic. This is since the lens isn’t simply a raw piece of glass. It is part of the carefully tuned optic. It needs to have a covering applied to it so that the lens will be efficiently usable in many kinds of environments, degrees of sunshine (full light VS shaded), and other shooting conditions.
This lens treatment can safeguard 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 layered lens depends on the scope maker and how much you paid for it.
Some scope producers also make it a point to specify if their optic lenses are layered or “multi” covered. This suggests the lens has multiple treatments applied to them. If a lens gets several treatments, it can establish that a company is taking multiple steps to fight various natural elements like an anti-glare coating, a scratch resistant anti-abrasion finish, followed by a hydrophilic finishing. This additionally does not necessarily indicate the multi-coated lens will perform better than a single covered lens. Being “better” depends upon the producer’s lens treatment innovation and the quality of products used in creating the rifle optic.
Info on Hydrophobic Coating
Water on a lens does not help with maintaining a clear sight picture through a scope at all. Lots of top of the line and military grade scope companies will coat their lenses with a hydrophilic or hydrophobic coating.
Alternatives for Installing Glass on Firearms
Installing approaches for scopes can be found in a couple of 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 kinds of mounts also typically can be found in quick release versions which use manual levers which permit rifle operators to quickly install and remove the scopes.
Hex Key Rifle Glass Ring Mounts
Normal, clamp style 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 two different rings to support the optic, and are made from 7075 T6 billet aluminum which are developed for long distance accuracy shooting. This type of scope mount is wonderful for rifles which require a long lasting, sound mounting solution which will not move no matter how much the scope is moved or abused.
Rifle Optic Mounting Solutions with Quick-Release Cantilever Rings
These kinds of quick-release rifle scope mounts can be used to rapidly connect and remove a scope from a rifle. A wide range of scopes can also be switched out if they all use a complementary style mount. The quick detach design is CNC machined from anodized 6061 T6 aluminum and the mounting levers attach nicely to a flat top style Picatinny rail. This enables the scope to be sighted in while on the rifle, removed from the rifle, and remounted while preserving precision. These kinds of mounts come in beneficial for shooting platforms which are transferred between vehicles a lot, to remove the scope glass from the rifle for protection, or for scopes which are used in between a number of rifles. An example of this mount type is the 30mm mount from the Vortex Optics brand. It normally costs around $250 USD
Sealing and Gas Purging for Glass Tubes
Moisture inside your rifle optic can mess up a day of shooting and your costly optic by triggering fogging and making residue within the scope’s tube. Many optics prevent wetness from getting in the optical tube with a system of sealing O-rings which are water resistant. Usually, these water resistant optics can be submerged underneath 20 or 30 feet of water before the water pressure can push moisture past the O-rings. This should be sufficient moisture prevention for conventional use rifles, unless you anticipate taking your rifle aboard a watercraft and are concerned about the scope still functioning if it goes over the side and you can still find the rifle.
Rifle Optic Gas Purging
Another element of avoiding the accumulation of moisture within the rifle optic’s tube is filling the tube with a gas like nitrogen. Given that this area is currently occupied by the gas, the scope is less affected by temp shifts and pressure distinctions from the external environment which might potentially allow water vapor to permeate in around the seals to fill the void which would otherwise exist. These are good qualities of a good rifle scope to seek out.
