Description
Rifle Scope Product Details
Sightmark Triple Duty MDD Riflescope
Equipped with an illuminated red/green Mil-Dot Dot reticle, the Sightmark Triple Duty 4-16×44 MDD Riflescope aids in range estimation and shooting in low-light conditions. Its cutting-edge glass and fully multi-coated optics transmit a bright, crisp image that makes tracking and shooting targets almost effortless. The Triple Duty 4-16×44 MDD Riflescope features a one-piece 30mm tube that delivers exceptional light transmission and a wide field-of-view. O-ring sealed and nitrogen-purged, the precision scope is both fog proof and water resistant. The included oversized, locking windage and elevation turrets with 1/8-inch MOA clicks provide an additional level of accuracy and ensures that the scope stays zeroed. The Triple Duty series of riflescopes are complimentary to any shooter’s arsenal.
Rifle Scope Product Features
Adjustment lock with 1/4″ MOA locking turrets
Wide field of view
Precision multicoated optics
Internal lit red/green Mil-Dot Dot reticle
Lightweight, Waterproof, and Shockproof
Sightmark Triple Duty Riflescope
The Sightmark Triple Duty Series of riflescopes use cutting edge glass and lens coatings to ensure that it is the most accurate riflescope in its class. Precision multicoated optics are a distinguishing feature of the Sightmark Triple Duty riflescope line; multicoated lenses offer a clear view for easy target acquisition in both bright and low light situations. Both waterproof and fog proof, the nitrogen filled Sightmark Triple Duty Series features oversized windage, elevation and parallax adjustment knobs for easy adjustment in the field. Locking mechanisms on the windage and elevation adjustments ensure that the scope stays zeroed. Internal lit Mil-Dot reticles help shooters successfully make accurate shots over a wide range of distances and lighting conditions.
Precision accuracy
Mil-Dot reticle
Wide field of view
Precision multicoated optics
Phase corrected coating
Front diopter adjustment
Nitrogen purged
Lightweight, Waterproof, Shockproof, and Fog proof
Windage and Elevation Adjustment
Use a 1.5mm metric hex wrench to loosen the three set screws located along the scalloped edge of the elevation turret. Next, lock down the locking thumb screw on top of the knob. Then rotate the knob and set the MOA hash marks back to zero. Once the knob is zeroed, retighten the three set screws making sure not to over-torque and strip them. After all three set screws are sufficiently tightened, the mechanism will re-engage.
MD Reticle
The US Army Mil Dot reticle (MD and MDD) comes in two illumination versions. The MD reticle, initially Sightmark’s standard reticle, illuminates the entire Mil-Dot crosshair. This is intended to provide the shooter a keen aiming point for assistance in accurate shooting. In order to use the Mil-Dot reticle accurately, please read the following: Mil stands for millradian, 1/1623.2th of a circle or 3.438 MOA. The millradian represents 1 unit at 1000 yds. To simplify, a target that is one yard tall at 1000 yds would measure 1 millradian.
Parallax Adjustment
Sightmark’s higher magnification riflescopes do come equipped with a parallax adjustment knob. Parallax is the change of angular position of two stationary points relative to each other as seen by an observer. In other words, it’s how the image lines up in the riflescope and how the eye perceives it. Be sure to adjust the parallax knob to the correct shooting range. It is very important to keep this in mind when zeroing the rifle. If this is not taken into consideration at the time of sighting in the riflescope, accuracy will diminish.
Other Triple Duty Reticles
CD Reticle
The Circle Dot reticle (CD) features a circle dot with illumination capability. Provided only on the 1-6×24, the circle dot provides accurate shooting results at any magnification level. Perfect for tactical shooting, the circle dot rovides quick taget acquisition at 1x magnification and supreme accuracy at 6x magnification ideal for when conflicts advance to medium range shooting.
CDX Reticle
The Circle Dot Duplex reticle (CDX) features a circle dot with illumination capability with broad exterior subtensions. The central circle dot provides accurate shooting results at any magnification level; and with illumination capability it provides reticle contrast against backgrounds in low light conditions. The shortened exterior subtensions create an unobstructed view of the target allowing for quick target acquisition at any range.
