Last update on June 6, 2023 // Source: Amazon API
Rifle Scope Product Details
Sightmark 1-4×20 SHR-223 Riflescope
The nitrogen-filled, IP67 waterproof, shock proof, fog proof Sightmark 1-4×20 SHR-223 Riflescope gets you on target with precision optical quality packed in an elite, compact body. Built specifically for.223-cal. modern sporting rifles with a rugged 6061-T6 30mm tube and scaled perfectly for lightweight, fast-action professional and competition shooting, the Riflescope boasts an SHR-223 finely etched reticle, complete with red-illumination and calibrated sub tension lines for.223-cal. bullet drop compensation. 10 Reticle illumination brightness settings provide the intensity for daylight to no-light shooting. The generous 4.5″ eye relief provides shooters with a robust field of view while an advanced, fully-multicoated, scratch resistant lens system, 1-4x magnification and an easy-to-focus rapid power rotation eyepiece work together to give razor sharp, lightning quick target acquisition. Whether your rifle is all business, all competition or all fun, exposed pop-up locking turrets deliver precise 1/2″ per click windage and elevation adjustments for superb tracking. The Sightmark1-4×20 SHR-223 Riflescope is the perfect close- to mid-range second-focal-plane-optic to make your mark.
Rifle Scope Product Features
Precision, compact .223-Calibrated Riflescope
Generous 4.5in Eye relief
Exposed pop-up locking turrets
Rapid rotation Eyepiece
10 brightness settings for perfect intensity
BDC reticle calibrated for .223 55 and 62 grain
Exposed, pop-up locking turrets
Rapid Power Rotation eyepiece
Digital reticle illumination
Generous 4.2″ eye relief
Side focus adjustment for parallax removal
Fully multi-coated optics
Single-piece, 30mm tube
What comes in the box
Sightmark SHR-223 Riflescope
Sightmark Riflescopes target the leading edge of premium, tactical operation optics. Whether your work, competition or passion keeps you going with a modern sporting rifle at the ready, you can depend on the same demanding Sightmark quality you have come to expect in our riflescope lineup.
Built as tough as the professionals who trust Sightmark performance to get them back home to their families after a long, high-stakes day, Sightmark Riflescopes boast rugged yet lightweight, compact hard-anodized 6061-T6 aluminum tubes; premium, fully multi-coated lenses; digital reticle illumination; generous eye relief; rapid power rotation eyepiece; ultra-reliable shockproof, fogproof and IP67 waterproof performance.
Press the digital illumination switch to turn on reticle illumination. To cycle through the brightness settings, press the digital switch consecutive times until the desired brightness level is reached. Settings 1 through 8 are best for daytime use. Settings 9 and 10 are best for low light use. To turn off the reticle illumination, press and hold the digital switch for 3 seconds.
The shepherd reticle is calibrated for .223 Remington 55gr and 62gr and was designed for triple duty application: tactical, competition, and hunting. The duplex reticle was designed for coyote hunting and 3-gun competitions with a 100-yard zero. The design provides a fine central aiming crosshair at higher magnifications and holdovers for 200, 300, 400 and 500 yards. Those respective holdovers were designed to coincide with the average length of a coyote or width of IPSC target, allowing for ranging of your target.
Whole Eyepiece Rotates
Each variable power riflescope is equipped with the rapid power rotation eyepiece. By rotating the entire eyepiece, the magnification will change. This design allows the user to grab any part of the eyepiece to quickly change magnification. The magnification levels are noted on the front of the eyepiece. To increase magnification, turn the eyepiece clockwise. To decrease magnification, turn the eyepiece counter-clockwise.
