Last update on February 2, 2023 // Source: Amazon API
Rifle Scope Product Details
Sightmark Citadel 3-18×50 LR1 Riflescope
The new premium Citadel 3-18×50 LR1 riflescope is designed for medium-to-long range shooting, competition shooting, LE and hunting. The Citadel features a 6x optical system, a fully multi-coated lens, exposed locking turrets and a red illuminated reticle with 11-brightness settings. The first focal plane reticle means the size of the reticle remains the same in any magnification and holdovers and range finding can be performed. The new reticle, LR1, is a 1/4 MOA reticle allowing each click adjustment to move the point of impact of an inch at 100 yards. The riflescope is crafted out of a single shockproof aircraft grade aluminum 30mm tube and is IP67 waterproof and dustproof. The optic comes complete with flip-up covers, a throw lever to adjust the magnification with ease and a sunshade.
Rifle Scope Product Features
LR1 reticle at click adjustments at 100 yards – Red illuminated reticle with 11 brightness settings
6x optical system for medium-to-long range shooting
First focal plane reticle ” reticle remains the same as you zoom in on a target
Multi-coated lens system ” one or more lens surfaces are coated with an anti-reflective coating
Exposed turrets ” pop-up exposed turrets that pull up to adjust and push down to lock in place
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 3-18×50 LR1 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 LR1 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 LR1 riflescope uses a Minute Of Angle (MOA) reticle and adjustments. The reticles are first focal plane, thus will grow in size as magnification is increased and vice versa. The advantage is the dimensions of the reticle will be true at any magnifications. The reticles can be used to determine target range and perform shot holdovers for wind/drop compensation accurately at any magnification. The vertical and horizontal MOA scales are scaled in 2 MOA increments. The top, left, and right end of the vertical and horizontal scale are scaled in .5 MOA increments. The reticle’s drop lines contain a series of reference dots for quick windage holdovers in 1 MOA increments. Finally, the aiming crosshair is .12 MOA.
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 Company
Sightmark is a premium maker for firearm scopes, optics, mounts, and other components used for guns like rifles and long guns. They design and build their mounts, scopes, and related products by using building materials which are durable and long lasting. This includes the Sightmark Citadel 3-18×50 LR1 Riflescope by Sightmark. For additional shooting items, visit their site.
About Rifle Scopes
Rifle scopes permit you to specifically aim a rifle at different targets by aligning your eye with the target at range. They accomplish this through zoom by making use of a set of lenses within the scope. The scope’s positioning can be adapted to take into account many environmental elements like wind speed and elevation decreases to make up for bullet drop.
The scope’s function is to help the shooter understand exactly where the bullet will hit based upon the sight picture you are viewing with the scope as you line up the scope’s crosshair or reticle with the intended target. Most modern rifle scopes and optics have about eleven parts which are arranged within and externally on the scope. These scope parts consist of the rifle scope’s body, lenses, modification turrets or dials, focus rings, and other components. See all eleven parts of a rifle optical system.
The Varieties of Rifle Scopes
Rifle scopes can be either “first focal plane” or “second focal plane” style of scopes. The style of focal plane an optic has identifies where the reticle or crosshair lies in relation to the optic’s zoom. It actually means the reticle is located behind or in front of the magnifying lens of the optic. Deciding on the most beneficial kind of rifle glass is based on what type of shooting you intend on doing.
