Last update on June 4, 2023 // Source: Amazon API
Rifle Scope Product Details
TRUGLO TRU-BRITE 30 Series Illuminated Tactical Rifle Scope – Includes Scope Mount, 3-9 x 42mm
This black tactical 30mm 3-9×42 Illuminated Scope includes two removable BDC target turrets in.223 and.308 calibers. The reticle, which can be used in black, without illumination, can accommodate targets up to 600 yards away.
Rifle Scope Product Features
About this item
Bright, 3-9 x 42mm objective lens with rheostat controlled brightness; INCLUDED QUICK ZOOM LEVER; Generous 4-inch eye relief
DUAL-COLOR ILLUMINATED RETICLE (red & green); Glass-etched reticle can be used without illumination (black)
ONE-PIECE AIRCRAFT-GRADE ALUMINUM TUBE; water & shock resistant; fog-proof; LIMITED LIFETIME WARRANTY
INCLUDES REVERSIBLE, OFFSET, MONOLITHIC 30MM SCOPE MOUNT made of CNC-machined aircraft grade aluminum; Includes 2 precalibrated BDC turrets in calibers .223 (55 grain) and .308 (168 grain) to engage targets up to 600 yards away
MIL-DOT RETICLE enables user to determine the distance of objects of a known size and provides quick trajectory and wind drift aiming references (calibrated at 8x magnification)
About the TRUGLO Manufacturer
TRUGLO is a premium company for rifle scopes, optics, mounts, and other add-ons used for guns like rifles and long guns. They innovate and manufacture their mounts, scopes, and related products by choosing building materials which are long lasting and durable. This includes the TRUGLO TRU-BRITE 30 Series Illuminated Tactical Rifle Scope – Includes Scope Mount, 3-9 x 42mm by TRUGLO. For additional shooting goods, visit their website.
All About Glass
Rifle scopes allow you to specifically aim a rifle at different targets by aligning your eye with the target over a range. They accomplish this through magnifying the target by employing a set of lenses within the scope. The scope’s alignment can be adjusted to take into account separate natural considerations like wind speed and elevation to make up for bullet drop.
The scope’s purpose is to understand exactly where the bullet will land based upon the sight picture you are viewing via the scope as you line up the scope’s crosshair or reticle with the target. Many modern-day rifle scopes have about 11 parts which are arranged internally and externally on the scope. These parts include the rifle scope’s body, lenses, modification dials or turrets, focus rings, and other elements. See all eleven parts of an optic.
About Scope Styles
Rifle scopes can be either “first focal plane” or “second focal plane” type of optics. Choosing the best type of rifle optic is based around what type of shooting you plan on doing.
About First Focal Plane Scopes
Focal plane scopes (FFP) feature the reticle in front of the magnification lens. These styles of scopes are beneficial for:
- Quick acquisition, long distance types of shooting
- Shooting scenarios where computations are marginal
- Experienced shooters who understand their aim point “hold over” and also “lead” correlations for their firearm
- Shooters who don’t mind the reticle is bigger and occupies more visual eyesight space than a SFP reticle
Second Focal Plane Optics
Second focal plane scopes (SFP) feature the reticle to the rear of the zoom lens. In the FFP example with the SFP scope, the 5x “zoom” one hundred yard tick measurement would be 1/5th of the non “zoom” tick measurement.
- Long distance types of shooting where shooters have additional time to make ballistic estimations
- Shooting where most of the shots occur within shorter proximities and ranges
- Shooters who choose a clearer optic picture with less space taken up by the larger size FFP reticle
Magnification for Rifle Glass
The extent of scope zoom you require depends on the style of shooting you desire to do. Practically every style of rifle scope gives some level of zoom. The volume of zoom a scope delivers is identified by the size, thickness, and curvatures of the lens glass inside of the rifle scope. The magnification of the optic is the “power” of the glass. This indicates what the shooter is looking at through the scope is amplified times the power aspect of what can typically be seen by human eyes.
Info on Fixed Power Lens Optics
A single power rifle scope uses a zoom number designator like 4×32. This implies the magnification power of the scope is 4x power and the objective lens is 32mm. The magnification of this kind of scope can not adjust considering that it is a fixed power optic.
Variable Power Lens Rifle Glass Info
Variable power rifle scopes have adjustable power. These types of scopes will list the zoom degree in a format like 2-10×32. These numbers mean the zoom of the scope can be set in between 2x and 10x power. This additionally involves the powers in-between 2 and 10. The power shift is accomplished using the power ring part of the scope near the back of the scope by the eye bell piece.
