Rifle Scope Product Details
LETRA Rifle Scope 3-9×40 Duplex Crosshair R4 Reticle with 20mm Free Mounts
Get a premium quality product while spending only a fraction of the cost. Our superior riflescope features unsurpassed light transmission, uncompromising mechanical performance and unbeatable optical clarity. Reflex (cross) reticle gives a more natural acquisition between the reticle and target; magnifications from 3 times up to 9 times. Water proof and fog proof, this riflescope also comes with 2 free mounts and flip cover. Lens flip cover on this riflescope offers you ultimate maneuverability and helps to protect both the objective and ocular lenses of the scope while keeping lenses clean. Take our riflescope with you on your next hunting trip!Compatibility: This part can be only used with bolt-action Rifles
1x 3-9×40 optics R4 reticle rifle scope
2x free mounts
1x lens covers
Material: Aircraft-Grade Aluminum Alloy
Objective Diameter: 1.57″/40mm
Tube Diameter: 1″/25.4mm
Exit Pupil: 0.2″-0.67″/5.1mm-16.9mm
Net Weight: Approx. 0.76lb/345g
Only offer 20mm rail mount
Rifle Scope Product Features
Magnifications from 3X up to 9X
Lens flip cover on this riflescope offers you ultimate maneuverability and helps to protect both the objective and ocular lenses of the scope while keeping lenses clean
O-ring sealing and nitrogen filling ensures 100% water and fog-proof
Gives the shooter a more natural acquisition between the reticle and the target
Made of aerospace aluminum alloy, durable and versatile
About the Letra Brand
Letra is a premium manufacturer for firearm scopes, optics, mounts, and other components used for guns like rifles and long guns. They innovate and supply their products by using elements which are long lasting and durable. This includes the LETRA Rifle Scope 3-9×40 Duplex Crosshair R4 Reticle with 20mm Free Mounts by Letra. For additional shooting items, visit their site.
What You Need to Know About Rifle Scopes
Rifle scopes permit you to specifically aim a rifle at various targets by aligning your eye with the target at range. They accomplish this through magnifying the target by employing a series of lenses within the scope. The scope’s alignment can be adapted to account for numerous natural considerations like wind and elevation increases or decreases to make up for bullet drop.
The scope’s purpose is to help shooters understand precisely where the bullet will hit based on the sight picture you are viewing through the scope as you line up the scope’s crosshair or reticle with the target. A lot of contemporary rifle scopes have around eleven parts which are arranged inside and externally on the optic. These scope parts include the rifle scope’s body, lenses, elevation turrets, focus rings, and other elements. See all eleven parts of optics.
Rifle Glass Styles
Rifle scopes can be either “first focal plane” or “second focal plane” type of optics. Finding the optimal type of rifle scope is based on what type of shooting you plan on doing.
First Focal Plane Scopes
Focal plane scopes (FFP) include the reticle in front of the magnification lens. These kinds of scopes are useful for:
- Quick acquisition, far away kinds of shooting
- Shooting situations where computations are small
- Experienced shooters who understand their target “hold over” plus “lead” equations for their firearm
- Shooters who do not mind the reticle is enlarged and occupies more visual eyesight space than a SFP reticle
Second Focal Plane Optics
Second focal plane optics (SFP) include the reticle to the rear of the zoom lens. In the FFP example with the SFP scope, the 5x “zoom” one hundred yard tick reticle measurement would be 1/5th of the non “zoom” tick measurement.
- Far away styles of shooting where shooters have extra time to make ballistic estimations
- Shooting where most shots occur within much shorter ranges and proximities
- Shooters who select a clearer optic picture without room taken up by the bigger FFP reticle
Details on Optic Zoom
The measure of scope zoom you need depends upon the form of shooting you wish to do. Nearly every kind of rifle glass offers some level of zoom. The quantity of zoom a scope supplies is identified by the size, thickness, and curves of the lenses inside of the rifle scope. The magnification of the scope is the “power” of the glass. This suggests what the shooter is aiming at through the scope is amplified times the power element of what can typically be seen by human eyes.
About Fixed Power Lens Glass
A single power rifle scope or optic comes with a magnification number designator like 4×32. This indicates the magnification power of the scope is 4x power while the objective lens is 32mm. The zoom of this kind of optic can not adjust because it is a set power scope.
