Description
Last update on May 17, 2022 // Source: Amazon API
Rifle Scope Product Details
Sightmark Citadel 1-6×24 CR1 Riflescope
Offering a wide magnification range for close to mid-range shooting, the Citadel 1-6×24 combines impressive performance with a stealthy appearance. Designed with real shooters in mind, the Citadel 1-6x features a second focal plane BDC reticle calibrated for 55gr 5.56/.223, red reticle illumination for contrast against targets and low light shooting and fully multi-coated optics. Capped, low profile turrets protect zero and add to the Citadel’s no-nonsense, subdued appearance. A single-piece, 30mm tube and aircraft grade aluminum construction make the Citadel extremely durable and IP67 waterproof. Ideal for a variety of firearms, the Citadel 1-6×24 CR1 includes flip up lens caps, a handy throw lever and one CR2032 battery.
Rifle Scope Product Features
Included Components: Flip up lens covers,Throw lever attachment,CR2032 Battery
Sport Type: Climbing
Fully multi-coated optics
Second focal plane reticle
6: 1 zoom ratio
Sightmark Citadel Riflescopes
Features
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 1-6×24 CR1 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.
Parallax Correction
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 1-6×24 has capped turrets, the turret covers must be unscrewed in order to make adjustments.
CR1 Reticle
The CR1 reticle is a second focal plane, minute of angle (MOA) reticle. This reticle is calibrated for 5.56×45 / .223 Rem. 55gr FMJ ammo. The reticle was designed for a 100 yard zero. At 6x magnification, the 1 MOA aiming dot is used to engage targets from 0 to 200 yards. The reticle consists of a circle dot design for quick target acquisition in close range engagements. At 1x magnification, the outer circle will cover approximately 15 inches of a target at 25 yards. This is nearly equivalent to shoulder width of IPSC targets. Below the aiming dot, holdovers can be used to determine range of IPSC targets and perform ballistic holdovers out to 600 yards. Finally, the main horizontal subtension is scaled in 5 MOA increments (at 6x) and can be used for leads for moving targets.
Diopter Adjustment
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 Scope Maker
Sightmark is a premium maker for weapon scopes, optics, mounts, and other components used for firearms like rifles and long guns. They create and supply their mounts and related products by using elements which are long lasting and resilient. This includes the Sightmark Citadel 1-6×24 CR1 Riflescope by Sightmark. For additional shooting items, visit their website.
Glass Info
Rifle scopes allow you to specifically aim a rifle at different targets by aligning your eye with the target at range. They do this through magnifying the target by employing a series of lenses within the scope. The scope’s positioning can be dialed in to account for different ecological factors like wind speed and elevation increases to make up for bullet drop.
The scope’s purpose is to help shooters understand exactly where the bullet will hit based upon the sight picture you are seeing via the scope as you align the scope’s crosshair or reticle with the intended target. Many modern rifle scopes have around 11 parts which are arranged inside and outside of the scope. These parts consist of the rifle scope’s body, lenses, windage dials or turrets, focus rings, and other elements. Learn about the eleven parts of rifle optics.
Rifle Glass Styles
Rifle scopes can be either “first focal plane” or “second focal plane” type of scopes. Picking the finest type of rifle scope is based on 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. This triggers the reticle to increase in size based on the amount of magnification being used. The result is that the reticle measurements are the same at the enhanced distance as they are at the non amplified distance. One tick on a mil-dot reticle at one hundred yards with no “zoom” is still the exact same tick at one hundred yards with 5x “zoom”. These types of scopes work for:
- Quick acquisition, far away types of shooting
- Shooting situations where computations are minimal
- Experienced shooters who know their aim point “hold over” plus “lead” relationships for their weapon
- Shooters who don’t mind the reticle is enlarged and takes up more visual sight space than a SFP reticle
About 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 would be 1/5th of the non “zoom” tick.
- Far away forms of shooting where shooters have extra time to make ballistic calculations
- Shooting where most shots occur within much shorter distances and ranges
- Shooters who choose a clearer optic sight picture with less area used up by the larger sized FFP reticle
Details on Rifle Optic Magnification
The amount of scope zoom you need depends upon the style of shooting you wish to do. Virtually every style of rifle optic provides some amount of magnification. The volume of magnification a scope delivers is identified by the dimension, density, and curves of the lens glass within the rifle scope. The zoom of the optic is the “power” of the scope. This indicates what the shooter is observing through the scope is amplified times the power aspect of what can typically be seen by human eyes.
Fixed Power Lens Optics
A single power rifle optic will have a zoom number designator like 4×32. This means the magnification power of the scope is 4x power while the objective lens is 32mm. The magnification of this type of scope can not fluctuate since it is fixed.
Adjustable Power Lens Scope Details
Variable power rifle scopes use variable power levels. The power adjustment is accomplished by the power ring part of the scope near the rear of the scope by the eye bell.
