Description
Rifle Scope Product Details
US Optics FDN 25x 5-25x52mm FFP Horus T-3 34mm Riflescope FDN-25X-T-3
When it comes to pushing the limits of your rifle, the US Optics Foundation 25X 5-25x52mm Riflescope is the optic you need! Built to meet the demands of professional and competitive long range shooters, the FDN 25X is ideal for pushing shots to 2000 yards and beyond through its superb optical clarity, brightness, and adjustment mechanics. Just like all of the scopes within the Foundation series, the FND 25X is built on a 34mm maintube that is precision machined from 6061-T6 Aluminum and features a magnification throw of 180° for rapid changes in magnification. The FND 25X is outfitted with US Optics’ ER3K elevation low-profile turret and ergonomic US #1 windage knobs ensuring fast and tactile adjustments in the field.
Rifle Scope Product Features
Matte Black Type III Hard Anodized Finish
Low Profile Elevation Turret with Zero Stop
6061-T6 Aluminum 34mm Main Tube
Integrated Illumination & Parallax Knob
About the U.S. Optics Scope Maker
U.S. Optics is a premium manufacturer for weapon scopes, optics, mounting solutions, and other add-ons used for firearms like rifles and long guns. They design and manufacture their scopes, mounts, and related products by using elements which are long lasting and resilient. This includes the US Optics FDN 25x 5-25x52mm FFP Horus T-3 34mm Riflescope FDN-25X-T-3 by U.S. Optics. For more shooting goods, visit their site.
Rifle Scope Details
Rifle scopes enable you to exactly aim a rifle at different targets by lining up your eye with the target at range. They accomplish this through magnification using a set of lenses inside the scope. The scope’s alignment can be adjusted to take into account different environmental elements like wind speed and elevation increases to account for bullet drop.
The scope’s purpose is to help the shooter understand exactly where the bullet will hit based upon the sight picture you are viewing using the optic as you align the scope’s crosshair or reticle with the intended target. Many modern-day rifle optics have about eleven parts which are located inside and externally on the scope body. These optic pieces consist of the rifle scope’s body, lenses, modification turrets or dials, focus rings, and other elements. Learn about the eleven parts of rifle scopes.
The Types of Rifle Scopes
Rifle scopes can be either “first focal plane” or “second focal plane” kind of scopes. The style of focal plane an optic has identifies where the reticle or crosshair is located relative to the scopes zoom. It literally suggests the reticle is located behind or in front of the magnifying lens of the scope. Deciding upon the most reliable style of rifle scope depends on what variety of shooting you intend on doing.
First Focal Plane Scope Info
Focal plane scopes (FFP) come with the reticle in front of the zoom lens. This induces the reticle to increase in size based upon the extent of zoom being used. The outcome is that the reticle measurements are the same at the amplified distance as they are at the non magnified range. For instance, one tick on a mil-dot reticle at one hundred yards without “zoom” is still the same tick at 100 yards with 5x “zoom”. These kinds of scopes work for:
- Quick acquisition, far away types of shooting
- Shooting circumstances where estimations are minor
- Experienced shooters who know their target “hold over” as well as “lead” equations for their firearm
- Shooters who do not mind the reticle is bigger and occupies more visual sight area than a SFP reticle
Second Focal Plane Glass Info
Second focal plane scopes (SFP) include the reticle to the rear of the magnification lens. This triggers the reticle to stay at the exact same size relative to the quantity of magnification being used. The end result is that the reticle measurements alter based on the magnification chosen to shoot over longer ranges because the markings present various increments which fluctuate with the zoom. In the FFP illustration with the SFP scope, the 5x “zoom” 100 yard tick measurement would be 1/5th of the non “zoom” tick. These particular varieties of optics work for:
- Far away forms of shooting where shooters have extra time to make ballistic calculations
- Shooting where most of the shots occur within shorter ranges and spaces
- Shooters who would like a clearer optic picture without room used up by the enlarged FFP reticle
Zoom for Rifle Scopes
The amount of scope magnification you require depends upon the style of shooting you wish to do. Virtually every kind of rifle glass offers some level of magnification. The volume of zoom a scope supplies is determined by the size, density, and curves of the lenses inside of the rifle scope. The magnification level of the scope is the “power” of the glass. This denotes what the shooter is checking out through the scope is magnified times the power element of what can usually be seen by human eyes.
Fixed Power Lens Scope Info
A single power rifle scope and optic uses a zoom 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 kind of scope can not adjust considering that it is a set power scope.