Adjustable Power Lens Scopes
Variable power rifle scopes have adjustable power. It will list the zoom amount in a configuration such as 2-10×32. These numbers imply the magnification of the scope could be changed in between 2x and 10x power. This additionally utilizes the powers in-between 2 and 10. The power manipulation is achieved using the power ring part of the scope near the rear of the scope by the eye bell.
The Power Level and Range of Rifle Optics
Here are some recommended scope powers and the distances where they may be efficiently used. High power optics will not be as beneficial as lower magnification glass considering too much zoom can be a bad thing. The same goes for longer ranges where the shooter needs sufficient power to see precisely where to properly aim the rifle.
Info on Lens Coating
All top of the line rifle optic lenses are layered. Lens covering can be a significant aspect of a shooting platform when purchasing high end rifle optics and scope equipment.
About Lens Coatings – HD Versus ED
Some scope brands likewise use “HD” or high-definition lens coatings which use various procedures, components, polarizations, and chemicals to draw out various colors and viewable definition through the lens. Some scope makers use “HD” to refer to “ED” indicating extra-low dispersion glass.
Single Optic Lens Finishing Versus Multi-Coating
Different scope lenses can even have different coverings applied to them. All lenses typically have at least some kind of treatment or finishing applied to them prior to being used in a rifle scope or optic. Due to the fact that the lens isn’t simply a raw piece of glass, they require performance enhancing coatings. It becomes part of the carefully tuned optic. It requires a coating to be applied to it so that the lens will be efficiently functional in numerous kinds of environments, degrees of sunshine (full light VS shaded), and other shooting conditions.
This lens treatment can offer protection to 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 coated lens depends on the scope maker and how much you paid for it.
Some scope producers also make it a point to specify if their optic lenses are layered or “multi” coated. Being “much better” depends on the maker’s lens treatment technology and the quality of materials used in constructing the rifle scope.
Anti-water Coating for Glass
Water on a scope lens does not support keeping a clear sight picture through an optic at all. Lots of top of the line or premium scope makers will coat their lenses with a hydrophobic or hydrophilic finishing. The Steiner Optics Nano-Protection is a good example of this kind of treatment. It deals with the surface area of the Steiner optic lens so the H2O particles can not bind to it or create surface tension. The result is that the water beads sheet off of the scope to preserve a clear, water free sight picture.
Choices for Installing Rifle Scopes on Long Guns
Installing solutions for scopes come in a couple of options. There are the basic scope rings which are separately installed to the scope and one-piece scope mounts which cradle the scope. These various kinds of mounts also normally come in quick release versions which use manual levers which allow rifle operators to rapidly install and remove the optics.
Hex Key Glass Ring Mounts
Normal, clamp style 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 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 fine for rifles which require a resilient, sound mounting solution which will not move no matter how much the scope is moved or abused.
Optic Mounting Solutions with Quick-Release Cantilever Rings
These kinds of quick-release rifle scope mounts can be used to rapidly remove a scope from a rifle and reattach it to a different rifle. Multiple scopes can also be switched out if they all use a complementary style mount. The quick detach mount style is CNC machined from anodized 6061 T6 aluminum and the mounting levers connect securely to a flat top style Picatinny rail. This lets the scope to be sighted in while on the rifle, taken off of the rifle, and remounted while maintaining the original sighting settings. These kinds of mounts come in practical for rifles which are transferred between vehicles a lot, to take off the glass from the rifle for protection, or for aiming systems which are adopted in between numerous rifles. An example of this mount style is the 30mm mount designed by the Vortex Optics brand. It usually costs around $250 USD
Sealing and Gas Purging for Scope Tubes
Wetness inside your rifle scope can mess up a day of shooting and your costly optic by bringing about fogging and creating residue inside of the scope tube. Many scopes avoid moisture from getting in the scope tube with a system of sealing O-rings which are waterproof.
What to Know About Rifle Glass Tube Gas Purging
Another element of avoiding the buildup of moisture inside of the rifle optic tube is filling the tube with a gas like nitrogen. Because this space is currently taken up by the gas, the glass is less affected by temperature alterations and pressure variations from the external environment which could potentially permit water vapor to permeate in around the seals to fill the vacuum which would otherwise be there. These are good qualities of a good rifle scope to look for.