Last update on February 3, 2023 // Source: Amazon API
Rifle Scope Product Details
Sightmark Citadel 5-30×56 LR2 Riflescope
Keep the odds in your favor by shooting with the first focal plane Citadel 5-30×56 LR2 riflescope. For those who aren’t afraid to reach out and touch something from long-range, the Citadel 5-30×50 features exposed, pop-up locking turrets and red reticle illumination that make it a favorite of both competition shooters and serious hunters. A first focal plane reticle ensures shooters can range targets and use their holdovers across the 6x optical system found in this long-distance Citadel. Featuring fully multi-coated optics and a 30mm single-piece tube, the Citadel comes standard with flip-up lens covers, a sunshade and one CR2032 battery. Constructed of aircraft grade aluminum with a hard anodized finish, the durable Citadel 5-30×50 LR2 is IP67 waterproof, fogproof and shockproof.
Rifle Scope Product Features
First focal plane reticle
Red illuminated retiicle
Exposed, low-profile turrets
Single-piece 30mm tube
6:1 zoom ratio
Sightmark Citadel Riflescopes
First-and-second focal plane reticle options
Shockproof, fog-proof and waterproof
Sunshade included (LR1 & LR2) Series
Single-piece 30mm tube
6:1 zoom ratio
Fully multi-coated optics
Single piece 30mm Tube
Aircraft grade aluminum and hand-anodized finish with Subdued logos
Sightmark Citadel LR2 Riflescope
Situated on the high ground of close-to-long range optic performace, Citadel Riflescopes include affordable first-focal-plane, long-range capability and second-focal-plane tactical solutions. Citadel series optics are perfect for precision shooters, multi-gun competitors, hunters, and yes, most definitely, LEOs who demand and deserve peace of mind reliability.
Sightmark’s line of Citadel Riflescopes are designed to help professional, competitive and recreational shooters climb to the top of their game with impenetrable confidence and win the day with feature-rich, premium performing optics. All Sightmark Citadel riflescopes boast 30mm single-piece, aircraft-grade 6061-T6 aluminum tubes; premium, fully multi-coated glass; fine-etched, red-illuminated reticles; lens covers; throw levers; IP67 waterproof, dustproof, fogproof and shockproof reliability.
The Sightmark Citadel riflescope is equipped with a side focus dial that is used to eliminate parallax and finely focus the image. Parallax occurs when the image of the target does not focus at the same optical plane as the reticle inside the riflescope. When parallax is present, the reticle appears to move over the target when the shooter’s eye is not centered to the eyepiece. Adjusting the side focus dial properly will eliminate parallax.
Windage and Elevation Adjustments
The Sightmark Citadel riflescope has finger adjustable elevation and windage adjustments with audible clicks. The Citadel LR2 have locking, pop-up turrets. These turrets must be pulled up to disengage the locking mechanism. Once disengaged, adjustments can be made. When adjustments are finished, the turret can be pushed back down to lock the adjustment
The LR2 reticle is based on milliradian (mrad or mil) design. Milliradian is a measurement of angle. A single mil is equal to 3.6″ at 100 yards. The adjustments in the Citadel 3-18×50 and 5-30×56 riflescope is .1mrad, meaning that each click will move the point of impact .36″ at 100 yards or 1cm at 100 meters. The reticle is a first focal plane reticle. This style of reticle will grow along with the image as magnification is increased. The advantage of a first focal plane reticle is that the dimensions of the reticle will be true at any magnification. Therefore, rangefinding and performing holdovers can be done at any point in the magnification range.
The Sightmark Citadel riflescope eyepiece is designed to rotate to adjust for diopter. Diopter is the measurement of the eye’s curvature. By rotating the eyepiece, the diopter is adjusted to properly match each person’s vision. If the reticle does not appear clear, crisp, nor sharp, rotate the eyepiece until the reticle becomes clear and sharp. This adjustment should stay the same unless the riflescope’s operator changes.
