Description
Last update on February 2, 2023 // Source: Amazon API
Rifle Scope Product Details
Vortex Optics Crossfire II Adjustable Objective, Second Focal Plane, 1-inch Tube Riflescopes
Rifle Scope Product Features
About this item
The 4-12×40 Adjustable Objective Crossfire II riflescope is one of many configurations in the Crossfire II line. The Dead-Hold BDC reticle is good for hunting/shooting at varying ranges where estimating holdover is a concern
The adjustable objective provides image focus and parallax removal to the shooter while anti-reflective, fully multi-coated lenses provide bright and clear views
With long eye relief and an ultra-forgiving eye box, you’ll be able to quickly get a sight picture and acquire your target. The fast focus eyepiece allows quick and easy reticle focusing
Capped reset turrets are finger adjustable with MOA clicks that can be reset to zero after sighting in
A single piece tube constructed from aircraft grade aluminum ensures strength and shockproof performance. O-ring sealed and nitrogen purged, the Crossfire II delivers waterproof and fogproof performance
About the Vortex Optics Scope Maker
Vortex Optics is a premium manufacturer for long gun scopes, optics, mounts, and other components used for guns like rifles and long guns. They innovate and build their products using materials which are resilient and long lasting. This includes the Vortex Optics Crossfire II Adjustable Objective, Second Focal Plane, 1-inch Tube Riflescopes by Vortex Optics. For additional shooting items, visit their site.
Rifle Optic Information
Rifle scopes allow you to exactly align a rifle at different targets by lining up your eye with the target at range. They do this through magnification by employing a set of lenses inside the scope. The scope’s alignment can be adapted for the consideration of many natural elements like wind and elevation decreases to make up for bullet drop.
The scope’s function is to help shooters understand precisely where the bullet will hit based on the sight picture you are viewing through the optic as you line up the scope’s crosshair or reticle with the intended point of impact. Many contemporary rifle scopes have about eleven parts which are arranged inside and on the exterior of the scope body. These scope parts include the rifle scope’s body, lenses, adjustment dials, objective focus rings, and other components. Learn about the eleven parts of rifle optics.
The Varieties of Rifle Scopes
Rifle scopes can be either “first focal plane” or “second focal plane” type of scopes. Finding the optimal type of rifle optic depends on what type of shooting you plan to do.
About First Focal Plane Optics
Focal plane scopes (FFP) include the reticle in front of the zoom lens. These types of scopes are useful for:
- Quick acquisition, far away kinds of shooting
- Shooting situations where calculations are very little
- Experienced shooters who recognize their aim point “hold over” and also “lead” correlations for their long gun
- Shooters who don’t mind the reticle is bigger and requires more visual eyesight room than a SFP reticle
Info on Second Focal Plane Optics
Second focal plane optics (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 reticle measurement would be 1/5th of the non “zoom” tick reticle measurement.
- Far away forms of shooting where shooters have additional time to make ballistic calculations
- Shooting where most shots take place within much shorter distances and ranges
- Shooters who like a clearer optic picture without room taken up by the larger size FFP reticle
Optic Zoom
The measure of scope magnification you need on your optic is based on the style of shooting you want to do. Almost every type of rifle optic gives some amount of zoom. The level of zoom a scope delivers is identified by the size, thickness, and curves of the lens glass within the rifle scope. The magnification level of the scope is the “power” of the scope. This signifies what the shooter is observing through the scope is amplified times the power element of what can typically be seen by human eyes.
Fixed Power Lens Optic Details
A single power rifle scope or optic will have a magnification number designator like 4×32. This suggests the zoom power of the scope is 4x power while the objective lens is 32mm. The zoom of this kind of scope can not change since it is a set power scope.
Variable Power Lens Scopes
Variable power rifle scopes use variable power levels. The power adjustment is achieved by making use of the power ring part of the scope near the rear of the scope by the eye bell.
Rifle Optic Power Level and Ranges
Here are some suggested scope powers and the ranges where they may be successfully used. Remember that higher power scopes and optics will not be as efficient as lower magnification level scopes since excessive magnification can be a detractor. The exact same concept goes for extended distances where the shooter needs sufficient power to see exactly where to properly aim the rifle.
