Description
Rifle Scope Product Details
Kalinka Optics POSP 4-12×42-1000m Rangefinder, AK version
POSP 4-12x42V – Sniper Rifle Scope with reticle illumination Range Finder .Specification: Visible magnification: 4-12x Angular field of view, deg: 4-2.10′ Clear aperture of the lens: 40 mm Exit pupil diameter: 10-3.3 mm Illuminated reticle: built-in red Supply voltage: 3V (2×1.5v D357, AG13, LR 44) Operating temperature range: -50o C +50o C Overall dimensions: 357x68x78 mm Weight: 0.9 kg POSP’s feature professionally ground, crystal clear optics, nitrogen filling to prevent lens fogging, and larger diameter tubes for improved light gathering under the most severe conditions.It is waterproof and can be used in any climate condition. It comes with a high quality mil-spec finish and rubber lens cap, eye piece, and nylon carrying case. The AK V clamp can easily be mounted to any of these rifles with the standard side rail: AK, AKM, Vepr, Saiga, K-var, KBI, Hesse, Century and Arsenal USA copies, Romak1/2, SLR-93, SLR-95, SLR-101, MK-11, SAR, WUM, SA85M, WASR (check for installed rail), Maddi, Norinco and Poly-Tech copies and many more models.
Rifle Scope Product Features
Red illuminated reticle which allows you to make perfect kill shots in dusk conditions
Professionally ground, crystal clear optics, nitrogen filling to prevent lens fogging, and larger diameter tubes for improved light gathering under the most severe conditions.
Waterproof and can be used in any climate condition
High quality mil-spec finish,rubber lens cap, eye piece, and nylon carrying case
The 1000 meter Simonov height based gradient (choke style) rangefinder has holdover aiming marks for quick reaction shooting
About the PRC Scope Maker
PRC is a premium manufacturer for rifle scopes, optics, mounts, and other add-ons used for firearms like rifles and long guns. They create and make their mounts and related products working with materials which are long lasting and durable. This includes the Kalinka Optics POSP 4-12×42-1000m Rangefinder, AK version by PRC. For more shooting items, visit their site.
Rifle Optic Facts
Rifle scopes permit you to specifically aim a rifle at various targets by lining up your eye with the target over a distance. They do this through zoom using a set of lenses within the scope. The scope’s alignment can be adapted for consideration of different ecological factors like wind speed and elevation increases to make up for bullet drop.
The scope’s purpose is to help the shooter understand precisely where the bullet will hit based upon the sight picture you are seeing through the optic as you align the scope’s crosshair or reticle with the target. Most modern-day rifle optics have around eleven parts which are located inside and on the exterior of the optic. These optic pieces include the rifle scope’s body, lenses, modification dials or turrets, objective focus rings, and other parts. See all eleven parts of optics.
Rifle Scope Types
Rifle scopes can be either “first focal plane” or “second focal plane” type of scopes. Picking the best type of rifle glass is based around what type of shooting you plan on doing.
First Focal Plane Optic Details
First focal plane glass (FFP) come with the reticle ahead of the magnifying lens. This triggers the reticle to increase in size based upon the extent of zoom being used. The benefit is that the reticle measurements are the same at the amplified distance as they are at the non amplified distance. One tick on a mil-dot reticle at 100 yards with no “zoom” is still the very same tick at one hundred yards with 5x “zoom”. These types of scopes are practical for:
- Quick acquisition, far away types of shooting
- Shooting circumstances where computations are marginal
- Experienced shooters who recognize their aim point “hold over” and “lead” correlations for their long guns
- Shooters who don’t mind the reticle is enlarged and uses up more visual sight room than a SFP reticle
Info on Second Focal Plane Scopes
Second focal plane scopes (SFP) come with the reticle behind the magnification 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 kinds of shooting where shooters have additional time to make ballistic computations
- Shooting where most shots occur within much shorter proximities and ranges
- Shooters who would like a clearer optic sight picture with less area used up by the enlarged FFP reticle
Glass Zoom
The quantity of zoom a scope provides is figured out by the size, thickness, and curvatures of the lenses inside of the rifle scope. The zoom of the scope is the “power” of the scope.
Info About Single Power Lens Glass
A single power rifle optic or scope comes with 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 adjust since it is a fixed power optic.
About Variable Power Lens Glass
Variable power rifle scopes have adjustable power. These types of scopes will list the zoom amount in a format such as 2-10×32. These numbers mean the zoom of the scope can be changed in between 2x and 10x power. This always involves the powers in-between 2 and 10. The power adaptation is achieved utilizing the power ring part of the scope near the rear of the scope by the eye bell piece.
