Description
Rifle Scope Product Details
SECOZOOM 4-50×75 ED Lens Rifle Scope New Mil Dot Reticle SF Extra-Low Dispersion Glass Optically Flawless Aspheric Apochromatic Lenses Riflescope W 35mm Mounts & Sunshade
ED (Extra-Low Dispersion) Glass
It comes with new Mil Dot reticle with more accuracy than old mil dot reticle!
The optical system in the 4-50×75 riflescope line is second-to-none and features SECOZOOM’s ED Glass lenses that reduce chromatic aberration to provide images that have superior contrast.
It provides near Abbe light dispersion and refractive index is 90.3
Proprietary ED lens multi-coating technology delivers better than 95.9999% light transmission through the scope
Function: Sniper Shooting, Hunting, Law Enforcement, Military Tactical, Competition
Specification Technics
Power Range:4-50
Main Objective:75mm
Ocular Lens:37mm
Bell Diameter-Front:68mm
FOV(ft@100yds):26.7′-2.3′
FOV(M@100M):8.9m-0.75m
Lens Quantity:14
Mounting Length:198mm
Focus Type:Side Focus
Eye relief(in):4.95-3.1
Reticle: mil dot
Tube dia.(in):35mm
Eyepiece Dia.(in):1.77
Finish: Mil Spec
Eyeguard: Soft Durometer
Diopter Adjustment:-3.2~+2.1
Windage Range(in):60MOA
Elevation Range(in):60MOA
Click Value:0.125MOA
Total Length:17.25′
Structure:1 piece monoblock
Waterproofing:Mil Spec Immersion
Fogproofing:Lifetime
Shock Resistance:3000-5000g’s
Lens: ED Glass/lenses
This listing comes with 4-50×75 ED scope+35mm one-piece mounts+75mm sunshade+cleaning cloth+flip covers for both eyepiece and objective lens
Rifle Scope Product Features
Made of ED lens, New Mil dot Reticle, Fully multicoated optical system, including 35mm mounts&75mm sunshade
Water-, fog- and shockproof construction, One piece Anodized Aluminum Main Tube
12.5x zoom range for versatility use (magnification from 4X to 50X)
35mm Tube Perfect on heavy,hard-hitting, large caliber rifles used for extended ranges,such as the .308, 50 BMG and 338 lapua magnum
ED Glass helps reduce chromatic aberrations and provides images with great contrast
About the SECOZOOM Manufacturer
SECOZOOM is a premium company for firearm scopes, optics, mounts, and other components used for guns like rifles and long guns. They style and supply their mounts, scopes, and related products choosing materials which are resilient and long lasting. This includes the SECOZOOM 4-50×75 ED Lens Rifle Scope New Mil Dot Reticle SF Extra-Low Dispersion Glass Optically Flawless Aspheric Apochromatic Lenses Riflescope W 35mm Mounts & Sunshade by SECOZOOM. For additional shooting products, visit their website.
What You Need to Know About Rifle Optics
Rifle scopes permit you to exactly align a rifle at various targets by lining up your eye with the target at range. They accomplish this through magnification by using a series of lenses inside the scope. The scope’s positioning can be adapted for consideration of many natural aspects like wind speed and elevation increases to account for bullet drop.
The scope’s purpose is to help the shooter understand exactly where the bullet will land based upon the sight picture you are seeing via the optic as you line up the scope’s crosshair or reticle with the target. The majority of modern-day rifle optics have about eleven parts which are located inside and externally on the scope. These optic pieces include the rifle scope’s body, lenses, adjustment dials, objective focus rings, and other elements. 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. Considering the finest type of rifle scope depends on what type of shooting you plan on doing.
Info About First Focal Plane Scopes
Focal plane scopes (FFP) come with the reticle in front of the magnifying lens. This induces the reticle to increase in size based upon the level of zoom being used. The result is that the reticle measurements are the same at the magnified range as they are at the non amplified distance. One tick on a mil-dot reticle at one hundred yards with no “zoom” is still the very same tick at one hundred yards with 5x “zoom”. These kinds of scopes work for:
- Quick acquisition, far away types of shooting
- Shooting circumstances where computations are marginal
- Experienced shooters who know their aim point “hold over” and also “lead” ratios for their long guns
- Shooters who do not mind the reticle is enlarged and requires more visual sight room than a SFP reticle
Second Focal Plane Glass
Second focal plane scopes (SFP) feature the reticle behind the magnification lens. This causes the reticle to stay at the same overall size in connection with the volume of zoom being used. The final result is that the reticle measurements adapt based upon the zoom chosen to shoot over longer ranges considering that the reticle measurements represent different increments which can vary with the zoom. In the FFP illustration with the SFP glass, the 5x “zoom” 100 yard tick reticle measurement would be 1/5th of the non “zoom” tick. These particular varieties of glass work for:
- Long distance types of shooting where shooters have additional time to make ballistic estimations
- Shooting where most shots take place within shorter distances and ranges
- Shooters who select a clearer optic sight picture without space used up by the enlarged FFP reticle
About Scope Zoom
The amount of zoom a scope supplies is identified by the size, thickness, and curvatures of the lenses inside of the rifle scope. The zoom of the scope is the “power” of the scope.
