Description
Rifle Scope Product Details
Sweet 17 Riflescope, 3-12x40mm, Duplex, Matte, 1″ Tube, 10 yds to Infinity & Adjustable
Sweet 17 Rifle Scopes are designed for the serious hunter. The main features of the Sweet 17 are their ability to compensate for bullet trajectory by specific grain weight. The elevation drum will compensate for both .17/17HMR and .20gr. Features:- Calibrated for the .17 HMR.- Adjustable Parallax.- Turret calibrated for .17/17hmr and .20gr. – Limited Lifetime :- Magnification: 3-12 – Obj. Lens Diameter (mm): 40 – Exit Pupil Range (mm): – Field of View 100 Yds: – Optimum Eye Relief (in): 4 – Parallax Setting: 10 to Inf. – Click Adjustment Value: 1/4 – Adjustment Range: 45-45 – Transmission(%): Day/Night – Weight (ounces): no: S17-312x40bar code: 631618112344manufacturer : BSAshipping dimensions: weight: 2.1 dimensional weight: 5 (w) (h) (d)
Rifle Scope Product Features
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About the BSA Optics Scope Maker
BSA Optics is a premium manufacturer for long gun scopes, optics, mounting solutions, and other components used for firearms like rifles and long guns. They style and manufacture their mounts and related products choosing materials which are long lasting and resilient. This includes the Sweet 17 Riflescope, 3-12x40mm, Duplex, Matte, 1″ Tube, 10 yds to Infinity & Adjustable by BSA Optics. For more shooting goods, visit their website.
Rifle Scope Details
Rifle scopes permit you to specifically aim a rifle at different targets by lining up your eye with the target at range. They accomplish this through magnification by using a series of lenses within the scope. The scope’s positioning can be adjusted to take into account separate natural factors like wind and elevation increases or decreases to make up for bullet drop.
The scope’s function is to 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. Most modern-day rifle scopes have about 11 parts which are arranged within and externally on the scope body. These optic pieces include the rifle scope’s body, lenses, elevation turrets or dials, focus rings, and other parts. Learn about the eleven parts of rifle scopes.
The Varieties of Rifle Scopes
Rifle scopes can be either “first focal plane” or “second focal plane” type of optics. Deciding on the perfect type of rifle optic is based around what type of shooting you plan on doing.
First Focal Plane Optics
Focal plane scopes (FFP) include the reticle in front of the zoom lens. These types of scopes are beneficial for:
- Quick acquisition, far away types of shooting
- Shooting scenarios where calculations are minor
- Experienced shooters who have an idea for their target “hold over” as well as “lead” ratios for their long gun
- Shooters who don’t mind the reticle is enlarged and takes up more visual eyesight space than a SFP reticle
Info About Second Focal Plane Optics
Second focal plane optics (SFP) feature the reticle to the rear of the magnifying lens. This causes the reticle to remain at the very same size in relation to the level of magnification being used. The result is that the reticle dimensions alter based upon the zoom employed to shoot over longer distances considering that the reticle markings present various increments which can vary with the magnification. In the FFP illustration with the SFP glass, the 5x “zoom” 100 yard tick reticle measurement would be 1/5th of the non “zoom” tick measurement. These particular kinds of scopes work for:
- Long distance types of shooting where shooters have more time to make ballistic calculations
- Shooting where most of the shots happen within much shorter spaces and ranges
- Shooters who prefer a clearer optic sight picture without room used up by the enlarged FFP reticle
Glass Zoom
The amount of magnification a scope offers is figured out by the diameter, thickness, and curvatures of the lenses inside of the rifle scope. The zoom of the scope is the “power” of the scope.
Fixed Power Lens Rifle Glass
A single power rifle scope and optic comes with a magnification number designator like 4×32. This means the zoom power of the scope is 4x power while the objective lens is 32mm. The magnification of this kind of scope can not adjust since it is a fixed power scope.
Variable Power Lens Glass Info
Variable power rifle scopes can be modified between magnified levels. The power modification is handled by using the power ring part of the scope near the rear of the scope by the eye bell.
