Description
Last update on March 27, 2023 // Source: Amazon API
Rifle Scope Product Details
Osprey Global TA10-40x50IRF Illuminated Rangefinder Reticle 30mm-Tube Riflescope, Matte Black (10-40x50mm)
Designed for long range shooting with a generous eye relief. Epoxy is used on all Osprey tactical scopes to ensure they handle the larger caliber rifles. Be ready for your next hunt or competition with this exceptional scope.
Rifle Scope Product Features
Length: 13.82-Inch, weight: 23.4-Ounce, tube: 30mm
Objective: 50mm, eye relief: 5.9 to 3.14-Inch, MOA: 1/8-Inch
Reticle: rangefinder, magnification: 4-16, illumination: red, blue, green
Comes with ring mounts and dust covers
Fog-proof, shock-proof and water-proof
About the Osprey Global Manufacturer
Osprey Global is a premium supplier for weapon scopes, optics, mounting solutions, and other accessories used for guns like rifles and long guns. They style and supply their products choosing materials which are durable and long lasting. This includes the Osprey Global TA10-40x50IRF Illuminated Rangefinder Reticle 30mm-Tube Riflescope, Matte Black (10-40x50mm) by Osprey Global. For additional shooting goods, visit their website.
Information Glass
Rifle scopes allow you to precisely aim a rifle at various targets by aligning your eye with the target over a distance. They accomplish this through magnifying the target by making use of a set of lenses within the scope. The scope’s positioning can be adapted for the consideration of various environmental elements like wind and elevation decreases to account for bullet drop.
The scope’s function is to help shooters understand precisely where the bullet will hit based upon the sight picture you are seeing with the scope as you line up the scope’s crosshair or reticle with the intended point of impact. Many contemporary rifle scopes and optics have around 11 parts which are arranged internally and outside of the scope. These optic pieces consist of the rifle scope’s body, lenses, adjustment dials, objective focus rings, and other components. Learn about the eleven parts of rifle optics.
Rifle Optic Types
Rifle scopes can be either “first focal plane” or “second focal plane” type of optics. Selecting the perfect type of rifle scope is based on what type of shooting you plan on doing.
First Focal Plane Optic Info
First focal plane optics (FFP) include the reticle in front of the zoom lens. This induces the reticle to increase in size based on the amount of magnification being used. The benefit is that the reticle measurements are the same at the enhanced range as they are at the non magnified distance. For example, one tick on a mil-dot reticle at 100 yards without any “zoom” is still the corresponding tick at one hundred yards with 5x “zoom”. These kinds of scopes are beneficial for:
- Quick acquisition, long distance types of shooting
- Shooting scenarios where computations are marginal
- Experienced shooters who have an idea for their aim point “hold over” and also “lead” ratios for their long guns
- Shooters who do not mind the reticle is enlarged and occupies more visual sight area than a SFP reticle
Second Focal Plane Glass Details
Second focal plane optics (SFP) come with the reticle behind the zoom lens. This triggers the reticle to remain at the exact same size in relation to the quantity of zoom being used. The end result is that the reticle dimensions adjust based on the magnification applied to shoot over longer distances due to the fact that the reticle measurements present distinct increments which fluctuate with the magnification. In the FFP example with the SFP optic, the 5x “zoom” one hundred yard tick would be 1/5th of the non “zoom” tick reticle measurement. These varieties of glass are useful for:
- Far away styles of shooting where shooters have more time to make ballistic computations
- Shooting where most shots happen within shorter spaces and ranges
- Shooters who would like a clearer optic sight picture with less room taken up by the larger size FFP reticle
Ins and Outs of Optic Zoom
The quantity of zoom a scope supplies is figured out by the size, density, and curvatures of the lenses inside of the rifle scope. The magnification of the scope is the “power” of the scope.
Single Power Lens Rifle Glass
A single power rifle optic or scope will have a magnification 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 fluctuate since it is a fixed power scope.
Adjustable Power Lens Optics
Variable power rifle scopes can be changed between magnification levels. These types of scopes will list the zoom level in a format like 2-10×32. These numbers mean the magnification of the scope can be changed in between 2x and 10x power. This also utilizes the power levels in-between 2 and 10. The power modification is achieved by employing 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 power levels and the distances where they may be effectively used. Remember that higher magnification optics and scopes will not be as practical as lower powered optics since excessive zoom can be a bad thing. The same concept goes for extended ranges where the shooter needs increased power to see where to best aim the rifle.