1-4×20 SHR-223 Riflescope 1-4×20 SCR-300 Riflescope 3-12×32 SHR-223 Riflescope 3-12×32 SCR-300 Riflescope 5-20×40 SCR-308 Riflescope Sightmark 2.5×20 Scout Scope
Magnification (x) 1-4 1-4 3-12 3-12 5-20 2.5
Objective lens diameter (mm) 20 20 32 32 40 20
Parallax setting (yds) 100 100 100 100 25 – 50
Battery type CR2032 CR2032 CR2032 CR2032 CR2032 CR2032
Focal plane 2nd 2nd 2nd 2nd 2nd 2nd
Length/Width/Height (in) 8.7 x 2.9 x 2.2 8.7 x 2.9 x 2.2 11.6 x 2.9 x 2.2 11.6 x 2.9 x 2.2 12.8 x 3.6 x 2.2 7.6 x 2.4 x 1.7
Weight, oz 19.2 19.2 20.8 20.8 23.6 11.8
Reticle SHR-223 SCR-300 SHR-223 SCR-300 SCR-308 TDR
About the Sightmark Brand
Sightmark is a premium producer for long gun scopes, optics, mounts, and other accessories used for guns like rifles and long guns. They innovate and make their scopes, mounts, and related products making the most of elements which are durable and long lasting. This includes the Sightmark 1-4×20 SHR-223 Riflescope by Sightmark. For additional shooting goods, visit their site.
Rifle Glass Details
Rifle scopes permit you to precisely align a rifle at different targets by aligning your eye with the target over a distance. They do this through magnification by utilizing a series of lenses within the scope. The scope’s positioning can be dialed in to account for various ecological elements like wind and elevation decreases to make up for bullet drop.
The scope’s function is to help shooters understand exactly where the bullet will land based upon the sight picture you are seeing through the scope as you align the scope’s crosshair or reticle with the intended target. A lot of contemporary rifle scopes and optics have about 11 parts which are located inside and externally on the optic. These optic pieces consist of the rifle scope’s body, lenses, elevation turrets or dials, focus rings, and other components. See all eleven parts of an optic.
About Scope Varieties
Rifle scopes can be either “first focal plane” or “second focal plane” type of scopes. Selecting the finest type of rifle glass is based around what type of shooting you plan to do.
Info About First Focal Plane Optics
Focal plane scopes (FFP) feature the reticle in front of the zoom lens. These styles of scopes are beneficial for:
- Quick acquisition, long distance types of shooting
- Shooting situations where estimations are marginal
- Experienced shooters who understand their aim point “hold over” as well as “lead” equations for their weapon
- Shooters who do not mind the reticle is enlarged and takes up more visual sight space than a SFP reticle
Second Focal Plane Scopes
Second focal plane optics (SFP) include the reticle behind 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 styles of shooting where shooters have increased time to make ballistic estimations
- Shooting where most of the shots happen within shorter spaces and ranges
- Shooters who want a clearer optic sight picture without space used up by the larger size FFP reticle
Details on Glass Zoom
The quantity of scope magnification you need is based on the form of shooting you choose to do. Nearly every kind of rifle scope offers some amount of magnification. The amount of magnification a scope supplies is established by the diameter, thickness, and curves of the lens glass within the rifle scope. The zoom of the optic is the “power” of the scope. This signifies what the shooter is aiming at through the scope is amplified times the power element of what can usually be seen by human eyes.
Fixed Single Power Lens Optics
A single power rifle optic or scope will have a magnification number designator like 4×32. This indicates the magnification power of the scope is 4x power and the objective lens is 32mm. The zoom of this type of optic can not change considering that it is a fixed power optic.
Variable Power Lens Glass
Variable power rifle scopes can be modified between magnified settings. The power adjustment is performed by making use of the power ring part of the scope near the rear of the scope by the eye bell.
Power Levels and Range
Here are some suggested scope power levels and the distances where they could be successfully used. Bear in mind that high power optics and scopes will not be as practical as lower powered glass since increased magnification can be a detractor. The very same idea applies to longer distances where the shooter needs increased power to see precisely where to best aim the rifle.
About Lens Finishes
All state-of-the-art rifle optic lenses are coated. Lens finishing can be an important element of a shooting platform when purchasing high end rifle optics and scope systems.
