Description
Rifle Scope Product Details
QILU 3-9×40 Red Green Rangefinder Illuminated Optics Sight Scope Hunting Rifle Scope
Specification
Tube Diameter: 25mm
Adjustment Click Value: 1/4 MOA
Adjustment Type: Click
Lens Coating: Fully Multicoated
Magnification: 3-9x
Illuminated Reticle: Yes
Battery Type: CR2032
Waterproof:Yes
Fogproof: Yes
Shockproof: Yes
Objective Bell Diameter: 40mm
Ocular Bell Diameter: 40mm
Eye Relief: 2-3”
Exit Pupil Diameter: 4.4mm
Weight: 13.5oz
Rifle Scope Product Features
Parallax: The Scope Is Parallax Free At 100 Yards, Making It Easy To Target At Closer Range. _i
Precision Aiming: The 3-9x Magnification Scope Features 1/4 MOA Click Adjustments To Improve Accuracy. Jl
Quality Construction: The Scope Comes With Multi-coated Optics, Providing Impressive Viewing Clarity. Tube Diameter 1″. NW
Robust Design: The Scope Is Built With Extra-rigid Construction, Being Waterproof, Fogproof, And Shockproof. J4
Two Modes Illumination Color: Red And Green Illumination,5 Levels Brightness Adjustment,3-9x Magnification,40mm Objective Lens Pc
About the QILU Scope Maker
QILU is a premium company for rifle scopes, optics, mounting solutions, and other add-ons used for guns like rifles and long guns. They design and supply their products by making the most of materials which are long lasting and durable. This includes the QILU 3-9×40 Red Green Rangefinder Illuminated Optics Sight Scope Hunting Rifle Scope by QILU. For more shooting items, visit their site.
What You Need to Know About Glass
Rifle scopes enable you to specifically align a rifle at various targets by lining up your eye with the target over a range. They accomplish this through magnification by making use of a set of lenses inside the scope. The scope’s positioning can be adjusted for consideration of different natural considerations like wind speed and elevation increases to make up for bullet drop.
The scope’s function is to help the shooter understand precisely where the bullet will land based upon the sight picture you are seeing with the optic as you line up the scope’s crosshair or reticle with the intended target. The majority of modern rifle optics have about eleven parts which are located within and externally on the scope body. These parts consist of the rifle scope’s body, lenses, adjustment dials, objective focus rings, and other parts. Learn about the eleven parts of glass.
Rifle Scope Types
Rifle scopes can be either “first focal plane” or “second focal plane” type of optics. Going for the optimal type of rifle scope is based around what type of shooting you plan on doing.
First Focal Plane Glass
Focal plane scopes (FFP) feature the reticle in front of the magnifying lens. This causes the reticle to increase in size based on the level of magnification being used. The benefit is that the reticle measurements are the same at the amplified distance as they are at the non amplified range. As an example, one tick on a mil-dot reticle at one hundred yards with no “zoom” is still the corresponding tick at one hundred yards with 5x “zoom”. These kinds of scopes work for:
- Quick acquisition, far away kinds of shooting
- Shooting situations where calculations are minor
- Experienced shooters who know their target “hold over” and “lead” equations for their rifles
- Shooters who do not mind the reticle is enlarged and takes up more visual sight area than a SFP reticle
Second Focal Plane Glass Details
Second focal plane glass (SFP) feature the reticle behind the zoom lens. This induces the reticle to stay at the same size in connection with the quantity of magnification being used. The effect is that the reticle measurements shift based on the magnification applied to shoot over greater distances since the reticle measurements represent distinct increments which vary with the zoom. In the FFP illustration with the SFP scope, the 5x “zoom” 100 yard tick reticle measurement would be 1/5th of the non “zoom” tick reticle measurement. These particular styles of scopes are convenient for:
- Far away styles of shooting where shooters have more time to make ballistic estimations
- Shooting where most shots occur within much shorter ranges and distances
- Shooters who desire a clearer optic sight picture without room taken up by the bigger FFP reticle
Details on Rifle Optic Magnification
The quantity of scope magnification you require depends on the form of shooting you desire to do. Pretty much every kind of rifle glass provides some degree of magnification. The level of zoom a scope gives is determined by the dimension, thickness, and curvatures of the lens glass within the rifle optic. The magnification of the scope is the “power” of the scope. This means what the shooter is aiming at through the scope is amplified times the power element of what can normally be seen by human eyes.
About Fixed Single Power Lens Rifle Glass
A single power rifle scope uses a magnification number designator like 4×32. This implies the zoom power of the scope is 4x power while the objective lens is 32mm. The zoom of this kind of scope can not fluctuate since it is fixed.
