Last update on July 2, 2022 // Source: Amazon API
Rifle Scope Product Details
Leupold 110089 Mark4 ER/T 8.5-25×50
110089 Reticle: Horus H37 Features: -Riflescope.-Available in Horus H37, Mil Dot or Tactical Milling Reticle.-Dual-Use ability.-XTended twilight lens system.-Side focus parallax adjustment for fast, easy parallax focusing from 50 yards to infinity, from any shooting position.-Flip-open lens covers are standard issue.-Durable, subdued.-Rugged and absolutely waterproof, the ER/T is built to Leupold Mark 4 standards, and can withstand incredible abuse.-Eye relief: 3.7″.-Tube: 1.2″ W x 6.5″ D.-Eyepiece: 1.7″ W x 3.2″ D.-Objective: 2.3″ W x 4.9″ D.-Objective clear aperture: 2″.-Actual magnification: 26.3 (8.3).-FOV @ 100: 4.5 yards (11.3 ft).-Elevation and windage adjustable range (MOA): 85. Color/Finish: -Finish: Matte Black. Specifications: -M5 windage and elevation adjustment dials with audible, tactile 1/10-MIL clicks. Dimensions: -Dimensions: 4″ H x 18.75″ W x 6.75″ D. Warranty: -Tactical optical warranty.
Rifle Scope Product Features
Scopes & Accessories
About the Leupold Company
Leupold is a premium supplier for firearm scopes, optics, mounting solutions, and other components used for firearms like rifles and long guns. They design and manufacture their scopes and related products by using building materials which are durable and long lasting. This includes the Leupold 110089 Mark4 ER/T 8.5-25×50 by Leupold. For more shooting goods, visit their website.
Rifle scopes permit you to precisely aim a rifle at various targets by lining up your eye with the target over a range. They do this through magnification by utilizing a series of lenses within the scope. The scope’s positioning can be adjusted to take into account many ecological aspects like wind and elevation to make up for bullet drop.
The scope’s purpose is to help the shooter understand precisely where the bullet will land based on the sight picture you are viewing through the optic as you line up the scope’s crosshair or reticle with the intended point of impact. The majority of contemporary rifle scopes have around 11 parts which are located inside and on the exterior of the optic. These scope parts consist of the rifle scope’s body, lenses, adjustment turrets or dials, focus rings, and other elements. Learn about the eleven parts of rifle scopes.
About Rifle Optic Types
Rifle scopes can be either “first focal plane” or “second focal plane” type of optics. Opting for the optimal type of rifle glass is based around what type of shooting you plan to do.
First Focal Plane Scope Details
First focal plane scopes (FFP) include the reticle ahead of the magnification lens. This triggers the reticle to increase in size based on the amount of magnification being used. The benefit is that the reticle measurements are the same at the enhanced distance as they are at the non magnified distance. For instance, one tick on a mil-dot reticle at one hundred yards without “zoom” is still the exact same tick at one hundred yards using 5x “zoom”. These kinds of scopes are useful for:
- Quick acquisition, far away 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 long guns
- Shooters who do not mind the reticle is bigger and takes up more visual sight area than a SFP reticle
About Second Focal Plane Scopes
Second focal plane scopes (SFP) come with the reticle to the rear of the magnification lens. In the FFP example with the SFP scope, the 5x “zoom” 100 yard tick reticle measurement would be 1/5th of the non “zoom” tick.
- Far away kinds of shooting where shooters have increased time to make ballistic calculations
- Shooting where most of the shots take place within much shorter spaces and ranges
- Shooters who prefer a clearer optic picture with less space taken up by the bigger FFP reticle
Zoom for Optics
The amount of scope magnification you need on your glass depends on the style of shooting you wish to do. Just about every type of rifle optic gives some degree of magnification. The level of zoom a scope supplies is identified by the dimension, thickness, and curves of the lenses inside of the rifle scope. The magnification of the optic is the “power” of the opic. This indicates what the shooter is observing through the scope is amplified times the power element of what can normally be seen by human eyes.
Fixed Power Lens Scopes
A single power rifle scope or optic uses a zoom number designator like 4×32. This suggests the zoom power of the scope is 4x power and the objective lens is 32mm. The zoom of this type of scope can not change because it is set from the factory.
Adjustable Power Lens Glass Facts
Variable power rifle scopes can be changed between magnification power levels. It will note the zoom level in a format such as 2-10×32. These numbers imply the zoom of the scope could be set between 2x and 10x power. This additionally utilizes the powers in-between 2 and 10. The power modification is accomplished by operating the power ring part of the scope near the rear of the scope by the eye bell piece.