Info on Optic Lens Coatings – HD Versus ED
Some scope makers likewise use “HD” or high-definition lens coverings which use different techniques, polarizations, elements, and chemicals to draw out various colors and viewable definition through the lens. Some scope makers use “HD” to refer to “ED” implying extra-low dispersion glass.
Details on Single Covering Versus Multi-Coating
Various optic lenses can also have various finishings used to them. All lenses generally have at least some type of treatment or coating used to them before they are used in a rifle scope or optic.
Single coated lenses have a treatment applied to them which is typically a protective and boosting multi-purpose treatment. This lens treatment can preserve the lens from scratches while minimizing glare and other less advantageous things experienced in the shooting environment while sighting in with the optic. The quality of a single covered lens depends upon the scope manufacturer and the amount you spent for it. The scope’s maker and cost are indications of the lens quality.
Some scope manufacturers likewise make it a point to specify if their optic lenses are covered or “multi” covered. This means the lens has had multiple treatments applied to the surfaces. If a lens gets multiple treatments, it can prove that a maker is taking multiple actions to fight various environmental aspects like an anti-glare covering, a scratch resistant anti-abrasion finish, followed by a hydrophilic coating. This also doesn’t necessarily suggest the multi-coated lens will perform better than a single layered lens. Being “much better” depends upon the producer’s lens treatment techniques and the quality of products used in building the rifle glass.
Anti-water Lens Coating
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 makers will coat their lenses with a hydrophilic or hydrophobic finish. The Steiner Optics Nano-Protection is a good example of this type of treatment. It deals with the surface of the Steiner glass lens so the water particles can not bind to it or create surface tension. The result is that the water beads sheet off of the scope to keep a clear, water free sight picture.
Rifle Optic Installing Options
Installing options for scopes are available in a few options. There are the basic scope rings which are separately installed to the scope and one-piece mounts which cradle the scope. These various kinds of mounts also typically come in quick release variations which use toss levers which enable rifle shooters to rapidly mount and dismount the optics.
Hex Key Scope Ring Mounts
Basic, clamp type mounting optic rings use hex head screws to fix to the flattop design Picatinny scope mount rails on rifles. These forms of scope mounts use double separate rings to support the optic, and are usually constructed from 7075 T6 billet aluminum or similar materials which are developed for long distance precision shooting. This type of scope mount is ideal for rifles which are in need of a durable, hard use mount which will not shift despite just how much the scope is moved or jarring the rifle takes. These are the design of mounts you want for a specialized scope system on a long distance hunting or sniper competition rifle which will rarely need to be changed or recalibrated. Blue 242 Loctite threadlocker can additionally be used on the scope mount’s screws to protect against the hex screws from backing out after they are mounted safely in place. An example of these mounting rings are the 30mm style from Vortex Optics. The set generally costs around $200 USD
Quick-Release Cantilever Rifle Glass Ring Mounting Solutions
These types of quick-release rifle scope mounts can be used to rapidly remove a scope and attach it to a different rifle. Multiple scopes can also be switched out if they all use a compatible design mount. These types of mounts are handy for rifles which are carried a lot, to swap out the optic from the rifle for protecting the scope, or for optics which are used in between several rifles.
Sealing and Gas Purging for Rifle Optic Tubes
Moisture inside your rifle scope can mess up a day of shooting and your pricey optic by bringing about fogging and developing residue inside of the scope tube. Many scopes avoid wetness from entering the scope tube with a system of sealing O-rings which are water resistant.
Info Around Glass Tube Gas Purging
Another element of avoiding the buildup of wetness inside of the rifle optic tube is filling the tube with a gas like nitrogen. Given that this area is currently taken up by the gas, the scope is less altered by temp changes and pressure differences from the outdoor environment which may potentially allow water vapor to seep in around the seals to fill the void which would otherwise exist. These are good qualities of a decent rifle scope to seek out.