Last update on August 18, 2022 // Source: Amazon API
Rifle Scope Product Details
SECOZOOM 4-50x75mm Best Long Range Shooting Scope with 75mm Sunshade 35mm one-piece Mounts
Revolutionary Best 4-50×75 Long Distance Shooting and Hunting Scope!
Target Style Adjustment Knobs with Turret
One piece Anodized Aluminum Main Tube
Fully Multi-coated Green Lens
35mm Tube Perfect on heavy,hard-hitting, large caliber rifles used for extended
ranges,such as the .308, 50 BMG and 338 lapua magnum
1) Specification: 4-50×75
2) Magnification: 4x – 50x
3) Objective diameter: 75mm
4) Exit pupil:12mm-1.35mm
5) Length: 370mm
6) Tube diameter:35mm
7) Eye relief:4.95-3.1inch
8) Field of view: 26.7-2.3 at 100yds
9) Reticle:Glass Etched R/G/B illuminated Mil Dot
10) Reticle Type:Glass etched mil dot illuminated R/G/B
11) MOA: 1/8′
12) Focus Range:10-unlimited
13) Diopter Adjustment:-3~+2
14) Maximum Recoil:3000G’s
15)this listing includes 4-50×75 scope, 35mm one-piece mounts and 75mm sunshade, cleaning cloth, filp covers for both objective lens and eyepiece
Rifle Scope Product Features
4/50-75 Aircraft Aluminum Crusader Mountable Optical Gunsights
The Longest Zoom Range of Any Scope in the world! 4x to 50x
The Revolutionary 4x-50x Power TItanium Tactical Riflescope – An Astonishing Combat to 50x stand-off range optic in service today!!!
illuminated Mil-dot reticle, 96.999999….% light transmission
include 35mm one-piece mount and 75mm OD. sunshade
About the SECOZOOM Manufacturer
SECOZOOM is a premium producer for weapon scopes, optics, mounting solutions, and other components used for guns like rifles and long guns. They create and manufacture their mounts, scopes, and related products making the most of building materials which are long lasting and resilient. This includes the SECOZOOM 4-50x75mm Best Long Range Shooting Scope with 75mm Sunshade 35mm one-piece Mounts by SECOZOOM. For more shooting items, visit their site.
All About Glass
Rifle scopes allow you to exactly align a rifle at different targets by aligning your eye with the target over a range. They do this through zoom by utilizing a set of lenses inside the scope. The scope’s positioning can be adjusted to take into account varied environmental factors like wind and elevation increases to make up for bullet drop.
The scope’s function is to help shooters understand exactly where the bullet will hit based on the sight picture you are viewing using the optic as you align the scope’s crosshair or reticle with the intended target. Many modern rifle scopes have about eleven parts which are found inside and externally on the scope. These scope parts consist of the rifle scope’s body, lenses, windage turrets, focus rings, and other components. See all eleven parts of scopes.
The Types of Rifle Scopes
Rifle scopes can be either “first focal plane” or “second focal plane” type of scopes. The style of focal plane a scope has determines where the reticle or crosshair lies in regard to the optic’s magnifying adjustments. It actually means the reticle is behind or ahead of the magnification lens of the optic. Looking for the best style of rifle glass depends on what type of hunting or shooting you anticipate undertaking.
First Focal Plane Scope Details
Focal plane scopes (FFP) include the reticle in front of the zoom lens. These styles of scopes are beneficial for:
- Quick acquisition, long distance kinds of shooting
- Shooting circumstances where calculations are very little
- Experienced shooters who have an idea for their aim point “hold over” plus “lead” relationships for their long gun
- Shooters who do not mind the reticle is enlarged and uses up more visual eyesight room than a SFP reticle
Second Focal Plane Scope Details
Second focal plane glass (SFP) feature the reticle to the rear of the magnifying lens. This causes the reticle to remain at the same scale in connection with the quantity of magnification being used. The outcome is that the reticle measurements adapt based on the magnification employed to shoot over greater ranges considering the markings present distinct increments which change with the magnification. In the FFP illustration with the SFP scope, the 5x “zoom” one hundred yard tick measurement would be 1/5th of the non “zoom” tick reticle measurement. These particular types of scopes are handy for:
- Far away kinds of shooting where shooters have more time to make ballistic computations
- Shooting where most of the shots take place within much shorter ranges and proximities
- Shooters who like a clearer optic picture without room taken up by the enlarged FFP reticle
Ins and Outs of Rifle Scope Zoom
The quantity of scope magnification you need is based on the sort of shooting you would like to do. Virtually every type of rifle glass supplies some degree of zoom. The level of magnification a scope supplies is identified by the size, density, and curvatures of the lenses inside of the rifle scope. The magnifying level of the optic is the “power” of the opic. This indicates what the shooter is observing through the scope is amplified times the power aspect of what can generally be seen by human eyes.