Power Levels and Range
Here are some suggested scope power settings and the ranges where they can be successfully used. High power glass will not be as useful as lower magnification level rifle scope glass considering that too much magnification can be a negative aspect depending on your shooting distance. The exact same concept relates to extended ranges where the shooter needs increased power to see precisely where to best aim the rifle.
Lens Finish for Scopes
All contemporary rifle scope lenses are coated. There are various types and qualities of coatings. When considering high end rifle targeting units, Lens finish can be an important aspect of a rifle. The glass lenses are among the most important parts of the scope because they are what your eye looks through while sighting a rifle in on the target. The finishing on the lenses safeguards the lens surface area and assists with anti glare capabilities from refracted direct sunlight and color perception.
HD Versus ED Optic Lens Coatings
Some glass manufacturers will also use “HD” or high-definition glass finishes which use different processes, aspects, compounds, and polarizations to enhance various colors and viewable definition through the lens. This high-definition finishing is normally used with increased density lens glass which brings down light’s ability to refract by means of the lens glass. Some scope producers use “HD” to describe “ED” suggesting extra-low dispersion glass. ED handles how colors are presented on the chroma spectrum and the chromatic deviance or aberration which is similarly called color distortion or fringing. Chromatic aberration is often obvious around things with hard outlines as light hits the object from specific angles.
Single Coating Versus Multi-Coating
Various scope lenses can also have various finishes applied to them. All lenses generally have at least some type of treatment or coating applied to them before being used in a rifle scope or optic assembly. This is because the lens isn’t just a raw piece of glass. It is part of the finely tuned optic. It must have a finishing applied to it so that it will be optimally functional in numerous kinds of environments, degrees of sunlight (full light VS shade), and other shooting conditions.
This lens treatment can offer protection to the lens from scratches while minimizing 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 manufacturer and how much you paid for it.
Some scope makers likewise make it a point to define if their optic lenses are coated or “multi” coated. This indicates the lens has had multiple treatments applied to the surfaces. If a lens receives multiple treatments, it can prove that a producer is taking multiple actions to fight various environmental elements like an anti-glare covering, a scratch resistant anti-abrasion finishing, followed by a hydrophilic coating. This additionally doesn’t necessarily mean the multi-coated lens will perform much better than a single covered lens. Being “better” depends on the maker’s lens treatment techniques and the quality of glass used in constructing the rifle scope.
Hydrophobic Coating for Rifle Scopes
Water on a scope lens does not support maintaining a clear sight picture through a scope whatsoever. Lots of top of the line and high-end optic manufacturers will coat their lenses with a hydrophobic or hydrophilic finish. The Steiner Optics Nano-Protection is a fine example of this kind of treatment. It treats the exterior of the Steiner optic lens so the water particles can not bind to it or produce surface tension. The result is that the water beads sheet off of the scope to preserve a clear, water free sight picture.
Rifle Glass Installing Options
Installing options for scopes are available in a couple of options. There are the standard scope rings which are separately mounted to the optic and one-piece mounts which cradle the scope. These various types of mounts also typically come in quick release variations which use throw levers which allow rifle operators to rapidly install and remove the optics.
Hex Key Scope Rings
Normal, clamp style mounting scope rings use hex head screws to mount to the flattop style Picatinny scope mount rails on rifles. These types of scope mounts use two different rings to support the optic, and are often made from 7075 T6 billet aluminum which are developed for long range precision shooting. This type of scope mount is excellent for rifles which require a long lasting, rock solid mount which will not move no matter how much the scope is moved or abuse the rifle takes.
Quick-Release Cantilever Rifle Optic Ring Mounting Solutions
These types of quick-release rifle scope mounts can be used to rapidly detach a scope and connect it to a different rifle. Numerous scopes can even be swapped out if they all use a compatible style mount. These types of mounts come in handy for rifles which are transferred a lot, to remove the optic from the rifle for protecting the scope, or for scopes which are used in between multiple rifles.
Rifle Glass Tube Sealing and Gas Purging
Moisture inside your rifle scope can spoil a day of shooting and your expensive optic by causing fogging and creating residue within the scope’s tube. Many optics protect against moisture from going into the optical tube with a system of sealing O-rings which are water resistant. Normally, these water-resistant scopes can be immersed within 20 or 30 feet of water before the water pressure can force moisture past the O-rings. This should be plenty of moisture avoidance for common use rifles, unless you anticipate taking your rifle on a boat and are concerned about the optic still working if it goes over the side and you can still retrieve the rifle.
Gas Purged Glass Tubes
Another part of preventing the accumulation of moisture within the rifle optic’s tube is filling the tube with a gas like nitrogen. Considering that this area is already taken up by the gas, the scope is less affected by temp alterations and pressure differences from the outdoor environment which might potentially permit water vapor to leak in around the seals to fill the vacuum which would otherwise be there. These are good qualities of a good rifle scope to seek out.