Info About First Focal Plane Scopes
First focal plane optics (FFP) feature the reticle in front of the magnification lens. This triggers the reticle to increase in size based upon the extent of zoom being used. The outcome is that the reticle measurements are the same at the magnified range as they are at the non magnified distance. One tick on a mil-dot reticle at 100 yards with no “zoom” is still the exact same tick at 100 yards by using 5x “zoom”. These kinds of scopes work for:
- Quick acquisition, long distance types of shooting
- Shooting circumstances where estimations are minor
- Experienced shooters who have an idea for their target “hold over” plus “lead” relationships for their long guns
- Shooters who don’t mind the reticle is bigger and takes up more visual eyesight area than a SFP reticle
Second Focal Plane Glass Info
Second focal plane glass (SFP) include the reticle to the rear of the magnifying lens. This triggers the reticle to remain at the exact same overall size in connection with the amount of magnification being used. The end result is that the reticle measurements change based upon the zoom chosen to shoot over greater distances given that the reticle markings represent distinct increments which fluctuate with the magnification level. In the FFP example with the SFP glass, the 5x “zoom” 100 yard tick would be 1/5th of the non “zoom” tick measurement. These particular types of glass are beneficial for:
- Far away types of shooting where shooters have increased time to make ballistic calculations
- Shooting where most shots happen within much shorter distances and ranges
- Shooters who desire a clearer optic picture without area used up by the enlarged FFP reticle
About Scope Zoom
The quantity of magnification a scope provides is figured out by the diameter, density, and curvatures of the lenses inside of the rifle scope. The zoom of the scope is the “power” of the scope.
Single Power Lens Rifle Optic Details
A single power rifle scope uses a zoom 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 fluctuate because it is a fixed power optic.
Adjustable Power Lens Glass Details
Variable power rifle scopes use enhanced power. The power modification is accomplished by the power ring part of the scope near the back of the scope by the eye bell.
The Power and Range of Glass
Here are some advised scope powers and the ranges where they may be successfully used. Highly magnified scopes will not be as beneficial as lower powered optics due to the fact that too much magnification can be a negative aspect depending on your shooting distance. The very same idea goes for longer distances where the shooter needs to have sufficient power to see exactly where to properly aim the rifle.
Rifle Optic Lens Finish
All contemporary rifle optic and scope lenses are covered. Lens coating can be an essential element of a rifle when buying high end rifle optics and scope setups.
Details on Optic Lens Coatings – HD Versus ED
Some scope manufacturers additionally use “HD” or high-definition glass coverings that make the most of various procedures, chemicals, polarizations, and aspects to extract separate color ranges and viewable definition through lenses. This high-definition covering is normally used with higher density glass which drops light’s ability to refract through the lens glass. Some scope brands use “HD” to refer to “ED” implying extra-low dispersion glass. ED deals with how certain colors are represented on the chromatic spectrum and the chromatic difference or aberration which is similarly called color distortion or fringing. Chromatic aberration can be noticeable over things with hard outlines as light hits the item from specific angles.
Details on Single Finish Versus Multi-Coating
Various optic lenses can also have different finishings used to them. All lenses usually have at least some type of treatment or finishing used to them prior to being used in a rifle scope or optic.
This lens treatment can protect the lens from scratches while minimizing glare and other less beneficial 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 manufacturers also make it a point to define if their optic lenses are coated or “multi” coated. Being “better” depends on the producer’s lens treatment technology and the quality of materials used in developing the rifle scope.
Anti-water Covering for Optics
Water on a lens doesn’t assist with preserving a clear sight picture through a scope at all. Numerous top of the line and high-end optic companies will coat their lenses with a hydrophilic or hydrophobic finish.
Rifle Glass Installation Choices
Mounting approaches 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 different kinds of mounts also usually are made in quick release variations which use manual levers which permit rifle shooters to quickly mount and remove the optics.
Hex Key Rifle Scope Ring Mounts
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 separate rings to support the optic, and are often made from 7075 T6 billet aluminum which are created for long range precision shooting. This type of scope install is wonderful for rifles which require a long lasting, sound mounting solution which will not move no matter how much the scope is moved or abused.
Quick-Release Cantilever 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 also be swapped out if they all use a similar style mount. These types of mounts are handy for rifles which are carried a lot, to remove the optic from the rifle for protecting the scope, or for optics which are used between numerous rifles.
Sealing and Gas Purging for Optic Tubes
Wetness 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. Most scopes prevent wetness from getting in the scope tube with a system of sealing O-rings which are water resistant.
Gas Purged Optic Tubes
Another component of avoiding the buildup of wetness inside of the rifle optic’s tube is filling the tube with a gas like nitrogen. Since this area is already taken up by the gas, the glass is less affected by climate alterations and pressure differences from the outdoor environment which might potentially enable water vapor to permeate in around the seals to fill the void which would otherwise be there. These are good qualities of a decent rifle scope to seek out.