Description
Rifle Scope Product Details
Schmidt Bender Exos 3-21 SFP Riflescope LRH-MOA Illuminated 757-911-72D-L3-F1Y
Schmidt Bender Exos 3-21 SFP Riflescope LRH-MOA Illuminated 757-911-72D-L3-F1Y
Rifle Scope Product Features
About the Schmidt & Bender Company
Schmidt & Bender is a premium supplier for rifle scopes, optics, mounts, and other add-ons used for firearms like rifles and long guns. They design and build their mounts and related products working with elements which are resilient and long lasting. This includes the Schmidt Bender Exos 3-21 SFP Riflescope LRH-MOA Illuminated 757-911-72D-L3-F1Y by Schmidt & Bender. For more shooting products, visit their website.
What You Need to Know About Glass
Rifle scopes permit you to specifically align a rifle at various targets by aligning your eye with the target at range. They do this through magnifying the target by utilizing a set of lenses within the scope. The scope’s alignment can be dialed in for consideration of many natural considerations like wind speed and elevation to account for bullet drop.
The scope’s function is to understand exactly where the bullet will land based upon the sight picture you are viewing via the optic as you line up the scope’s crosshair or reticle with the intended point of impact. A lot of modern-day rifle optics have about 11 parts which are located within and outside of the scope. These optic pieces consist of the rifle scope’s body, lenses, elevation dials or turrets, objective focus rings, and other components. See all eleven parts of a rifle scope.
Rifle Optic Varieties
Rifle scopes can be either “first focal plane” or “second focal plane” type of scopes. The kind of focal plane a scope has identifies where the reticle or crosshair lies in connection with the scopes zoom. It literally implies the reticle is situated behind or ahead of the magnifying lens of the optic. Deciding upon the most effective kind of rifle scope is based on what style of shooting you intend on doing.
First Focal Plane Scope Facts
Focal plane scopes (FFP) feature the reticle in front of the magnification lens. These kinds of scopes are useful for:
- Quick acquisition, long distance types of shooting
- Shooting circumstances where computations are low
- Experienced shooters who understand their aim point “hold over” as well as “lead” correlations for their weapon
- Shooters who do not mind the reticle is bigger and takes up more visual eyesight room than a SFP reticle
Info on Second Focal Plane Scopes
Second focal plane scopes (SFP) come with the reticle to the rear of the magnifying lens. This triggers the reticle to stay at the exact same scale in relation to the level of magnification being used. The result is that the reticle dimensions evolve based on the magnification employed to shoot over lengthier ranges since the markings represent different increments which can vary with the magnification level. In the FFP example with the SFP scope, the 5x “zoom” one hundred yard tick reticle measurement would be 1/5th of the non “zoom” tick measurement. These particular varieties of scopes are beneficial for:
- Far away kinds of shooting where shooters have extra time to make ballistic estimations
- Shooting where most of the shots take place within much shorter ranges and spaces
- Shooters who want a clearer optic picture without room taken up by the larger size FFP reticle
Ins and Outs of Scope Magnification
The quantity of scope zoom you need on your scope is based on the form of shooting you intend to do. Nearly every kind of rifle optic delivers some level of magnification. The amount of zoom a scope provides is established by the size, thickness, and curves of the lens glass inside of the rifle optic. The magnification level of the optic is the “power” of the opic. This signifies what the shooter is observing through the scope is magnified times the power aspect of what can usually be seen by human eyes.
Single Power Lens Rifle Glass
A single power rifle scope or optic comes with a zoom 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 kind of scope can not fluctuate considering that it is a set power scope.
Adjustable Power Lens Scopes
Variable power rifle scopes can be adjusted between magnification increments. It will list the zoom level in a configuration like 2-10×32. These numbers imply the zoom of the scope can be changed in between 2x and 10x power. This always incorporates the power levels in-between 2 and 10. The power adjustment is achieved using the power ring part of the scope near the back of the scope by the eye bell piece.
Rifle Glass Power Level and Ranges
Here are some advised scope power settings and the ranges where they can be successfully used. Consider that higher magnification optics will not be as practical as lower magnification level optics and scopes due to the fact that excessive magnification can be a bad thing. The same goes for longer distances where the shooter needs enough power to see where to best aim the rifle.
Lens Coating for Optics
All modern-day rifle scope and optic lenses are layered. There are various types and qualities of lens coatings. Lens finishing can be an essential element of a rifle when contemplating luxury rifle optics and targeting equipment. The glass lenses are one of the most crucial pieces of the glass as they are what your eye sees through while sighting a rifle in on the target. The coating on the lenses offers protection to the lens surface area and even helps with anti glare capabilities from refracted direct sunlight and color exposure.
