Description
Rifle Scope Product Details
U.S. Optics FDN-25X Riflescope, 5-25x52mm, 34mm Tube, FFP, IGR Reticle, 1/10 MIL FDN 25X IGR
U.S. Optics FDN-25X Riflescope, 5-25x52mm, 34mm Tube, FFP, IGR Reticle, 1/10 MIL Elevation/ Windage Adjustment, Black, Medium, FDN 25X IGR
Rifle Scope Product Features
U.S. Optics FDN-25X Riflescope
5-25x52mm, 34mm Tube
FFP, IGR Reticle
1/10 MIL FDN 25X IGR
About the U.S. Optics Brand
U.S. Optics is a premium maker for rifle scopes, optics, mounting solutions, and other accessories used for guns like rifles and long guns. They style and supply 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, IGR Reticle, 1/10 MIL FDN 25X IGR by U.S. Optics. For additional shooting goods, visit their site.
What You Need to Know About Optics
Rifle scopes allow you to exactly align a rifle at different targets by lining up your eye with the target over a range. They accomplish this through magnifying the target using a set of lenses within the scope. The scope’s positioning can be adapted to account for many ecological considerations 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 on the sight picture you are seeing via the scope as you align the scope’s crosshair or reticle with the intended point of impact. Many modern rifle scopes and optics have about eleven parts which are located within and outside of the scope. These optic pieces consist of the rifle scope’s body, lenses, adjustment turrets, focus rings, and other components. See all eleven parts of an optic.
The Varieties of Rifle Scopes
Rifle scopes can be either “first focal plane” or “second focal plane” type of scopes. Selecting the finest type of rifle scope depends on what type of shooting you plan on doing.
About First Focal Plane Optics
Focal plane scopes (FFP) include the reticle in front of the zoom lens. These styles of scopes are useful for:
- Quick acquisition, far away kinds of shooting
- Shooting scenarios where computations are small
- Experienced shooters who have an idea for their aim point “hold over” and “lead” equations for their firearms
- Shooters who do not mind the reticle is enlarged and requires more visual sight area than a SFP reticle
Second Focal Plane Scope Info
Second focal plane scopes (SFP) include 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 reticle measurement.
- Long distance forms of shooting where shooters have additional time to make ballistic calculations
- Shooting where most of the shots take place within much shorter proximities and ranges
- Shooters who select a clearer optic sight picture with less space taken up by the enlarged FFP reticle
Rifle Glass Magnification
The amount of zoom a scope offers is determined by the diameter, density, and curvatures of the lenses inside of the rifle scope. The magnification of the scope is the “power” of the scope.
About Fixed Single Power Lens Glass
A single power rifle optic will have a magnification number designator like 4×32. This means the zoom power of the scope is 4x power and the objective lens is 32mm. The magnification of this type of optic can not fluctuate considering that it is set from the factory.
Adjustable Power Lens Rifle Optic Info
Variable power rifle scopes have adjustable power. These types of scopes will list the magnification level in a configuration like 2-10×32. These numbers indicate the zoom of the scope can be adjusted between 2x and 10x power. This additionally incorporates the powers in-between 2 and 10. The power shift is accomplished by applying the power ring part of the scope near the rear of the scope by the eye bell.
The Power Level and Range Correlation of Glass
Here are some advised scope power levels and the distances where they could be effectively used. Always remember that high power scopes will not be as effective as lower powered optics and scopes since increased magnification can be a bad thing. The same applies to longer ranges where the shooter needs to have enough power to see exactly where to properly aim the rifle at the target.
Lens Finishing for Glass
All modern-day rifle scope and optic lenses are covered in special coatings. There are various types and qualities of glass finishes. When thinking about luxury rifle targeting systems, Lens finishing can be a very important element of a rifle. The lenses are one of the most critical parts of the optic considering they are what your eye looks through while sighting a rifle in on the target. The covering on the lenses offers protection to the lens surface as well as helps with anti glare from refracted sunshine and color profiles.
HD Versus ED Scope Lens Coatings
Some rifle scope suppliers even use “HD” or high-def lens finishings that employ various procedures, rare earth compounds, polarizations, and elements to draw out various colors and viewable target visibility through the lens. This high-def covering is typically used with greater density glass which decreases light’s capability to refract through the lens glass. Some scope producers use “HD” to describe “ED” signifying extra-low dispersion glass. ED deals with how colors are represented on the chromatic spectrum and the chromatic difference or aberration which is similarly called color distortion or fringing. Chromatic aberration may be obvious over objects with hard edges and outlines as light hits the item from particular angles.
Single Covering Versus Multi-Coating for Glass
Different optic lenses can also have different finishes applied to them. All lenses normally have at least some type of treatment or finishing used to them before being used in a rifle scope or optic.
Single covered lenses have a treatment applied to them which is normally a protective and boosting multi-purpose treatment. This lens treatment can protect the lens from scratches while minimizing glare and other less useful things experienced in the shooting environment while sighting in with the scope. The quality of a single coated lens depends on the scope company and how much you spent on it. The scope’s maker and cost are indicators of the lens quality.
Some scope makers also make it a point to define if their optic lenses are layered or “multi” covered. This implies the lens has had several treatments applied to the surfaces of the glass. If a lens receives several treatments, it can establish that a maker is taking numerous steps to fight different environmental elements like an anti-glare coating, a scratch resistant anti-abrasion coating, followed by a hydrophilic covering. This also does not necessarily imply the multi-coated lens is much better than a single covered lens. Being “better” hinges on the maker’s lens treatment solutions and the quality of materials used in developing the rifle optic.
Hydrophobic Rifle Optic Lens Covering
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 optic companies will coat their lenses with a hydrophilic or hydrophobic covering which is water repellent.
Alternatives for Mounting Glass on Long Guns
Installing approaches for scopes can be found in a few options. There are the standard scope rings which are individually mounted to the scope and one-piece mounts which cradle the scope. These different kinds of mounts also normally are made in quick release variations which use manual levers which permit rifle operators to rapidly install and dismount the scope.
Hex Key Scope Rings
Standard, clamp design mounting scope rings use hex head screws to mount to the flattop style Picatinny scope installation 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 designed for long distance accuracy shooting. This type of scope install is great for rifles which require a long lasting, sound mounting solution which will not move no matter how much the scope is moved or abused.
Quick-Release Cantilever Scope Ring Mounts
These kinds of quick-release rifle scope mounts can be used to rapidly connect and remove a scope from a rifle. Multiple scopes can also be swapped 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 connect firmly to a flat top design Picatinny rail. This allows the scope to be sighted in while on the rifle, taken off of the rifle, and remounted while retaining precision. These kinds of mounts are useful and beneficial for rifles which are shipped a lot, to take off the scope from the rifle for protection, or for aiming systems which are adopted in between numerous rifles. An example of this mount type is the 30mm mount designed by Vortex Optics. It generally costs around $250 USD
Sealing and Gas Purging for Glass Tubes
Wetness inside your rifle scope can mess up a day of shooting and your expensive optic by bringing about fogging and developing residue inside of the scope tube. Most scopes avoid moisture from going into the scope tube with a system of sealing O-rings which are waterproof.
Gas Purged Scope Tubes
Another part of preventing the buildup of wetness inside of the rifle scope’s tube is filling the tube with a gas like nitrogen. Given that this space is currently occupied by the gas, the optic is less altered by condition alterations and pressure differences from the outside environment which might possibly permit water vapor to leak in around the seals to fill the void which would otherwise exist. These are good qualities of a good rifle scope to seek out.