Variable Power Lens Rifle Glass
Variable power rifle scopes can be changed between magnification increments. These types of scopes will list the zoom degree in a format like 2-10×32. These numbers indicate the zoom of the scope could be adjusted in between 2x and 10x power. This also utilizes the power levels in-between 2 and 10. The power adjustment is accomplished by making use of the power ring component of the scope near the rear of the scope by the eye bell piece.
The Power Level and Range Correlation of Rifle Glass
Here are some recommended scope power settings and the ranges where they can be efficiently used. Highly magnified optics will not be as beneficial as lower magnification level scopes because too much magnification can be a bad thing. The same idea relates to extended distances where the shooter needs increased power to see precisely where to best aim the rifle.
Details on Rifle Scope Lens Coverings
All state-of-the-art rifle scope and optic lenses are coated. Lens covering can be a significant aspect of a rifle system when considering high end rifle optics and scope equipment.
Details on Optic Lens Coatings – HD Versus ED
Some rifle scope manufacturers even use “HD” or high-def glass finishes that apply different procedures, rare earth compounds, elements, and polarizations to draw out various colors and viewable definition through the lens. This HD finishing is typically used with more costly high density glass which reduces light’s potential to refract by means of the lens glass. Some scope suppliers use “HD” to refer to “ED” signifying extra-low dispersion glass. ED deals with how certain colors are presented on the chromatic spectrum and the chromatic difference or aberration which is also called color distortion or fringing. Chromatic aberration can be obvious around things with defined outlines as light hits the object from certain angles.
Single Rifle Glass Lens Covering Versus Multi-Coating
Different optic lenses can also have different coverings applied to them. All lenses usually have at least some type of treatment or finish applied to them prior to being used in a rifle scope or optic.
This lens treatment can offer protection to the lens from scratches while lowering glare and other less advantageous things experienced in the shooting environment while sighting in with the scope. The quality of a single layered lens depends on the scope maker and how much you paid for it.
Some scope makers also make it a point to define if their optic lenses are coated or “multi” coated. Being “much better” depends on the producer’s lens treatment innovation and the quality of products used in constructing the rifle scope.
Glass Lens Hydrophobic Finishing
Water on a lens doesn’t help with maintaining a clear sight picture through an optic at all. Numerous top of the line and premium optic producers will coat their lenses with a hydrophilic or hydrophobic covering. The Steiner Optics Nano-Protection is a fine example of this sort of treatment. It deals with the exterior surfaces of the Steiner scope lens so the water particles can not bind to it or create surface tension. The outcome is that the water beads roll off of the scope to keep a clear, water free sight picture.
Choices for Mounting Rifle Optics on Firearms
Installing options for scopes come in a few choices. There are the basic scope rings which are separately installed to the optic and one-piece mounts which cradle the scope. These different kinds of mounts also normally come in quick release variations which use throw levers which enable rifle shooters to quickly mount and remove the glass.
Hex Key Rifle Optic 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 two separate rings to support the optic, and are often made from 7075 T6 billet aluminum which is created for long range accuracy shooting. This type of scope mount is perfect for rifles which need a resilient, sound mounting solution which will not move no matter how much the scope is moved or abuse the rifle takes.
Quick-Release Cantilever Rifle Optic Ring Mounts
These kinds of quick-release rifle scope mounts can be used to quickly detach a scope from a rifle and reattach it to a different rifle. Several scopes can also be swapped out if they all use a complementary designed mount. The quick detach design is CNC machined from anodized 6061 T6 aluminum and the mounting levers connect tightly to a flat top type Picatinny rail. This allows the scope to be sighted in while on the rifle, taken off of the rifle, and remounted back on the rifle while preserving the original sighting settings. These types of mounts are useful and convenient for rifles which are hauled around a lot, to take off the optic from the rifle for protection, or for sight systems which are employed between multiple rifles. An example of this mount style is the 30mm mount designed by Vortex Optics. It typically costs around $250 USD
Sealing and Gas Purging for Rifle Scope Tubes
Moisture inside your rifle scope can spoil a day on the range and your highly-priced optic by resulting in fogging and generating residue inside of the scope’s tube. Many optics prevent wetness from getting in the optical tube with a system of sealing O-rings which are water resistant. Normally, these scopes can be submerged beneath 20 or 30 feet of water before the water pressure can force moisture past the O-rings. This should be ample humidity prevention for common use rifles, unless you plan on taking your rifle boating and are concerned about the scope still functioning if it falls overboard and you can still retrieve the firearm.
Info on Optic Tube Gas Purging
Another component of preventing the buildup of moisture inside of the rifle scope tube is filling the tube with a gas like nitrogen. Since this area is already taken up by the gas, the scope is less influenced by temp shifts and pressure variations from the outdoor environment which may potentially enable water vapor to seep in around the seals to fill the void which would otherwise be there. These are good qualities of a decent rifle scope to seek out.