About Fixed Power Lens Glass
A single power rifle scope or optic will have 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 type of scope can not change considering that it is fixed.
Adjustable Power Lens Optic Details
Variable power rifle scopes use enhanced power. The power change is performed using the power ring part of the scope near the rear of the scope by the eye bell.
The Power and Range Correlation of Rifle Scopes
Here are some advised scope power settings and the distances where they may be successfully used. Highly magnified scopes will not be as effective as lower magnification rifle scope glass due to the fact that too much zoom can be a negative aspect depending on your shooting distance. The same relates to longer ranges where the shooter needs to have adequate power to see where to properly aim the rifle at the target.
Lens Covering for Rifle Optics
All current rifle optic lenses are covered. Lens covering can be an essential aspect of a rifle’s setup when buying high end rifle optics and scope setups.
HD Versus ED Lenses
Some scope manufacturers also use “HD” or high-definition glass finishings that employ various procedures, rare earth compounds, components, and polarizations to draw out separate color ranges and viewable target definition through lenses. This HD covering is commonly used with greater density glass which drops light’s chance to refract through the lens glass. Some scope manufacturers use “HD” to describe “ED” signifying extra-low dispersion glass. ED handles how colors are presented on the chromatic spectrum and the chromatic aberration or deviance which is similarly called color distortion or fringing. Chromatic aberration can be obvious around items with well defined outlines as light hits the object from various angles.
Optic Lens Single Coating 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.
Single coated lenses have a treatment applied to them which is usually a protective and boosting multi-purpose treatment. This lens treatment can preserve the lens from scratches while decreasing glare and other less helpful things experienced in the shooting environment while sighting in with the optic. The quality of a single layered lens depends on the scope manufacturer and how much you spent on it. Both the manufacturer and amount are signs of the lens quality.
Some scope producers also make it a point to define if their optic lenses are layered or “multi” covered. This implies the lens has had several treatments applied to the surfaces of the glass. If a lens gets several treatments, it can indicate that a company is taking numerous actions to fight different natural elements like an anti-glare covering, a scratch resistant anti-abrasion covering, followed by a hydrophilic finishing. This additionally doesn’t necessarily indicate the multi-coated lens is better than a single covered lens. Being “better” depends on the manufacturer’s lens treatment solutions and the quality of products used in creating the rifle optic.
Info on Hydrophobic Finishing
Water on a scope’s lens does not help with preserving a clear sight picture through an optic whatsoever. Numerous top of the line or premium scope manufacturers will coat their lenses with a hydrophobic or hydrophilic covering. The Steiner Optics Nano-Protection is a fine example of this sort of treatment. It provides protection for the exterior of the Steiner optic lens so the H2O molecules can not bind to it or produce surface tension. The result is that the water beads sheet off of the scope to keep a clear, water free sight picture.
Glass Installation Options
Mounting options for scopes can be found in a few choices. There are the standard scope rings which are individually mounted to the optic and one-piece mounts which cradle the scope. These different types of mounts also usually come in quick release versions which use throw levers which allow rifle shooters to rapidly install and dismount the scope.
Rifle Scope Mounting Solutions with Hex Key Rings
Normal, clamp design mounting scope rings use hex head screws to mount to the flattop design Picatinny scope installation rails on rifles. These types of scope mounts use two different rings to support the optic, and are often made from 7075 T6 billet aluminum which are developed for long range precision shooting. This type of scope mount is perfect for rifles which require a resilient, rock solid mount which will not move no matter how much the scope is moved or abused.
Quick-Release Cantilever Glass Ring Mounting Solutions
These types of quick-release rifle scope mounts can be used to rapidly remove a scope and attach it to a different rifle. Multiple scopes can even be switched out if they all use a similar design mount. These types of mounts are handy for long guns which are transported a lot, to remove the optic from the rifle for protection, or for optics which are used in between multiple rifles or are situationally focused.
About Rifle Scope Tube Sealing and Gas Purging
Wetness inside your rifle optic can ruin a day of shooting and your costly optic by triggering fogging and creating residue inside of the scope tube. Most scopes avoid wetness from entering the scope tube with a system of sealing O-rings which are water resistant.
Gas Purged Scope Tubes
Another element of avoiding the accumulation of moisture within the rifle optic tube is filling the tube with a gas like nitrogen. Given that this area is already occupied by the gas, the scope is less influenced by condition changes and pressure differences from the external environment which may possibly permit water vapor to permeate in around the seals to fill the vacuum which would otherwise exist. These are good qualities of a decent rifle scope to look for.