ED Versus HD Optics
Some glass suppliers additionally use “HD” or high-definition lense coatings which use different procedures, polarizations, elements, and chemicals to enhance different color ranges and viewable target definition through the lens. This HD finish is often used with higher density lens glass which drops light’s capability to refract by means of the lens glass. Some scope manufacturers use “HD” to describe “ED” signifying extra-low dispersion glass. ED deals with how colors are presented on the chroma spectrum and the chromatic aberration or deviance which is also called color distortion or fringing. Chromatic aberration can be noticeable around things with hard edges and outlines as light hits the object from certain angles.
Single Finishing Versus Multi-Coating
Various optic lenses can also have various coverings used to them. All lenses usually have at least some type of treatment or finishing used to them before being used in a rifle scope or optic.
This lens treatment can offer protection to the lens from scratches while decreasing glare and other less helpful things experienced in the shooting environment while sighting in with the scope. The quality of a single layered lens depends on the scope producer and how much you paid for it.
Some scope manufacturers also make it a point to specify if their optic lenses are coated or “multi” coated. This indicates the lens has had multiple treatments applied to the surfaces. If a lens gets multiple treatments, it can indicate that a company is taking numerous steps to fight different natural aspects like an anti-glare covering, a scratch resistant anti-abrasion finishing, followed by a hydrophilic finish. This additionally doesn’t necessarily imply the multi-coated lens will perform much better than a single coated lens. Being “better” is dependent on the producer’s lens treatment techniques and the quality of components used in creating the rifle glass.
Anti-water Lens Coating
Water on a scope’s lens does not assist with preserving a clear sight picture through a scope whatsoever. Numerous top of the line and high-end scope manufacturers will coat their lenses with a hydrophilic or hydrophobic covering. The Steiner Optics Nano-Protection is a good example of this sort of treatment. It deals with the surface of the Steiner optic lens so the water molecules can not bind to it or develop surface tension. The outcome is that the water beads move off of the scope to maintain a clear, water free sight picture.
Alternatives for Mounting Glass on Long Guns
Installing options for scopes can be found in a couple of options. There are the basic scope rings which are separately mounted to the scope and one-piece mounts which cradle the scope. These different kinds of mounts also generally can be found in quick release variations which use toss levers which enable rifle operators to quickly install and dismount the scope.
Rifle Glass Mounting Solutions with Hex Key Rings
Basic, clamp design mounting scope rings use hex head screws to position to the flattop design Picatinny scope mount rails on the tops of rifles. These varieties of scope mounts use a pair of detached rings to support the optic, and are normally made from 7075 T6 billet aluminum or similar materials which are designed for long distance accuracy shooting. This type of scope mount is ideal for rifle systems which are in need of a long lasting, unfailing mount which will not shift despite just how much the scope is moved about or jarring the rifle takes. These are the style of mounts you should have for a faithful scope setup on a long distance hunting or sniper competition rifle which will rarely need to be changed or adjusted. Blue 242 Loctite threadlocker can also be used on the mount’s screws to protect against the hex screws from wiggling out after they are mounted tightly in place. An example of these rings are the 30mm style from the Vortex Optics company. The set usually costs around $200 USD
Quick-Release Cantilever Rifle Scope 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. A wide range of scopes can also be swapped out if they all use a similar style mount. The quick detach mount style is CNC machined from anodized 6061 T6 aluminum and the mounting levers fasten solidly 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 maintaining the original sighting settings. These types of mounts are useful and practical for shooting platforms which are transferred a lot, to take off the scope glass from the rifle for protection, or for sight systems which are utilized in between multiple rifles. An example of this mount type is the 30mm mount from the Vortex Optics brand. It normally costs around $250 USD
Info Around Rifle Glass Tube Sealing and Gas Purging
Moisture inside your rifle optic can spoil a day on the range and your costly optic by causing fogging and developing residue within the scope’s tube. Many scopes prevent humidity from getting in the optical tube with a series of sealing O-rings which are waterproof. Typically, these optics can be submerged under 20 or 30 feet of water before the water pressure can push moisture past the O-rings. This should be more than enough humidity prevention for basic use rifles for hunting and sporting purposes, unless you anticipate taking your rifle aboard a watercraft and are worried about the scope still working if it goes overboard and you can still salvage the rifle.
What to Know About Rifle Scope Tube Gas Purging
Another element of preventing the buildup of moisture inside of the rifle scope’s tube is filling the tube with a gas like nitrogen. Since this area is already occupied by the gas, the scope is less impacted by temperature level shifts and pressure differences from the outdoor environment which could possibly enable water vapor to permeate in around the seals to fill the vacuum which would otherwise exist. These are good qualities of a good rifle scope to seek out.