The Power and Range of Rifle Glass
Here are some advised scope power settings and the distances where they could be effectively used. Remember that high magnification optics and scopes will not be as practical as lower magnification level scope and optics because increased magnification can be a detractor. The exact same concept goes for extended distances where the shooter needs increased power to see exactly where to properly aim the rifle at the target.
Info on Lens Coating
All modern-day rifle optic lenses are coated. There are various types and qualities of glass finishes. When shopping for luxury rifle optics and scope systems, Lens finish can be a significant element of a rifle. The lenses are one of the most essential parts of the scope given that 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 as well as improves anti glare from refracted daylight and color visibility.
HD Versus ED Lenses
Some scope producers likewise use “HD” or high-definition lens coatings which use various methods, polarizations, aspects, and chemicals to draw out separate colors and viewable definition through the lens. Some scope makers use “HD” to refer to “ED” implying extra-low dispersion glass.
Single Rifle Optic Lens Coating Versus Multi-Coating
Various scope lenses can even have different coatings applied to them. All lenses normally have at least some type of treatment or covering applied to them before they are used in a rifle scope or optic assembly. Because the lens isn’t simply a raw piece of glass, they require performance enhancing coatings. It is part of the finely tuned optic. It requires a coating to be applied to it so that it will be optimally usable in numerous kinds of environments, degrees of light (full VS shaded), and other shooting conditions.
This lens treatment can safeguard the lens from scratches while minimizing glare and other less helpful things experienced in the shooting environment while sighting in with the scope. The quality of a single covered lens depends on the scope manufacturer and how much you paid for it.
Some scope producers also make it a point to define if their optic lenses are covered or “multi” covered. This indicates the lens has had several treatments applied to the surfaces. If a lens gets numerous treatments, it can indicate that a producer is taking numerous actions to fight various environmental aspects like an anti-glare finish, a scratch resistant anti-abrasion covering, followed by a hydrophilic coating. This also doesn’t always suggest the multi-coated lens will perform much better than a single coated lens. Being “much better” hinges on the maker’s lens treatment solutions and the quality of materials used in creating the rifle optic.
Glass Lens Anti-water Finishing
Water on a scope lens does not improve keeping a clear sight picture through an optic whatsoever. Numerous top of the line or premium optic producers will coat their lenses with a hydrophilic or hydrophobic covering. The Steiner Optics Nano-Protection is a good example of this type of treatment. It treats the surface of the Steiner optic lens so the H2O molecules can not bind to it or produce surface tension. The outcome is that the water beads sheet off of the scope to maintain a clear, water free sight picture.
Scope Installation Choices
Mounting options for scopes are available in a couple of options. There are the standard scope rings which are individually installed to the optic and one-piece mounts which cradle the scope. These different kinds of mounts also generally come in quick release variations which use throw levers which permit rifle operators to rapidly install and remove the scopes.
Rifle Scope Mounts with Hex Key Rings
Standard, clamp style mounting optic rings use hex head screws to install to the flattop design Picatinny scope mounting rails on rifles. These varieties of scope mounts use two separate rings to support the scope, and are usually constructed from 7075 T6 billet aluminum which are designed for far away precision shooting. This form of scope mount is effective for rifle systems which are in need of a long lasting, unfailing mount which will not move no matter just how much the scope is moved about or jarring the rifle takes. These are the type of mounts you really want to have for a dedicated scope setup on a reach out and touch someone hunting or hard target interdiction rifle that will almost never need to be altered or adjusted. Blue 242 Loctite threadlocker can additionally be used on the scope mount screws to protect against the hex screw threads from wiggling out after they are installed securely in position. An example of these rings are the 30mm type made by the Vortex Optics brand. The set usually costs around $200 USD
Quick-Release Cantilever Scope Ring Mounting Solutions
These types of quick-release rifle scope mounts can be used to quickly detach a scope and connect it to a different rifle. Numerous scopes can also be switched out if they all use a compatible design mount. These types of mounts are handy for long guns which are carried a lot, to swap out the optic from the rifle for protection, or for scopes which are used between several rifles or are situationally focused.
About Rifle Optic Tube Sealing and Gas Purging
Wetness inside your rifle optic can mess up a day of shooting and your pricey optic by causing fogging and developing residue within the scope tube. Most scopes protect against moisture from getting in the scope tube with a system of sealing O-rings which are waterproof. Typically, these water resistant optics can be submerged beneath 20 or 30 feet of water before the water pressure can push moisture past the O-rings. This should be more than enough moisture prevention for basic use rifles, unless you plan on taking your rifle on a boat and are worried about the scope still functioning if it is submerged in water and you can still rescue the firearm.
What to Know About Rifle Glass Tube Gas Purging
Another element of avoiding the buildup of moisture within the rifle optic’s tube is filling the tube with a gas like nitrogen. Considering that this space is already occupied by the gas, the optic is less influenced by condition alterations and pressure differences from the outside environment which may potentially enable water vapor to permeate in around the seals to fill the vacuum which would otherwise be there. These are good qualities of a decent rifle scope to seek out.
