Description
Rifle Scope Product Details
U.S. Optics FDN-17X Riflescope, 3.2-17x50mm, 34mm Tube, FFP, JVCR Reticle, 1/10 MIL FDN 17X JVCR
U.S. Optics FDN-17X Riflescope, 3.2-17x50mm, 34mm Tube, FFP, JVCR Reticle, 1/10 MIL Elevation/ Windage Adjustment, Black, Medium, FDN 17X JVCR
Rifle Scope Product Features
About the U.S. Optics Company
U.S. Optics is a premium producer for long gun scopes, optics, mounting solutions, and other add-ons used for guns like rifles and long guns. They create and manufacture their mounts, scopes, and related products choosing elements which are durable and long lasting. This includes the U.S. Optics FDN-17X Riflescope, 3.2-17x50mm, 34mm Tube, FFP, JVCR Reticle, 1/10 MIL FDN 17X JVCR by U.S. Optics. For additional shooting items, visit their website.
What You Need to Know About Rifle Scopes
Rifle scopes enable you to precisely aim a rifle at different targets by aligning your eye with the target over a distance. They accomplish this through zoom using a series of lenses inside the scope. The scope’s positioning can be adapted for the consideration of many natural factors like wind speed and elevation increases to make up for bullet drop.
The scope’s purpose is to help shooters understand precisely where the bullet will hit based on the sight picture you are seeing via the scope as you line up the scope’s crosshair or reticle with the target. Most modern rifle scopes and optics have around eleven parts which are located internally and externally on the scope. These optic pieces include the rifle scope’s body, lenses, adjustment turrets or dials, objective focus rings, and other components. Learn about the eleven parts of rifle glass.
Rifle Optic Types
Rifle scopes can be either “first focal plane” or “second focal plane” type of scopes. Deciding upon the finest type of rifle glass is based around what type of shooting you plan on doing.
First Focal Plane Scope Details
Focal plane scopes (FFP) include the reticle in front of the magnification lens. These types of scopes are helpful for:
- Quick acquisition, far away kinds of shooting
- Shooting situations where calculations are very little
- Experienced shooters who understand their aim point “hold over” plus “lead” equations for their weapon
- Shooters who don’t mind the reticle is enlarged and occupies more visual eyesight area than a SFP reticle
About Second Focal Plane Optics
Second focal plane optics (SFP) include the reticle to the rear of the magnifying lens. This induces the reticle to remain at the exact same dimensions in relation to the volume of zoom being used. The final result is that the reticle dimensions evolve based upon the zoom applied to shoot over lengthier ranges considering that the reticle measurements present different increments which vary with the magnification level. 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. These particular varieties of scopes work for:
- Far away kinds of shooting where shooters have additional time to make ballistic estimations
- Shooting where most of the shots happen within shorter ranges and distances
- Shooters who select a clearer optic picture with less room taken up by the bigger FFP reticle
Ins and Outs of Rifle Scope Zoom
The level of scope magnification you need on your glass is based on the sort of shooting you plan to do. Nearly every style of rifle glass provides some amount of magnification. The volume of magnification a scope delivers is determined by the size, density, and curvatures of the lenses inside of the rifle scope. The magnifying level of the scope is the “power” of the glass. This suggests what the shooter is observing through the scope is amplified times the power aspect of what can usually be seen by human eyes.
Fixed Power Lens Rifle Glass Info
A single power rifle optic and scope uses a zoom number designator like 4×32. This implies the zoom power of the scope is 4x power while the objective lens is 32mm. The zoom of this kind of optic can not adjust because it is set from the factory.
Variable Power Lens Optics
Variable power rifle scopes use variable power levels. The power modification is achieved by using the power ring part of the scope near the rear of the scope by the eye bell.
Glass Power and Ranges
Here are some advised scope power settings and the distances where they can be successfully used. High power optics will not be as effective as lower magnification scopes considering that too much zoom can be a bad thing. The same idea relates to extended ranges where the shooter needs adequate power to see where to properly aim the rifle.
About Rifle Scope Lens Finishes
All modern rifle scope and optic lenses are coated. Lens finish can be a vital aspect of a shooting system when thinking about high end rifle optics and scope setups.
HD Versus ED Lens Coatings
Some scope producers also use “HD” or high-definition lens finishes which use various processes, polarizations, chemicals, and components to draw out various 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.
Single Covering Versus Multi-Coating for Rifle Optics
Various optic lenses can even have different coverings applied to them. All lenses usually have at least some type of treatment or finishing applied to them prior to being used in a rifle scope or optic. Because the lens isn’t simply a raw piece of glass, they require performance enhancing coatings. It is part of the finely tuned optic. It must have a finishing placed on it so that the lens will be optimally functional in many kinds of environments, degrees of light (full VS shade), 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 coated lens depends on the scope producer 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 producer’s lens treatment technology and the quality of materials used in developing the rifle scope.
Hydrophobic Lens Finishes
Water on a lens doesn’t help with preserving a clear sight picture through a scope at all. Numerous top of the line and high-end optic makers will coat their lenses with a hydrophobic or hydrophilic coating which is water repellent.
Rifle Scope Mounting Choices
Installing approaches for scopes are available in a couple of choices. There are the standard scope rings which are separately installed to the optic and one-piece scope mounts which cradle the scope. These various kinds of mounts also usually are made in quick release versions which use manual levers which permit rifle shooters to quickly install and dismount the glass.
Hex Key Optic Rings
Standard, clamp style mounting scope rings use hex head screws to mount to the flattop style Picatinny scope mount rails on rifles. These types of scope mounts use a couple of different 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 mount is fine for rifles which need a resilient, rock solid mounting solution which will not move no matter how much the scope is moved or abused.
Rifle Optic Mounts with Quick-Release Cantilever Rings
These types of quick-release rifle scope mounts can be used to rapidly connect and remove a scope from a rifle before reattaching it to a different rifle. Multiple scopes can even be swapped out if they all use a similar design mount. These types of mounts are convenient for long guns which are transported a lot, to remove the optic from the rifle for protection, or for scopes which are used between multiple rifles or are situationally focused.
Sealing and Gas Purging for Rifle Scope Tubes
Moisture inside your rifle optic can spoil a day on the range and your pricey optic by triggering fogging and generating residue within the scope’s tube. The majority of optics prevent humidity from going into the scope tube with a series of sealing O-rings which are water resistant. Usually, these water-resistant optics can be immersed beneath 20 or 30 feet of water before the water pressure can push moisture past the O-rings. This should be ample moisture content avoidance for conventional use rifles, unless you plan on taking your rifle on a boat and are concerned about the optic still working if it goes over the side and you can still retrieve the firearm.
Info Around Rifle Scope Tube Gas Purging
Another component of preventing the buildup of moisture within the rifle optic tube is filling the tube with a gas like nitrogen. Because this space is already taken up by the gas, the scope is less affected by temperature level changes and pressure differences from the outside environment which might potentially allow water vapor to seep in around the seals to fill the vacuum which would otherwise exist. These are good qualities of a good rifle scope to look for.
