Description
Rifle Scope Product Details
Schmidt Bender Exos 3-21 757-911-75D-L3-F1Y
Schmidt Bender Exos 3-21 757-911-75D-L3-F1Y
Rifle Scope Product Features
About the Schmidt & Bender Scope Maker
Schmidt & Bender is a premium maker for rifle scopes, optics, mounting solutions, and other add-ons used for guns like rifles and long guns. They innovate and manufacture their mounts, scopes, and related products making the most of materials which are durable and long lasting. This includes the Schmidt Bender Exos 3-21 757-911-75D-L3-F1Y by Schmidt & Bender. For more shooting items, visit their site.
Information Rifle Optics
Rifle scopes enable you to precisely align a rifle at various targets by lining up your eye with the target over a distance. They do this through zoom by utilizing a set of lenses within the scope. The scope’s positioning can be dialed in for consideration of numerous environmental factors like wind and elevation increases or decreases to make up for bullet drop.
The scope’s purpose is to understand precisely where the bullet will land based on the sight picture you are viewing through the scope as you line up the scope’s crosshair or reticle with the target. Most contemporary rifle optics have about 11 parts which are located inside and outside of the optic. These parts include the rifle scope’s body, lenses, modification dials, objective focus rings, and other parts. Learn about the eleven parts of rifle glass.
The Varieties of Rifle Scopes
Rifle scopes can be either “first focal plane” or “second focal plane” type of scopes. Opting for the finest type of rifle glass is based on what type of shooting you plan on doing.
First Focal Plane Optic Details
Focal plane scopes (FFP) come with the reticle in front of the magnifying lens. This triggers the reticle to increase in size based upon 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 one hundred yards without having “zoom” is still the same tick at one hundred yards with 5x “zoom”. These kinds of scopes work for:
- Quick acquisition, far away kinds of shooting
- Shooting circumstances where calculations are marginal
- Experienced shooters who have an idea for their aim point “hold over” as well as “lead” correlations for their long gun
- Shooters who do not mind the reticle is bigger and takes up more visual eyesight space 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 remain at the exact same overall size in relation to the amount of magnification being used. The result is that the reticle measurements change based on the magnification employed to shoot over lengthier distances because the markings represent distinct increments which fluctuate with the magnification level. In the FFP illustration with the SFP glass, the 5x “zoom” one hundred yard tick would be 1/5th of the non “zoom” tick reticle measurement. These types of scopes are handy for:
- Far away forms of shooting where shooters have extra time to make ballistic computations
- Shooting where most of the shots take place within much shorter ranges and proximities
- Shooters who want a clearer optic sight picture without space used up by the bigger FFP reticle
Optic Magnification
The amount of zoom a scope offers is determined by the size, thickness, and curvatures of the lenses inside of the rifle scope. The magnification of the scope is the “power” of the scope.
About Fixed Power Lens Rifle Scopes
A single power rifle optic will have a magnification number designator like 4×32. This implies the zoom power of the scope is 4x power and the objective lens is 32mm. The magnification of this kind of optic can not fluctuate given that it is a fixed power optic.
Info About Variable Power Lens Glass
Variable power rifle scopes use enhanced power. The power change is achieved using the power ring part of the scope near the rear of the scope by the eye bell.
Optic Power and Range Correlation
Here are some recommended scope power levels and the ranges where they could be successfully used. Bear in mind that high power scopes will not be as efficient as lower powered scope and optics since increased zoom can be a detractor. The exact same concept applies to longer ranges where the shooter needs adequate power to see where to properly aim the rifle at the target.
Lens Covering for Rifle Optics
All modern-day rifle scope lenses are coated. There are different types and qualities of glass lens coverings. When shopping for high end rifle optics and scope systems, Lens covering can be a vital element of defining the capability of the rifle. The lenses are among the most crucial pieces of the optic considering they are what your eye looks through while sighting a rifle in on the point of impact. The coating on the lenses shields the lens surface area as well as helps with anti glare capabilities from excess direct sunlight and color recognition.
HD Versus ED Glass Lens Coatings
Some rifle scope producers also use “HD” or high-def glass coatings that take advantage of various procedures, rare earth compounds, elements, and polarizations to extract various color ranges and viewable target definition through lenses. This HD coating is commonly used with increased density lens glass which lowers light’s ability to refract by means of the lens glass. Some scope makers use “HD” to refer to “ED” implying extra-low dispersion glass. ED deals with how colors are represented on the chromatic spectrum and the chromatic aberration or difference which is also called color distortion or fringing. Chromatic aberration can be visible over things with hard edges and shapes as light hits the object from specific angles.