The Power and Range Correlation of Rifle Optics
Here are some suggested scope powers and the ranges where they could be successfully used. Highly magnified rifle scope glass will not be as beneficial as lower powered glass considering that too much zoom can be a negative aspect depending on your shooting distance. The same idea relates to extended distances where the shooter needs to have sufficient power to see exactly where to best aim the rifle.
Lens Coating for Glass
All modern-day rifle optic and scope lenses are coated. There are various types and qualities of lens coverings. When looking at luxury rifle scope systems, Lens coating can be a crucial component of defining the rifle’s capability. The glass lenses are among the most critical components of the scope considering that they are what your eye looks through while sighting a rifle in on the target. The finish on the lenses protects the lens exterior as well as helps with anti glare capabilities from excess direct sunlight and color perception.
Info on Rifle Glass Lens Coatings – HD Versus ED
Some optic makers will also use “HD” or high-def glass finishings which make the most of various procedures, elements, chemical substances, and polarizations to draw out different colors and viewable target visibility through the lens. This HD finish is frequently used with increased density lens glass which drops light’s potential to refract through the lens glass. Some scope makers use “HD” to refer to “ED” indicating extra-low dispersion glass. ED handles how certain colors are represented on the chromatic spectrum and the chromatic aberration or deviance which is similarly called color distortion or fringing. Chromatic aberration may be visible around things with defined shapes as light hits the object from specific angles.
About Single Finishing Versus Multi-Coating
Various optic lenses can also have various coatings applied to them. All lenses generally have at least some type of treatment or finishing applied to them before they are used in a rifle scope or optic.
This lens treatment can protect the lens from scratches while minimizing glare and other less helpful things experienced in the shooting environment while sighting in with the scope. The quality of a single covered lens depends on the scope manufacturer and how much you paid for it.
Some scope makers likewise make it a point to specify if their optic lenses are layered or “multi” coated. This means the lens has numerous treatments applied to the surfaces. If a lens receives multiple treatments, it can establish that a producer is taking multiple steps to combat various natural aspects like an anti-glare finishing, a scratch resistant anti-abrasion finishing, followed by a hydrophilic covering. This also does not always imply the multi-coated lens will perform much better than a single covered lens. Being “better” is dependent on the producer’s lens treatment solutions and the quality of components used in constructing the rifle glass.
What to Know About Hydrophobic Coating
Water on an optical lens doesn’t help with preserving a clear sight picture through an optic whatsoever. Many top of the line or high-end scope makers 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 treats the exterior of the Steiner optic lens so the water particles can not bind to it or produce surface tension. The outcome is that the water beads move off of the scope to keep a clear, water free sight picture.
Choices for Mounting Rifle Scopes on Firearms
Installing solutions for scopes are available in a few choices. There are the standard scope rings which are separately mounted to the optic and one-piece scope mounts which cradle the scope. These various kinds of mounts also usually come in quick release variations which use throw levers which allow rifle operators to rapidly mount and remove the glass.
Scope Mounts with Hex Key Rings
Normal, clamp design mounting scope rings use hex head screws to mount to the flattop style Picatinny scope installation rails on rifles. These types of scope mounts use a couple of different rings to support the optic, and are often made from 7075 T6 billet aluminum which are created for long distance accuracy shooting. This type of scope mount is perfect for rifles which need a long lasting, rock solid mounting solution which will not move no matter how much the scope is moved or abused.
Rifle Optic Mounting Solutions with Quick-Release Cantilever Rings
These types of quick-release rifle scope mounts can be used to quickly detach a scope from a rifle and reattach it to a different rifle. If they all use a similar design mount, a number of scopes can often be swapped in the field. The quick detach mount style is CNC machined from anodized 6061 T6 aluminum and the mounting levers connect nicely to a flat top style Picatinny rail. This enables the scope to be sighted in while on the rifle, taken off of the rifle, and remounted while retaining precision. These kinds of mounts are useful and convenient for rifles which are moved around a lot, to take off the scope 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 the Vortex Optics brand. It generally costs around $250 USD
Details on Optic Tube Sealing and Gas Purging
Wetness inside your rifle optic can mess up a day of shooting and your pricey optic by triggering fogging and creating residue inside of the scope tube. Many scopes avoid moisture from entering the scope tube with a system of sealing O-rings which are water resistant.
Glass Gas Purging
Another part of preventing the buildup of wetness within the rifle optic tube is filling the tube with a gas like nitrogen. Because this space is already occupied by the gas, the glass is less influenced by temp alterations and pressure distinctions 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.