Citadel 1-6×24 Citadel 3-18×50 LR1 Citadel 3-18×50 LR2 Citadel 5-30×56 Citadel 1-10×24
Reticle Type CR1 LR1 LR2 LR2 CR1
Magnification 1-6 3-18 3-18 5-30 1-10
Objective Lens diameter 24 50 50 56 24
Eye relief (in/mm) 3.5 – 2.9 / 88.9- 73.66 4.6 – 3.7 / 116.8 – 94 4.6 – 3.7 / 116.8 – 94 4.9 – 3.7 / 124.5 – 94 3.7 – 3.1 / 110.3 – 10.8
Tube Diameter 30 30 30 30 30
Adjustment Value (one click =) 1/2 MOA 1/4 MOA .1 MRAD .1 MRAD 1/2 MOA
About the Sightmark Manufacturer
Sightmark is a premium manufacturer for long gun scopes, optics, mounting solutions, and other components used for firearms like rifles and long guns. They innovate and supply their products by using materials which are long lasting and durable. This includes the Sightmark Citadel 5-30×56 LR2 Riflescope by Sightmark. For additional shooting items, visit their website.
All About Rifle Optics
Rifle scopes enable you to exactly align a rifle at different targets by lining up your eye with the target over a range. They accomplish this through magnifying the target by using a set of lenses within the scope. The scope’s alignment can be adjusted to take into account many environmental considerations like wind speed and elevation decreases to account for bullet drop.
The scope’s function is to help shooters understand exactly where the bullet will hit based upon the sight picture you are viewing using the scope as you align the scope’s crosshair or reticle with the target. The majority of modern-day rifle scopes and optics have about 11 parts which are found internally and on the exterior of the scope. These scope parts consist of the rifle scope’s body, lenses, windage turrets, focus rings, and other parts. Learn about the eleven parts of rifle scopes.
Rifle Glass Varieties
Rifle scopes can be either “first focal plane” or “second focal plane” type of scopes. Choosing the perfect type of rifle scope is based around what type of shooting you plan to do.
About First Focal Plane Glass
Focal plane scopes (FFP) feature the reticle in front of the zoom lens. These types of scopes are beneficial for:
- Quick acquisition, long distance kinds of shooting
- Shooting scenarios where computations are small
- Experienced shooters who recognize their aim point “hold over” and “lead” relationships for their long guns
- Shooters who do not mind the reticle is bigger and requires more visual eyesight room than a SFP reticle
Info on Second Focal Plane Glass
Second focal plane scopes (SFP) come with the reticle to the rear of the magnification lens. In the FFP example with the SFP scope, the 5x “zoom” 100 yard tick measurement would be 1/5th of the non “zoom” tick reticle measurement.
- Long distance styles of shooting where shooters have additional time to make ballistic computations
- Shooting where most of the shots happen within much shorter ranges and distances
- Shooters who select a clearer optic picture without space taken up by the bigger FFP reticle
Ins and Outs of Rifle Glass Magnification
The amount of scope magnification you need on your scope is based on the sort of shooting you desire to do. Nearly every kind of rifle glass supplies some level of magnification. The volume of zoom a scope offers is determined by the size, density, and curves of the lenses inside of the rifle optic. The magnifying level of the optic is the “power” of the scope. This denotes what the shooter is aiming at through the scope is amplified times the power factor of what can usually be seen by human eyes.
Fixed Power Lens Rifle Scopes
A single power rifle scope uses a magnification number designator like 4×32. This indicates the zoom power of the scope is 4x power and the objective lens is 32mm. The magnification of this kind of scope can not fluctuate since it is set from the factory.
Adjustable Power Lens Scopes
Variable power rifle scopes use variable power levels. The power change is handled by the power ring part of the scope near the rear of the scope by the eye bell.
The Power and Range of Scopes
Here are some advised scope powers and the ranges where they could be efficiently used. Always remember that high power optics will not be as effective as lower magnification level scope and optics because increased magnification can be a negative thing in certain situations. The exact same idea goes for extended ranges where the shooter needs to have enough power to see where to properly aim the rifle.
Details on Lens Finishes
All modern rifle scope and optic lenses are coated. Lens coating can be an essential element of a shooting platform when buying high end rifle optics and scope systems.