Info on Adjustable Power Lens Rifle Optics
Variable power rifle scopes have adjustable power. It will note the zoom degree in a configuration like 2-10×32. These numbers suggest the zoom of the scope can be adjusted in between 2x and 10x power. This additionally involves the powers in-between 2 and 10. The power adjustment is achieved by employing the power ring part of the scope near the back of the scope by the eye bell.
Glass Power Level and Range Correlation
Here are some advised scope powers and the distances where they could be efficiently used. Consider that high power scopes and optics will not be as practical as lower powered optics due to the fact that excessive zoom can be a detractor. The same concept applies to longer distances where the shooter needs enough power to see where to best aim the rifle.
About Rifle Glass Lens Finishing
All modern-day rifle scope lenses are covered in special coatings. There are different types and qualities of coverings. When shopping for high end rifle targeting units, Lens coating can be an important component of defining the capability of the rifle. The glass lenses are among the most vital parts of the glass given that they are what your eye looks through while sighting a rifle in on the target. The coating on the lenses protects the lens surface area and even helps with anti glare from excess sunlight and color visibility.
HD Versus ED Lenses
Some scope makers also use “HD” or high-definition lens coatings which use different procedures, polarizations, aspects, and chemicals to draw out different colors and viewable definition through the lens. Some scope producers use “HD” to refer to “ED” to signify the lens has extra-low dispersion glass.
Details on Single Finish Versus Multi-Coating
Different optic lenses can likewise have various coatings used to them. All lenses normally have at least some type of treatment or finishing used to them prior to being used in a rifle scope or optic.
This lens treatment can offer protection to the lens from scratches while lowering 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 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 manufacturer’s lens treatment technology and the quality of products used in constructing the rifle scope.
Anti-water Lens Covering
Water on a lens does not help with preserving a clear sight picture through a scope at all. Numerous top of the line and high-end scope makers will coat their lenses with a hydrophilic or hydrophobic finishing.
Scope Installation Options
Mounting solutions for scopes can be found in a couple of choices. There are the standard scope rings which are separately mounted to the scope and one-piece mounts which cradle the scope. These different types of mounts also usually can be found in quick release versions which use manual levers which allow rifle shooters to rapidly install and remove the glass.
Rifle Scope Mounting Solutions with Hex Key Rings
Basic, clamp style mounting optic rings use hex head screws to position to the flattop design Picatinny scope mount rails on the tops of rifles. These types of scope mounts use two detached rings to support the optic, and are made from 7075 T6 billet aluminum which are manufactured for long distance precision shooting. This kind of scope mount is exceptional for rifles which need a long lasting, unfailing mount which will not shift regardless of just how much the scope is moved or abuse the rifle takes. These are the type of mounts you really want to have for a faithful scope setup on a reach out and touch someone hunting or competitors firearm which will almost never need to be altered or adjusted. Blue 242 Loctite threadlocker can also be used on the screws to stop the hex screw threads from backing out after they are mounted firmly in position. An example of these rings are the 30mm style from the Vortex Optics brand. The set typically costs around $200 USD
Quick-Release Cantilever Optic Rings
These types of quick-release rifle scope mounts can be used to rapidly detach a scope from a rifle and reattach it to a different rifle. If they all use a comparable style mount, several scopes can often be swapped out. The quick detach design is CNC crafted from anodized 6061 T6 aluminum and the mounting levers attach firmly to a flat top style Picatinny rail. This permits the scope to be sighted in while on the rifle, removed from the rifle, and remounted while retaining the original sighting settings. These types of mounts come in convenient for rifles which are transferred between vehicles a lot, to remove the optic from the rifle for protection, or for sight systems which are used between several rifles. An example of this mount type is the 30mm mount from the Vortex Optics brand. It typically costs around $250 USD
Rifle Optic Tube Sealing and Gas Purging
Wetness inside your rifle scope can ruin a day on the range and your pricey optic by inducing fogging and creating residue inside of the scope’s tube. A lot of scopes prevent moisture from going into the scope tube with a system of sealing O-rings which are waterproof. Typically, these water resistant optics can be submerged within 20 or 30 feet of water before the water pressure can push moisture past the O-rings. This should be more than enough moisture prevention for basic use rifles, unless you anticipate taking your rifle aboard watercrafts and are concerned about the scope still functioning if it goes overboard and you can still retrieve the gun.
Gas Purged Rifle Glass Tubes
Another component of avoiding the accumulation of wetness within the rifle optic’s tube is filling the tube with a gas like nitrogen. Since this area is already taken up by the gas, the scope is less affected by temperature level alterations and pressure differences from the outdoor environment which might possibly permit water vapor to leak 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.