Rifle Scope Lens Single Finish Versus Multi-Coating
Different optic lenses can likewise have various coverings used to them. All lenses typically have at least some type of treatment or finish used to them prior to being used in a rifle scope or optic.
Single layered lenses have a treatment applied to them which is normally a protective and improving multi-purpose treatment. This lens treatment can preserve the lens from scratches while decreasing glare and other less beneficial things experienced in the shooting environment while sighting in with the optic. The quality of a single coated lens depends upon the scope maker and the amount you spent paying for it. Both the make and cost are indications of the lens quality.
Some scope producers also make it a point to specify if their optic lenses are layered or “multi” coated. This indicates the lens has had several treatments applied to the surfaces. If a lens receives multiple treatments, it can show that a maker is taking numerous steps to combat different natural factors like an anti-glare finishing, a scratch resistant anti-abrasion coating, followed by a hydrophilic finish. This also does not necessarily imply the multi-coated lens will perform much better than a single covered lens. Being “better” hinges on the manufacturer’s lens treatment innovation and the quality of products used in creating the rifle scope.
What to Know About Anti-water Coating
Water on an optic’s lens doesn’t assist with preserving a clear sight picture through a scope in any way. Lots of top of the line or high-end optic producers will coat their lenses with a hydrophobic or hydrophilic finish. The Steiner Optics Nano-Protection is a fine example of this type of treatment. It provides protection for the exterior surfaces of the Steiner scope lens so the water particles can not bind to it or produce surface tension. The result is that the water beads slide off of the scope to keep a clear, water free sight picture.
Options for Mounting Rifle Optics on Long Guns
Mounting solutions for scopes can be found in a couple of options. There are the basic scope rings which are separately installed to the optic and one-piece scope mounts which cradle the scope. These various kinds of mounts also normally come in quick release variations which use manual levers which enable rifle operators to rapidly mount and dismount the scope.
Glass Mounting Solutions with Hex Key Rings
Basic, clamp-on style mounting scope rings use hex head screws to fix to the flattop style Picatinny scope mount rails on the tops of rifles. These varieties of scope mounts use a pair of separate rings to support the optic, and are usually constructed from 7075 T6 billet aluminum which are developed for far away precision shooting. This type of scope mount is excellent for rifles which require a durable, unfailing mount which will not move no matter just how much the scope is moved about or abuse the rifle takes. These are the style of mounts you want for a faithful scope setup on a long distance hunting or sniper competition rifle which will hardly ever need to be altered or recalibrated. Blue 242 Loctite threadlocker can also be used on the mount screws to prevent the hex screw threads from backing out after they are mounted safely in position. An example of these rings are the 30mm style made by Vortex Optics. The set usually costs around $200 USD
Quick-Release Cantilever Glass Ring Mounts
These types of quick-release rifle scope mounts can be used to rapidly take off a scope and connect it to a different rifle. Several scopes can even be swapped out if they all use a compatible style mount. These types of mounts come in handy for long guns which are transferred a lot, to remove the optic from the rifle for protecting the scope, or for optics which are used in between numerous rifles or are situationally focused.
Info Around Rifle Scope Tube Sealing and Gas Purging
Wetness inside your rifle optic can mess up a day on the range and your costly optic by triggering fogging and producing residue inside of the scope tube. Most scopes prevent humidity from entering the optical tube with a series of sealing O-rings which are waterproof. Generally, these scopes can be immersed beneath 20 or 30 feet of water before the water pressure can force moisture past the O-rings. This should be ample humidity avoidance for common use rifles for hunting and sporting purposes, unless you plan on taking your rifle on your motorboat and are concerned about the optic still working if it is submerged in water and you can still recover the rifle.
Info on Rifle Glass Tube Gas Purging
Another component of preventing the accumulation of wetness within the rifle optic tube is filling the tube with a gas like nitrogen. Because this area is currently taken up by the gas, the glass is less impacted by temp shifts and pressure distinctions from the external environment which might potentially enable water vapor to permeate in around the seals to fill the vacuum which would otherwise be there. These are good qualities of a decent rifle scope to look for.
