Description
Last update on February 8, 2023 // Source: Amazon API
Rifle Scope Product Details
Sightmark Triple Duty 8.5-25×50 DX Riflescope
The Sightmark 8.5-25×50 Triple Duty riflescope uses cutting edge glass and lens coatings to ensure that it is the most accurate tactical instrument on the market. Precision multicoated optics are the distinguishing feature of the Sightmark Triple Duty riflescope line; multicoated lenses offer the clearest view for easy target acquisition in both bright and low light situations. Both waterproof and fog proof, the nitrogen filled Sightmark Triple Duty line features oversized windage, elevation and focusing adjustment knobs for easy adjustment in the field. Locking mechanisms on the windage and elevation adjustments provide an additional level of accuracy and ensure that the scope stays zeroed. The 8.5-25×50’s internal lit duplex reticle helps shooters to successfully make highly accurate shots over a wide range of distances.
Rifle Scope Product Features
Precision accuracy
Adjustment lock
Mil-Dot Dot Reticle
Wide field of view
1/8-Inch locking MOA
Developing Products That Work As Hard As You Do
Long hours, harsh weather, dangerous pursuits: it’s all in a day’s work. You’re devoted to protecting others so your equipment needs to work as hard as you do. Whether you’re in the line of duty, defending your home or serving as a protector of peace- you can rest assured that accuracy and quality come standard in every Sightmark product.
Our goal is to provide state-of-the-art optics and accessories to make the modern shotgun, rifle & pistol as accurate as possible. In addition, each product is designed for the core market, enabling shooters to purchase more high quality items to accessorize their firearm for various needs.
Sightmark has earned several patents and awards from industry associations and publications including Field & Stream, Optics Planet, Outdoor Life and Predator Xtreme. Numerous optics and accessories have been field tested and approved by prominent outdoor organizations such as the North American Hunting Club and the National Tactical Officers Association.
Best Sellers
Riflescopes: When you pick up a Sightmark Riflescope, what you will find is a product that has been crafted to match your pursuit. From tactical setups to a hunting scope fitted on your favorite rifle, each optic is designed for a range and reticle style to best match the conditions you’ll find in the field. Embracing this concept, Sightmark is able to provide a riflescope for every shooter.
Riflescopes
Red Dot Sights/Reflex Sights
Boresights
Digital Night Vision Riflescopes
Tactical
Mil-Spec Driven
Hunting
Field Qualified
Competition
Range Tested
Whether you’re a 3-gun competition shooter, or a dedicated hunter, laying a foundation at the shooting bench is essential, no matter the pursuit. Devoting serious time at the range provides the repetition needed to build confidence in your abilities as a marksman.
At Sightmark, our goal is to deliver confidence by creating optics and accessories that every shooter can rely on. We understand what it takes to prepare and we know that the hours spent hunched over a shooting bench at the range are meaningless unless your products do their job. From riflescopes and binoculars to night vision technology and red dots, Sightmark is committed in our pursuit of building durable, accurate optics you can trust.
About the Sightmark Company
Sightmark is a premium manufacturer for rifle scopes, optics, mounting solutions, and other add-ons used for firearms like rifles and long guns. They innovate and supply their mounts and related products choosing elements which are long lasting and resilient. This includes the Sightmark Triple Duty 8.5-25×50 DX Riflescope by Sightmark. For additional shooting items, visit their site.
Information Rifle Glass
Rifle scopes enable you to precisely align a rifle at various targets by lining up your eye with the target at range. They do this through zoom by employing a series of lenses inside the scope. The scope’s alignment can be adjusted for the consideration of varied natural elements like wind speed and elevation to account for bullet drop.
The scope’s function is to help shooters understand exactly where the bullet will land based on the sight picture you are seeing through the scope as you line up the scope’s crosshair or reticle with the intended point of impact. A lot of modern-day rifle optics have around 11 parts which are found internally and outside of the scope. These scope parts consist of the rifle scope’s body, lenses, adjustment dials or turrets, focus rings, and other components. Learn about the eleven parts of optics.
About Scope Styles
Rifle scopes can be either “first focal plane” or “second focal plane” kind of scopes. The style of focal plane a scope has decides where the reticle or crosshair lies in regard to the scopes magnification. It actually implies the reticle is behind or before the magnification lens of the scope. Deciding upon the most suitable type of rifle glass depends on what form of hunting or shooting you plan on doing.
First Focal Plane Scopes
Focal plane scopes (FFP) include the reticle in front of the zoom lens. These styles of scopes are useful for:
- Quick acquisition, long distance kinds of shooting
- Shooting scenarios where computations are small
- Experienced shooters who recognize their target “hold over” and also “lead” correlations for their rifles
- Shooters who do not mind the reticle is enlarged and requires more visual eyesight room than a SFP reticle
Info About Second Focal Plane Optics
Second focal plane optics (SFP) feature the reticle behind the zoom lens. This triggers the reticle to remain at the exact same overall size in connection with the volume of magnification being used. The result is that the reticle measurements change based on the zoom applied to shoot over lengthier distances considering that the reticle markings represent various increments which vary with the magnification level. 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. These varieties of glass are convenient for:
- Long distance types of shooting where shooters have more time to make ballistic calculations
- Shooting where most shots occur within shorter proximities and ranges
- Shooters who prefer a clearer optic picture with less space used up by the enlarged FFP reticle
Scope Zoom
The quantity of zoom a scope supplies is figured out by the diameter, thickness, and curvatures of the lenses inside of the rifle scope. The magnification of the scope is the “power” of the scope.