About Lens Finish
All cutting-edge rifle scope lenses are coated. Lens coating is a crucial element of a rifle’s setup when considering high end rifle optics and scope equipment.
ED Versus HD Rifle Optics
Some scope makers also use “HD” or high-definition lens coatings which use different processes, chemicals, polarizations, and components to draw out separate colors and viewable definition through the lens. Some scope makers use “HD” to refer to “ED” indicating extra-low dispersion glass.
Rifle Scope Lens Single Covering Versus Multi-Coating
Different optic lenses can even have various coatings applied to them. All lenses normally have at least some kind of treatment or finish applied to them before being used in a rifle scope or optic assembly. Due to the fact that the lens isn’t simply a raw piece of glass, they require performance enhancing coatings. It is part of the finely tuned optic. It needs to have a finish applied to it so that the lens will be optimally functional in lots of kinds of environments, degrees of sunshine (full light VS shade), and other shooting conditions.
This lens treatment can protect the lens from scratches while lowering glare and other less useful things experienced in the shooting environment while sighting in with the scope. The quality of a single coated lens depends on the scope producer and how much you paid for it.
Some scope producers also make it a point to define if their optic lenses are layered or “multi” covered. Being “much better” depends on the manufacturer’s lens treatment innovation and the quality of materials used in developing the rifle scope.
Anti-water Finishing for Rifle Glass
Water on an optic’s lens doesn’t improve keeping a clear sight picture through a scope at all. Many top of the line or premium scope manufacturers will coat their lenses with a hydrophilic or hydrophobic finishing. The Steiner Optics Nano-Protection is a good example of this kind of treatment. It treats the exterior of the Steiner optic lens so the water molecules can not bind to it or produce surface tension. The outcome is that the water beads slide off of the scope to keep a clear, water free sight picture.
Scope Installing Options
Installing solutions for scopes are available in a few choices. There are the basic scope rings which are separately mounted to the scope and one-piece scope mounts which cradle the scope. These various kinds of mounts also typically come in quick release versions which use toss levers which permit rifle operators to rapidly install and remove the glass.
Hex Key Optic Ring Mounting Solutions
Basic, clamp-on type mounting optic rings use hex head screws to mount to the flattop style Picatinny scope mounting rails on rifles. These kinds of scope mounts use a pair of independent rings to support the scope, and are normally made from 7075 T6 billet aluminum which are manufactured for long distance precision shooting. This form of scope mount is good for rifle systems which are in need of a durable, hard use mount which will not change despite just how much the scope is moved about or jarring the rifle takes. These are the style of mounts you should get for a faithful scope setup on a long distance hunting or competitors long gun which will hardly ever need to be modified or recalibrated. Blue 242 Loctite threadlocker can also be used on the mount’s screws to stop the hex screws from wiggling out after they are installed safely in position. An example of these rings are the 30mm type made by the Vortex Optics company. The set normally costs around $200 USD
Quick-Release Cantilever Rifle Scope Ring Mounts
These types of quick-release rifle scope mounts can be used to rapidly connect and remove a scope from a rifle before reattaching it to a different rifle. Multiple scopes can even be swapped out if they all use a compatible style mount. These types of mounts are convenient for rifles which are transferred a lot, to remove the optic from the rifle for protecting the scope, or for scopes which are used between several rifles or are situationally focused.
Info Around Rifle Scope Tube Sealing and Gas Purging
Wetness inside your rifle optic can spoil a day on the range and your costly optic by inducing fogging and creating residue inside of the scope tube. The majority of optics protect against wetness from going into the scope tube with a series of sealing O-rings which are waterproof. Generally, these water-resistant optics can be immersed beneath 20 or 30 feet of water before the water pressure can push moisture past the O-rings. This should be sufficient wetness prevention for standard use rifles, unless you plan on taking your rifle boating and are concerned about the scope still performing if it goes overboard and you can still retrieve the rifle.
Gas Purged Scope Tubes
Another part 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 space is already taken up by the gas, the scope is less affected by temp alterations and pressure differences from the external environment which might potentially enable water vapor to leak in around the seals to fill the void which would otherwise be there. These are good qualities of a good rifle scope to seek out.