DX Reticle
The Dot Duplex reticle (DX) features a fine central crosshair with a center illumination aiming point. This provides the shooter a keen aiming point for added accuracy while shooting. The broad exterior subtensions create contrast between the target allowing for quick reticle recognition. The Dot Duplex reticle creates an unobstructed view of the target, perfect for making precision shots while hunting.
MDD Reticle
The US Army Mil Dot reticle (MD and MDD) comes in two illumination versions.The MDD version illuminates the center point of the Mil-Dot cross hair only. This is intended to provide the shooter a keen aiming point for assistance in accurate shooting. In order to use the Mil-Dot reticle accurately, please read the following:
Mil stands for millradian, 1/1623.2th of a circle or 3.438 MOA. The millradian represents 1 unit at 1000 yds. To simplify, a target that is one yard tall at 1000 yds would measure 1 millradian.
Triple Duty 8.5-25×50 Riflescope Triple Duty M4 1-6×24 CDX Riflescope Triple Duty 2.5-10×32 MDD Riflescope Triple Duty 3-9×42 DX Riflescope
Reticle type MD, CDX, DX, MDD CD, CDX, DX MD, CDX, DX, MDD CDX, DX, MDD
Objective lens diameter 50 24 12 32
Field of view (m @ 100m) 4.89-1.66 33.47-5.53 13.99-4.64 14.69-3.67
Parallax 12- 100 100 100
Windage / Elevation 60 90 60 100
MOA 1/8″ 1/2″ 1/4″ 1/4″
Windage / Elevation lock yes yes no yes
About the Sightmark Manufacturer
Sightmark is a premium supplier for rifle scopes, optics, mounting solutions, and other accessories used for guns like rifles and long guns. They style and supply their scopes and related products by using elements which are long lasting and durable. This includes the Sightmark Triple Duty MDD Riflescope by Sightmark. For more shooting products, visit their site.
What You Need to Know About Rifle Glass
Rifle scopes permit you to precisely align a rifle at different targets by aligning your eye with the target over a range. They accomplish this through magnification by employing a series of lenses inside the scope. The scope’s positioning can be adjusted to account for various environmental aspects like wind speed and elevation increases 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 using the scope as you align the scope’s crosshair or reticle with the intended target. Many modern-day rifle optics have around 11 parts which are arranged inside and externally on the scope body. These parts consist of the rifle scope’s body, lenses, adjustment turrets or dials, focus rings, and other parts. See all eleven parts of a rifle optical system.
Rifle Glass Varieties
Rifle scopes can be either “first focal plane” or “second focal plane” kind of scopes. The form of focal plane an optic has establishes where the reticle or crosshair is located in regard to the scopes magnification. It actually means the reticle is situated behind or ahead of the magnifying lens of the optic. Deciding on the most beneficial kind of rifle glass depends on what form of hunting or shooting you plan on undertaking.
Info on First Focal Plane Scopes
Focal plane scopes (FFP) include the reticle in front of the magnification lens. These styles of scopes are helpful for:
- Quick acquisition, far away types of shooting
- Shooting circumstances where computations are minor
- Experienced shooters who know their aim point “hold over” as well as “lead” equations for their firearm
- Shooters who don’t mind the reticle is enlarged and occupies more visual sight room than a SFP reticle
Second Focal Plane Glass
Second focal plane optics (SFP) include the reticle to the rear of the magnification 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.
- Long distance styles of shooting where shooters have increased time to make ballistic calculations
- Shooting where most of the shots occur within much shorter ranges and spaces
- Shooters who prefer a clearer optic sight picture with less area used up by the larger size FFP reticle
About Optic Magnification
The quantity of zoom a scope supplies is determined by the diameter, density, and curvatures of the lenses inside of the rifle scope. The magnification of the scope is the “power” of the scope.
Single Power Lens Optics
A single power rifle optic comes with a magnification number designator like 4×32. This means the zoom power of the scope is 4x power and the objective lens is 32mm. The magnification of this type of optic can not adjust since it is a set power scope.
About Adjustable Power Lens Rifle Scopes
Variable power rifle scopes can be adjusted between magnification power levels. These types of scopes will list the zoom degree in a configuration like 2-10×32. These numbers mean the zoom of the scope could be changed in between 2x and 10x power. This also incorporates the powers in-between 2 and 10. The power adaptation is achieved by working with the power ring component of the scope near the back of the scope by the eye bell.