Rifle Glass Lens Covering
All contemporary rifle optic lenses are covered in special coatings. There are different types and qualities of finishings. When looking at luxury rifle targeting systems, Lens finishing can be a crucial component of defining the capability of the rifle. The glass lenses are one of the most vital pieces of the glass since they are what your eye looks through while sighting a rifle in on the point of impact. The covering on the lenses safeguards the lens surface and also assists with anti glare capabilities from refracted daylight and color recognition.
Info on Rifle Optic Lens Coatings – HD Versus ED
Some optic companies will also use “HD” or high-definition glass finishings that employ different processes, rare earth compounds, polarizations, and elements to enhance different colors and viewable definition through lenses. This high-definition covering is typically used with greater density lens glass which brings down light’s opportunity to refract through the lens glass. Some scope vendors use “HD” to refer to “ED” suggesting extra-low dispersion glass. ED handles how certain colors are represented on the chroma spectrum and the chromatic difference or aberration which is similarly called color distortion or fringing. Chromatic aberration may be obvious around items with well defined shapes as light hits the item from specific angles.
Single Coating Versus Multi-Coating
Different optic lenses can even have various coatings applied to them. All lenses typically have at least some kind of treatment or coating applied to them prior to being used in a rifle scope or optic. Since the lens isn’t simply a raw piece of glass, they require performance enhancing coatings. It becomes 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 light (full light VS shade), and other shooting conditions.
This lens treatment can protect the lens from scratches while reducing glare and other less helpful things experienced in the shooting environment while sighting in with the scope. The quality of a single covered lens depends on the scope producer and how much you paid for it.
Some scope makers also make it a point to specify if their optic lenses are coated or “multi” coated. Being “better” depends on the manufacturer’s lens treatment innovation and the quality of products used in constructing the rifle scope.
Hydrophobic Lens Coverings
Water on an optical lens does not improve maintaining a clear sight picture through an optic in any way. Lots of top of the line or high-end scope makers will coat their lenses with a hydrophilic or hydrophobic covering. The Steiner Optics Nano-Protection is a good example of this type of treatment. It deals with the surface of the Steiner optic lens so the H2O molecules can not bind to it or create surface tension. The result is that the water beads roll off of the scope to keep a clear, water free sight picture.
Rifle Glass Installation Options
Mounting approaches for scopes are available in a couple of choices. There are the standard scope rings which are separately installed to the scope and one-piece scope mounts which cradle the scope. These different types of mounts also usually come in quick release versions which use manual levers which enable rifle shooters to quickly install and dismount the optics.
Scope Mounts with Hex Key Rings
Normal, clamp style 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 made from 7075 T6 billet aluminum which are created for long range accuracy shooting. This type of scope mount is wonderful for rifles which require a resilient, rock solid mount which will not move no matter how much the scope is moved or abused.
Glass Mounts with Quick-Release Cantilever Rings
These kinds of quick-release rifle scope mounts can be used to rapidly take off 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 similar designed mount. The quick detach mount style is CNC machined from anodized 6061 T6 aluminum and the mounting levers fasten nicely to a flat top type Picatinny rail. This allows the scope to be sighted in while on the rifle, removed from the rifle, and remounted back on the rifle while preserving precision. These kinds of mounts come in practical for rifles which are moved around a lot, to take off the scope glass from the rifle for protection, or for optics which are utilized between a number of rifles. An example of this mount type is the 30mm mount from Vortex Optics. It generally costs around $250 USD
Scope Tube Sealing and Gas Purging
Moisture inside your rifle optic can wreck a day on the range and your costly optic by inducing fogging and producing residue within the scope tube. Many scopes prevent humidity from entering the optical tube with a series of sealing O-rings which are waterproof. Generally, these water resistant optics can be submerged beneath 20 or 30 feet of water before the water pressure can force moisture past the O-rings. This should be more than enough moisture content prevention for common use rifles for hunting and sporting purposes, unless you anticipate taking your rifle boating and are concerned about the scope still functioning if it goes overboard and you can still rescue the gun.
Gas Purged Glass Tubes
Another element of preventing the buildup of moisture inside of the rifle optic’s tube is filling the tube with a gas like nitrogen. Considering that this area is currently taken up by the gas, the optic is less altered by climate shifts and pressure differences from the external environment which might possibly enable water vapor to seep in around the seals to fill the vacuum which would otherwise exist. These are good qualities of a decent rifle scope to look for.