Fixed Single Power Lens Rifle Glass
A single power rifle optic or scope uses 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 zoom of this kind of optic can not change considering that it is a fixed power scope.
Variable Power Lens Rifle Glass Facts
Variable power rifle scopes can be tweaked between magnified settings. The power change is achieved by using the power ring part of the scope near the back of the scope by the eye bell.
The Power and Range of Rifle Scopes
Here are some suggested scope power settings and the distances where they could be efficiently used. Bear in mind that higher magnification glass will not be as effective as lower powered glass since too much magnification can be a detractor. The exact same idea relates to extended ranges where the shooter needs to have sufficient power to see where to properly aim the rifle at the target.
Lens Finishing for Rifle Optics
All contemporary rifle glass lenses are covered. Lens finish can be an essential element of a shooting platform when considering high end rifle optics and scope equipment.
HD Versus ED Lenses
Some scope makers also use “HD” or high-definition lens finishings which use various methods, polarizations, components, and chemicals to draw out various colors and viewable definition through the lens. Some scope manufacturers use “HD” to refer to “ED” to signify the lens has extra-low dispersion glass.
Info on Single Finishing Versus Multi-Coating
Different optic lenses can also have different coverings used to them. All lenses typically have at least some type of treatment or covering applied to them before being 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 safeguard the lens from scratches while reducing glare and other less advantageous things experienced in the shooting environment while sighting in with the scope. The quality of a single coated lens depends upon the scope designer and how much you spent paying for it. The scope’s maker and cost are indicators of the lens quality.
Some scope makers likewise make it a point to specify if their optic lenses are coated or “multi” coated. This indicates the lens has had several treatments applied to the surfaces. If a lens receives numerous treatments, it can prove that a producer is taking several steps to combat various environmental elements like an anti-glare covering, a scratch resistant anti-abrasion finish, followed by a hydrophilic coating. This also doesn’t always mean the multi-coated lens will perform much better than a single layered lens. Being “better” depends on the manufacturer’s lens treatment innovation and the quality of products used in creating the rifle scope.
Hydrophobic Lens Coating
Water on a lens doesn’t assist with preserving a clear sight picture through a scope at all. Lots of top of the line and high-end scope makers will coat their lenses with a hydrophilic or hydrophobic coating.
Optic Mounting Alternatives
Mounting approaches for scopes can be found in a couple of choices. There are the standard scope rings which are separately mounted to the optic and one-piece scope mounts which cradle the scope. These different kinds of mounts also normally come in quick release versions which use manual levers which allow rifle operators to rapidly mount and remove the optics.
Hex Key Scope Rings
Basic, clamp-on type mounting scope rings use hex head screws to position to the flattop style Picatinny scope mounting rails on the tops of rifles. These varieties of scope mounts use a pair of separate rings to support the optic, and are normally made from 7075 T6 billet aluminum or similar materials which are manufactured for long distance accuracy shooting. This form of scope mount is very good for rifles which are in need of a long lasting, hard use mount which will not move despite how much the scope is moved or jarring the rifle takes. These are the type of mounts you want for a faithful scope system on a far away hunting or competition long gun which will rarely need to be changed or adjusted. Blue 242 Loctite threadlocker can additionally be used on the scope mount screws to prevent the hex screw threads from wiggling out after they are installed safely in place. An example of these rings are the 30mm type made by the Vortex Optics brand. The set usually costs around $200 USD
Glass Mounting Solutions with Quick-Release Cantilever Rings
These types of quick-release rifle scope mounts can be used to rapidly remove a scope and connect it to a different rifle. Numerous scopes can even be switched out if they all use a compatible design mount. These types of mounts are handy for long guns which are transferred a lot, to swap out the optic from the rifle for protecting the scope, or for optics which are used in between several rifles or are situationally focused.
Rifle Scope Tube Sealing and Gas Purging
Moisture inside your rifle glass can ruin a day of shooting and your pricey optic by resulting in fogging and generating residue inside of the scope tube. Many optics protect against wetness from going into the scope tube with a series of sealing O-rings which are waterproof. Generally, these optics can be submerged under 20 or 30 feet of water before the water pressure can force moisture past the O-rings. This should be ample wetness prevention for standard use rifles, unless you intend on taking your rifle on boats and are worried about the scope still working if it is submerged in water and you can still salvage the rifle.
Glass Gas Purging
Another component of avoiding the accumulation of moisture within the rifle optic’s tube is filling the tube with a gas like nitrogen. Since this space is already taken up by the gas, the optic is less influenced by temperature alterations and pressure variations from the outside environment which could potentially enable water vapor to leak 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.