About Lens Coatings – HD Versus ED
Some glass manufacturers additionally use “HD” or high-def lense finishings that employ different procedures, rare earth compounds, components, and polarizations to extract numerous colors and viewable definition through the lens. This HD finish is normally used with higher density glass which reduces light’s opportunity to refract by means of the lens glass. Some scope vendors use “HD” to describe “ED” meaning extra-low dispersion glass. ED deals with how colors are presented on the chromatic spectrum and the chromatic aberration or difference which is similarly called color distortion or fringing. Chromatic aberration can be obvious over things with well defined outlines as light hits the object from certain angles.
Single Finish Versus Multi-Coating for Scopes
Different optic lenses can even have different finishes applied to them. All lenses usually have at least some kind of treatment or covering applied to them prior to being used in a rifle scope or optic. This is since the lens isn’t simply a raw piece of glass. It becomes part of the carefully tuned optic. It needs to have a finishing placed on it so that the lens will be optimally functional in numerous types of environments, degrees of sunlight (full VS shaded), and other shooting conditions.
Single covered lenses have a treatment applied to them which is usually a protective and improving multi-purpose treatment. This lens treatment can shield the lens from scratches while decreasing glare and other less helpful things experienced in the shooting environment while sighting in with the optic. The quality of a single coated lens depends upon the scope developer and just how much you paid for it. Both the manufacturer and amount are indications of the lens quality.
Some scope makers similarly make it a point to define if their optic lenses are layered or “multi” coated. Being “much better” depends on the manufacturer’s lens treatment innovation and the quality of materials used in constructing the rifle scope.
Hydrophobic Lens Coverings
Water on a lens does not assist with preserving a clear sight picture through a scope at all. Lots of top of the line and military grade optic makers will coat their lenses with a hydrophobic or hydrophilic finishing.
Scope Installing Alternatives
Mounting approaches for scopes can be found in a few options. There are the standard scope rings which are separately installed to the optic and one-piece scope mounts which cradle the scope. These different types of mounts also generally come in quick release variations which use throw levers which permit rifle shooters to quickly install and dismount the glass.
Hex Key Glass Ring Mounting Solutions
Standard, clamp-on design mounting optic rings use hex head screws to fix to the flattop style Picatinny scope mounting rails on rifles. These kinds of scope mounts use two individual rings to support the optic, and are normally constructed from 7075 T6 billet aluminum which are manufactured for long distance precision shooting. This kind of scope mount is exceptional for rifles which need a resilient, hard use mount which will not change despite how much the scope is moved about or jarring the rifle takes. These are the style of mounts you should have for a devoted optics system on a reach out and touch someone scouting or competitors rifle which will seldom need to be modified or recalibrated. Blue 242 Loctite threadlocker can also be used on screws to keep the hex screw threads from wiggling out after they are installed firmly in place. An example of these rings are the 30mm style from the Vortex Optics brand. The set normally costs around $200 USD
Quick-Release Cantilever Rifle Glass Ring Mounts
These types of quick-release rifle scope mounts can be used to quickly detach a scope and connect it to a different rifle. Several scopes can even be swapped out if they all use a compatible design mount. These types of mounts come in handy for rifle platforms which are carried a lot, to remove the optic from the rifle for protecting the scope, or for scopes which are used between numerous rifles or are situationally focused.
Optic Tube Sealing and Gas Purging
Wetness inside your rifle optic can ruin a day on the range and your expensive optic by resulting in fogging and producing residue within the scope tube. A lot of scopes prevent moisture from going into the optical tube with a series of sealing O-rings which are water resistant. Normally, these water-resistant scopes can be immersed under 20 or 30 feet of water before the water pressure can push moisture past the O-rings. This should be plenty of moisture prevention for standard use rifles for hunting and sporting purposes, unless you plan on taking your rifle boating and are concerned about the scope still working if it goes over the side and you can still salvage the gun.
Details on Rifle Scope Tube Gas Purging
Another part of preventing the buildup of moisture within the rifle scope’s tube is filling the tube with a gas like nitrogen. Given that this area is already occupied by the gas, the scope is less affected by temperature level alterations and pressure variations from the external environment which may potentially allow 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 seek out.