Optic Power Level and Range Correlation
Here are some advised scope powers and the ranges where they may be efficiently used. Keep in mind that higher magnification optics and scopes will not be as effective as lower powered glass since increased zoom can be a detractor. The same idea goes for extended distances where the shooter needs to have enough power to see precisely where to properly aim the rifle.
Lens Covering for Rifle Optics
All contemporary rifle optic and scope lenses are covered in special coatings. There are various types and qualities of finishes. Lens covering is a crucial aspect of a rifle when looking into high end rifle optics and targeting equipment. The lenses are among the most essential components of the optic considering that they are what your eye sees through while sighting a rifle in on the point of impact. The finishing on the lenses safeguards the lens surface area and also improves anti glare from refracted natural light and color profiles.
HD Versus ED Lens Coatings
Some scope brands also use “HD” or high-definition lens coverings which use various techniques, polarizations, chemicals, and aspects to draw out various colors and viewable definition through the lens. Some scope makers use “HD” to refer to “ED” to signify the lens has extra-low dispersion glass.
Single Rifle Glass Lens Finish Versus Multi-Coating
Different optic lenses can also have different finishings used to them. All lenses generally have at least some type of treatment or covering used to them before they are used in a rifle scope or optic.
Single covered lenses have a treatment applied to them which is usually a protective and boosting multi-purpose treatment. This lens treatment can shield the lens from scratches while lowering glare and other less advantageous things experienced in the shooting environment while sighting in with the optic. The quality of a single coated lens depends upon the scope maker and how much you spent paying for it. Both are signs of the lens quality.
Some scope makers similarly make it a point to define if their optic lenses are layered or “multi” covered. Being “much better” depends on the producer’s lens treatment innovation and the quality of products used in building the rifle scope.
Anti-water Lens Finishes
Water on a lens does not help with preserving a clear sight picture through a scope at all. Numerous top of the line and high-end scope makers will coat their lenses with a hydrophobic or hydrophilic finish.
Scope Installation Choices
Mounting approaches for scopes come in a few choices. 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 normally come in quick release versions which use manual levers which allow rifle shooters to rapidly mount and dismount the scope.
Glass Mounts with Hex Key Rings
Basic, clamp-on style mounting optic rings use hex head screws to fix to the flattop design Picatinny scope mounting rails on rifles. These styles of scope mounts use double detached rings to support the scope, and are made from 7075 T6 billet aluminum which are designed for long distance accuracy shooting. This type of scope mount is effective for rifle systems which need to have a long lasting, rock solid mount which will not move regardless of just how much the scope is moved or abuse the rifle takes. These are the design of mounts you really want to have for a dedicated optics setup on a far away hunting or competition firearm which will hardly ever need to be changed or recalibrated. Blue 242 Loctite threadlocker can also be used on the scope mount’s screws to keep the hex screws from backing out after they are installed safely in position. An example of these rings are the 30mm type made by the Vortex Optics company. The set usually costs around $200 USD
Quick-Release Cantilever Glass Rings
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 also be swapped out if they all use a compatible style mount. These types of mounts are convenient for rifles which are transferred a lot, to remove the optic from the rifle for protecting the scope, or for scopes which are used between several rifles or are situationally focused.
Optic Tube Sealing and Gas Purging
Moisture inside your rifle scope can ruin a day of shooting and your costly optic by inducing fogging and creating residue inside of the scope’s tube. A lot of scopes prevent moisture from getting in the scope tube with a system of sealing O-rings which are water resistant. Usually, these water resistant optics can be submerged underneath 20 or 30 feet of water before the water pressure can force moisture past the O-rings. This should be ample moisture prevention for basic use rifles, unless you plan on taking your rifle on boats and are concerned about the optic still performing if it is submerged in water and you can still find the rifle.
Optic Gas Purging
Another part of avoiding the buildup of wetness inside of the rifle optic tube is filling the tube with a gas like nitrogen. Because this area is already taken up by the gas, the scope is less affected by climate alterations and pressure variations from the outdoor environment which could potentially enable water vapor to permeate in around the seals to fill the vacuum which would otherwise exist. These are good qualities of a good rifle scope to seek out.