Info About Fixed Single Power Lens Rifle Glass
A single power rifle scope and optic uses a magnification number designator like 4×32. This means the magnification power of the scope is 4x power while the objective lens is 32mm. The zoom of this type of optic can not adjust considering that it is fixed.
Adjustable Power Lens Rifle Optics
Variable power rifle scopes can be changed between magnification levels. These types of scopes will list the zoom amount in a configuration like 2-10×32. These numbers suggest the magnification of the scope could be set in between 2x and 10x power. This additionally incorporates the powers in-between 2 and 10. The power adaptation is achieved by applying the power ring component of the scope near the rear of the scope by the eye bell.
Scope Power and Range Correlation
Here are some suggested scope powers and the distances where they could be effectively used. Highly magnified scopes will not be as beneficial as lower magnification optics because too much zoom can be a bad thing. The same relates to longer distances where the shooter needs enough power to see where to properly aim the rifle.
Rifle Optic Lens Covering
All contemporary rifle scope lenses are layered. Lens finish can be a significant element of a shooting system when buying high end rifle optics and scope systems.
HD Versus ED Lenses
Some scope brands also use “HD” or high-definition lens coatings which use different processes, polarizations, aspects, and chemicals to draw out different colors and viewable quality through the lens. Some scope producers use “HD” to refer to “ED” indicating extra-low dispersion glass.
Single Rifle Glass Lens Covering Versus Multi-Coating
Various optic lenses can even have different coatings applied to them. All lenses usually have at least some type of treatment or coating applied to them before they are 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 must have a coating placed on it so that it will be efficiently functional in many kinds of environments, degrees of sunlight (full light VS shaded), and other shooting conditions.
This lens treatment can offer protection to the lens from scratches while reducing glare and other less beneficial 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 manufacturers also make it a point to specify if their optic lenses are coated or “multi” covered. Being “better” depends on the maker’s lens treatment innovation and the quality of products used in building the rifle scope.
Hydrophobic Lens Covering
Water on a lens doesn’t help with maintaining a clear sight picture through a scope at all. Lots of top of the line and high-end optic companies will coat their lenses with a hydrophilic or hydrophobic finish.
Alternatives for Mounting Rifle Scopes on Firearms
Mounting options for scopes can be found in a few options. There are the standard scope rings which are individually installed to the scope and one-piece mounts which cradle the scope. These various kinds of mounts also usually are made in quick release versions which use manual levers which enable rifle operators to rapidly mount and remove the scope.
Hex Key Optic Ring Mounting Solutions
Standard, 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 two different rings to support the optic, and are made from 7075 T6 billet aluminum which is designed for long distance precision shooting. This type of scope mount is excellent for rifles which need a resilient, sound mounting solution which will not move no matter how much the scope is moved or abused.
Rifle Glass Mounting Solutions with Quick-Release Cantilever Rings
These types of quick-release rifle scope mounts can be used to quickly take off a scope from a rifle and reattach it to a different rifle. If they all use a similar design mount, several scopes can also be swapped out. The quick detach mount style is CNC machined from anodized 6061 T6 aluminum and the mounting levers fasten nicely to a flat top design Picatinny rail. This permits the scope to be sighted in while on the rifle, removed from the rifle, and remounted while preserving accuracy. These types of mounts come in practical for rifles which are transported a lot, to take off the optic from the rifle for protection, or for aiming systems which are adopted between a number of rifles. An example of this mount type is the 30mm mount designed by the Vortex Optics manufacturer. It usually costs around $250 USD
Sealing and Gas Purging for Rifle Optic Tubes
Moisture inside your rifle scope can mess up a day on the range and your pricey optic by causing fogging and creating residue within the scope’s tube. Many scopes prevent moisture from entering the optical tube with a series of sealing O-rings which are waterproof. Usually, these water-resistant optics can be immersed beneath 20 or 30 feet of water before the water pressure can force moisture past the O-rings. This should be sufficient wetness prevention for conventional use rifles for hunting and sporting purposes, unless you anticipate taking your rifle aboard watercrafts and are concerned about the optic still working if it is submerged in water and you can still find the rifle.
Gas Purged Rifle Glass Tubes
Another element of avoiding the accumulation of moisture inside of the rifle scope’s tube is filling the tube with a gas like nitrogen. Because this space is currently occupied by the gas, the scope is less altered by temperature level changes and pressure distinctions from the outside environment which could possibly permit water vapor to seep in around the seals to fill the void which would otherwise exist. These are good qualities of a decent rifle scope to seek out.