Power Levels and Range Correlations
Here are some suggested scope powers and the distances where they could be successfully used. Always remember that higher power glass will not be as practical as lower magnification level optics and scopes because excessive zoom can be a negative thing in certain situations. The same relates to extended distances where the shooter needs to have adequate power to see where to best aim the rifle at the target.
Scope Lens Finish
All contemporary rifle scope and optic lenses are coated. Lens coating can be an essential element of a rifle’s setup when buying high end rifle optics and scope systems.
HD Versus ED Lenses
Some scope producers likewise use “HD” or high-definition lens finishings which use various methods, aspects, polarizations, and chemicals to draw out various colors and viewable quality through the lens. Some scope manufacturers use “HD” to refer to “ED” indicating extra-low dispersion glass.
Rifle Optic Lens Single Finish Versus Multi-Coating
Various optic lenses can also have various finishes used to them. All lenses usually have at least some type of treatment or covering applied to them before being used in a rifle scope or optic.
This lens treatment can protect the lens from scratches while decreasing glare and other less beneficial things experienced in the shooting environment while sighting in with the scope. The quality of a single covered lens depends on the scope producer and how much you paid for it.
Some scope producers also make it a point to specify if their optic lenses are coated or “multi” coated. This suggests the lens has had numerous treatments applied to them. If a lens gets numerous treatments, it can prove that a producer is taking numerous steps to combat various environmental aspects like an anti-glare coating, a scratch resistant anti-abrasion coating, followed by a hydrophilic finishing. This additionally doesn’t always mean the multi-coated lens is much better than a single covered lens. Being “much better” hinges on the producer’s lens treatment techniques and the quality of glass used in building the rifle glass.
Hydrophobic Lens Coverings
Water on a scope’s lens doesn’t support keeping a clear sight picture through an optic at all. Numerous top of the line or high-end scope makers will coat their lenses with a hydrophobic or hydrophilic finishing. The Steiner Optics Nano-Protection is a fine example of this kind of treatment. It provides protection for the surface area of the Steiner glass lens so the H2O molecules can not bind to it or develop surface tension. The outcome is that the water beads sheet off of the scope to preserve a clear, water free sight picture.
Options for Mounting Rifle Optics on Firearms
Mounting solutions for scopes are available in a couple of options. There are the standard scope rings which are separately mounted to the optic and one-piece mounts which cradle the scope. These different kinds of mounts also typically come in quick release variations which use toss levers which permit rifle shooters to rapidly mount and dismount the optics.
Glass Mounting Solutions with Hex Key Rings
Normal, clamp design 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 different rings to support the optic, and are often made from 7075 T6 billet aluminum which is developed for long distance precision shooting. This type of scope install is fine for rifles which need a durable, sound mounting solution which will not move no matter how much the scope is moved or abused.
Quick-Release Cantilever Rifle Glass Rings
These types of quick-release rifle scope mounts can be used to quickly remove a scope from a rifle and reattach it to a different rifle. Several scopes can also be switched out if they all use a complementary style mount. The quick detach mount style is CNC machined from anodized 6061 T6 aluminum and the mounting levers attach firmly to a flat top type Picatinny rail. This lets the scope to be sighted in while on the rifle, removed from the rifle, and remounted while retaining the original sighting settings. These types of mounts come in beneficial for rifles which are carried a lot, to take off the glass from the rifle for protection, or for aiming systems which are employed between numerous rifles. An example of this mount style is the 30mm mount from Vortex Optics. It generally costs around $250 USD
Rifle Scope Tube Sealing and Gas Purging
Wetness inside your rifle optic can ruin a day of shooting and your costly optic by triggering fogging and creating residue inside of the scope tube. Most scopes avoid moisture from going into the scope tube with a system of sealing O-rings which are water resistant.
Gas Purged Scope Tubes
Another part of preventing the buildup of moisture inside of the rifle scope tube is filling the tube with a gas like nitrogen. Because this space is currently occupied by the gas, the scope is less affected by temp alterations and pressure differences from the outside environment which may possibly allow water vapor to seep in around the seals to fill the void which would otherwise exist. These are good qualities of a decent rifle scope to seek out.
