Last update on July 5, 2022 // Source: Amazon API
Rifle Scope Product Details
PASSION 3X 4-12x50i
German Precision Optics GPO PASSION 3X 4-12x50i Riflescope, G4i Reticle, Black Matte R360
Rifle Scope Product Features
1-inch main tube with 1/4 MOA rotation
Excellent eye relief and extreme field of view
Fast focus ocular and metal turret caps
iControl illumination and GPObright lens coating technology
About the German Precision Optics Scope Maker
German Precision Optics is a premium producer for long gun scopes, optics, mounts, and other add-ons used for guns like rifles and long guns. They design and make their mounts, scopes, and related products by making the most of elements which are resilient and long lasting. This includes the PASSION 3X 4-12x50i by German Precision Optics. For additional shooting goods, visit their site.
Facts About Glass
Rifle scopes permit you to precisely align a rifle at different targets by aligning your eye with the target at range. They do this through magnification by utilizing a series of lenses inside the scope. The scope’s positioning can be dialed in for the consideration of varied ecological considerations like wind speed and elevation increases to account for bullet drop.
The scope’s function is to help the shooter understand exactly where the bullet will hit based on the sight picture you are seeing through the optic as you line up the scope’s crosshair or reticle with the intended target. Most modern-day rifle scopes have about 11 parts which are found internally and externally on the optic. These scope parts consist of the rifle scope’s body, lenses, elevation dials or turrets, objective focus rings, and other components. Learn about the eleven parts of rifle optics.
Rifle Optic Types
Rifle scopes can be either “first focal plane” or “second focal plane” type of optics. Finding the finest type of rifle scope is based around what type of shooting you plan on doing.
First Focal Plane Optic Details
First focal plane scopes (FFP) come with the reticle in front of the magnification lens. This induces the reticle to increase in size based upon the extent of zoom being used. The benefit is that the reticle measurements are the same at the enhanced distance as they are at the non amplified range. For example, 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 kinds of scopes are practical for:
- Quick acquisition, far away kinds of shooting
- Shooting scenarios where estimations are small
- Experienced shooters who recognize their target “hold over” plus “lead” relationships for their firearms
- Shooters who don’t mind the reticle is enlarged and occupies more visual sight area than a SFP reticle
Second Focal Plane Glass Info
Second focal plane optics (SFP) include the reticle behind the magnification 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.
- Far away types of shooting where shooters have additional time to make ballistic estimations
- Shooting where most shots happen within shorter distances and ranges
- Shooters who select a clearer optic sight picture with less area taken up by the enlarged FFP reticle
Rifle Scope Zoom
The level of scope zoom you need on your scope is based on the type of shooting you like to do. Virtually every type of rifle scope offers some level of magnification. The amount of zoom a scope offers is determined by the size, density, and curvatures of the lens glass inside of the rifle optic. The magnifying level of the optic is the “power” of the opic. This denotes what the shooter is checking out through the scope is amplified times the power element of what can typically be seen by human eyes.
About Fixed Power Lens Rifle Scopes
A single power rifle scope comes with a magnification number designator like 4×32. This suggests the zoom power of the scope is 4x power and the objective lens is 32mm. The magnification of this kind of scope can not fluctuate considering that it is a set power scope.
Info About Adjustable Power Lens Scopes
Variable power rifle scopes use enhanced power. The power adjustment is accomplished by the power ring part of the scope near the rear of the scope by the eye bell.
Rifle Scope Power Level and Range Correlation
Here are some suggested scope powers and the distances where they could be efficiently used. Remember that high power optics will not be as effective as lower powered optics because increased magnification can be a negative thing in certain situations. The same idea relates to extended distances where the shooter needs to have increased power to see where to properly aim the rifle at the target.
Details on Scope Lens Coverings
All contemporary rifle scope and optic lenses are layered. There are various types and qualities of glass coverings. When researching luxury rifle optical setups, Lens coating can be an essential component of a rifle. The lenses are among the most key parts of the glass since they are what your eye looks through while sighting a rifle in on the target. The finishing on the lenses protects the lens surface area and even improves anti glare from excess natural light and color presence.
HD Versus ED Lenses
Some optic producers additionally use “HD” or high-definition lense finishes which take advantage of various procedures, polarizations, components, and chemicals to draw out a wide range of color ranges and viewable definition through the lens. This high-def finishing is often used with greater density lens glass which drops light’s chance to refract through the lens glass. Some scope brands use “HD” to refer to “ED” indicating extra-low dispersion glass. ED handles how colors are presented on the chroma spectrum and the chromatic difference or aberration which is also called color distortion or fringing. Chromatic aberration can be noticeable over things with defined shapes as light hits the object from particular angles.