Power Levels and Range Correlations
Here are some suggested scope powers and the ranges where they can be effectively used. High power rifle scope glass will not be as beneficial as lower magnification scopes since too much zoom can be a negative aspect depending on your shooting distance. The same concept relates to extended ranges where the shooter needs to have enough power to see exactly where to properly aim the rifle at the target.
About Glass Lens Finishing
All state-of-the-art rifle optic lenses are coated. Lens covering is a significant aspect of a rifle when thinking about high end rifle optics and scope systems.
About Rifle Glass Lens Coatings – HD Versus ED
Some rifle scope companies also use “HD” or high-def lense finishings which use various procedures, chemicals, elements, and polarizations to extract a wide range of colors and viewable target definition through the lens. This high-definition covering is often used with increased density glass which brings down light’s ability to refract through the lens glass. Some scope producers use “HD” to refer to “ED” signifying extra-low dispersion glass. ED handles how certain colors are represented on the chromatic spectrum and the chromatic deviance or aberration which is similarly called color distortion or fringing. Chromatic aberration can be visible over things with hard shapes as light hits the item from various angles.
Single Rifle Optic Lens Covering Versus Multi-Coating
Various scope lenses can also have different finishes applied to them. All lenses normally have at least some kind of treatment or covering applied to them prior to being used in a rifle scope or optic assembly. This is due to the fact that the lens isn’t just a raw piece of glass. It is part of the finely tuned optic. It needs to have a finish put on it so that the lens will be efficiently functional in numerous kinds of environments, degrees of sunshine (full VS shade), and other shooting conditions.
This lens treatment can protect 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 coated lens depends on the scope maker and how much you paid for it.
Some scope producers also make it a point to define if their optic lenses are coated or “multi” coated. Being “much better” depends on the manufacturer’s lens treatment innovation and the quality of materials used in developing the rifle scope.
Details on Hydrophobic Covering
Water on a lens does not assist with keeping a clear sight picture through a scope at all. Lots of top of the line and high-end optic makers will coat their lenses with a hydrophilic or hydrophobic covering which is water repellent.
Glass Installation Choices
Installing options for scopes are available in a few options. There are the basic scope rings which are individually installed to the scope and one-piece mounts which cradle the scope. These various kinds of mounts also typically can be found in quick release variations which use toss levers which enable rifle shooters to rapidly mount and remove the optics.
Hex Key Rifle Optic Ring Mounting Solutions
Standard, clamp design mounting scope rings use hex head screws to position to the flattop design Picatinny scope mounting rails on the tops of rifles. These kinds of scope mounts use a pair of independent rings to support the optic, and are normally made from 7075 T6 billet aluminum or similar materials which are designed for long distance precision shooting. This type of scope mount is ideal for rifles which require a durable, unfailing mount which will not move no matter just how much the scope is moved about or abuse the rifle takes. These are the style of mounts you really want to have for a dedicated scope system on a reach out and touch someone scouting or sniper competition long gun which will pretty much never need to be altered or recalibrated. Blue 242 Loctite threadlocker can additionally be used to prevent the hex screw threads from wiggling out after they are mounted safely in position. An example of these rings are the 30mm type made by the Vortex Optics company. The set typically costs around $200 USD
Scope Mounts with Quick-Release Cantilever Rings
These kinds of quick-release rifle scope mounts can be used to quickly remove 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 complementary designed mount. The quick detach mount style is CNC machined from anodized 6061 T6 aluminum and the mounting levers attach solidly to a flat top type Picatinny rail. This lets the scope to be sighted in while on the rifle, taken off of the rifle, and remounted back on the rifle while keeping precision. These types of mounts come in handy for rifles which are shipped a lot, to take off the optic from the rifle for protection, or for optics which are employed in between several rifles. An example of this mount type is the 30mm mount designed by the Vortex Optics brand. It generally costs around $250 USD
Sealing and Gas Purging for Optic Tubes
Moisture inside your rifle optic can destroy a day on the range and your costly optic by resulting in fogging and making residue within the scope tube. Many scopes protect against wetness from entering the scope tube with a series of sealing O-rings which are waterproof. Typically, these water-resistant optics can be submerged within 20 or 30 feet of water before the water pressure can push moisture past the O-rings. This should be sufficient wetness prevention for common use rifles for hunting and sporting purposes, unless you intend on taking your rifle on boats and are worried about the optic still working if it falls overboard and you can still retrieve the rifle.
Rifle Glass Gas Purging
Another component of avoiding the buildup of wetness within the rifle optic’s tube is filling the tube with a gas like nitrogen. Given that this area is already taken up by the gas, the scope is less affected by temperature level changes and pressure variations from the outdoor environment which may potentially permit water vapor to permeate in around the seals to fill the void which would otherwise exist. These are good qualities of a decent rifle scope to seek out.