Single Covering Versus Multi-Coating for Glass
Various scope lenses can even have different finishes applied to them. All lenses usually have at least some type of treatment or covering applied to them prior to being used in a rifle scope or optic assembly. This is since the lens isn’t simply a raw piece of glass. It is part of the finely tuned optic. It requires a coating to be applied to it so that the lens will be optimally usable in many types of environments, degrees of sunlight (full light VS shade), and other shooting conditions.
Single coated lenses have a treatment applied to them which is generally a protective and boosting multi-purpose treatment. This lens treatment can preserve the lens from scratches while lowering glare and other less advantageous things experienced in the shooting environment while sighting in with the optic. The quality of a single layered lens depends on the scope company and how much money you spent for it. Both the make and cost are signs of the lens quality.
Some scope manufacturers likewise make it a point to specify if their optic lenses are layered or “multi” covered. This implies the lens has multiple treatments applied to them. If a lens gets multiple treatments, it can indicate that a company is taking several actions to combat different environmental factors like an anti-glare coating, a scratch resistant anti-abrasion finishing, followed by a hydrophilic covering. This also doesn’t always imply the multi-coated lens is better than a single coated lens. Being “much better” depends on the maker’s lens treatment innovation and the quality of materials used in creating the rifle optic.
Glass Lens Anti-water Covering
Water on a scope lens does not support maintaining a clear sight picture through an optic at all. Many top of the line and high-end optic manufacturers will coat their lenses with a hydrophilic or hydrophobic finish. The Steiner Optics Nano-Protection is a fine example of this type of treatment. It provides protection for the exterior of the Steiner optic lens so the water particles can not bind to it or develop surface tension. The result is that the water beads move off of the scope to maintain a clear, water free sight picture.
Options for Installing Optics on Firearms
Mounting solutions for scopes come in a few options. There are the basic scope rings which are individually installed to the scope and one-piece scope mounts which cradle the scope. These different types of mounts also usually are made in quick release variations which use toss levers which permit rifle shooters to quickly install and remove the scope.
Hex Key Scope Rings
Standard, clamp-on type mounting scope rings use hex head screws to install to the flattop design Picatinny scope mounting rails on rifles. These types of scope mounts use a pair of independent rings to support the optic, and are normally made from 7075 T6 billet aluminum which are made for long distance accuracy shooting. This form of scope mount is ideal for rifle systems which require a durable, hard use mount which will not move regardless of how much the scope is moved or abuse the rifle takes. These are the design of mounts you really want to have for a dedicated optics setup on a reach out and touch someone scouting or competition rifle which will pretty much never need to be changed or recalibrated. Blue 242 Loctite threadlocker can additionally be used on the mount screws to keep the hex screws from backing out after they are installed firmly in position. An example of these mounting rings are the 30mm style from Vortex Optics. The set normally costs around $200 USD
Rifle Scope Mounts with Quick-Release Cantilever Rings
These types of quick-release rifle scope mounts can be used to rapidly connect and detach a scope from a rifle. If they all use a similar style mount, a number of scopes can also be swapped out. The quick detach design is CNC machined from anodized 6061 T6 aluminum and the mounting levers fasten tightly to a flat top type Picatinny rail. This allows the scope to be sighted in while on the rifle, taken off of the rifle, and remounted back on the rifle while keeping accuracy. These kinds of mounts come in convenient for shooting platforms which are moved a lot, to remove the scope glass from the rifle for protection, or for sight systems which are used in between multiple rifles. An example of this mount style is the 30mm mount from Vortex Optics. It generally costs around $250 USD
Sealing and Gas Purging for Rifle Scope Tubes
Wetness inside your rifle glass can wreck a day on the range and your expensive optic by resulting in fogging and producing residue inside of the scope’s tube. A lot of optics prevent moisture from getting in the optical tube with a series of sealing O-rings which are waterproof. Normally, these scopes can be submerged under 20 or 30 feet of water before the water pressure can force moisture past the O-rings. This should be ample humidity prevention for standard use rifles for hunting and sporting purposes, unless you plan on taking your rifle on boats and are concerned about the optic still performing if it is submerged in water and you can still recover the rifle.
Rifle Scope Gas Purging
Another component of avoiding the buildup of moisture inside of the rifle scope tube is filling the tube with a gas like nitrogen. Considering that this space is already occupied by the gas, the scope is less altered by temperature level alterations and pressure distinctions from the outside environment which could possibly allow water vapor to leak in around the seals to fill the void which would otherwise be there. These are good qualities of a decent rifle scope to look for.