Bushnell R5 handleiding
Handleiding
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Aberration - Aberrations are imperfections inherent to all optics designs. The
best optics limit aberration as much as possible to provide a clear, accurate
image. One example of aberration is chromatic aberration, which occurs
when lenses in an optic incorrectly refract different colors of light. The result
of this aberration is differing focal points and a distorted image.
Bullet Drop Compensation - BDC The principle of interaction between the
fired bullet, gravity, and target indicators.
Coatings - Microscopic coatings on the lens surfaces reduce light loss and
glare due to reflection. Coated lenses offer a brighter, higher-contrast image
with less eyestrain. More coatings allow better light transmission, but it is
possible to have a scope with a single coating to outperform a scope with
multicoated lenses greatly. It all depends on the quality of the coatings and
the glass. Good quality does not come cheap. The following are acceptable
terms for coatings:
• Coated: A single layer on at least one lens surface.
• Fully Coated: A single layer on all air to glass surfaces.
• Multicoated: Multiple layers on at least one lens surface.
• Fully Multicoated: Multiple layers on all air to glass surfaces.
Click - A click is one adjustment notch on the windage or elevation turret of a
scope. One-click most often changes a scope’s point of impact 1/4 inch at 100
yards. Some clicks are 1/8 inch, 1/2 inch, one inch, or even more.
Exit Pupil - An exit pupil is the small circle (column) of light visible in the
ocular lens when you hold your scope (or binocular) at arm’s length. The
larger the exit pupil is, the brighter the image entering your eye. To find the
exit pupil for your scope, divide the objective lens diameter in millimeters by
the magnification. For example, if your scope is four power (4X), and your
objective lens is thirty-six millimeters in diameter (36mm), divide four into
36, and it equals 9. Therefore, nine would be the exit pupil size in diameter in
millimeters. Typically measured in millimeters, the larger the size of the exit
pupil, the brighter the scope image will be.
Eye Relief - Eye relief is the distance your eye must be from the ocular lens
and still get a full field of view. This measurement is usually defined in inches.
First Focal Plane - FFP is an indication of the first (focal) plane to the position
of the reticle. FFP scopes retain the amount of stretch, while the size of the
crosshair of the sight will correlate with the image’s magnification.
Field of View - Field of view (FOV) is the amount of area seen through your
scope from right to left at 100 yards. As magnification is increased, FOV is
lessened. As magnification is decreased, FOV is increased.
Hold Over/Under - Holdover/under is the amount of point of aim change
either above or below your target, without adjusting your scope, to adjust for
the trajectory of your projectile.
Illuminated Reticles - Many rifle scopes have battery-operated reticles that
light up when activated. In hunting, this color is nearly always red. In tactical
conditions, green is often another available color. The entire part, center, or
certain feature of a reticle can be illuminated.
Magnification - Also called the power setting or rating, magnification is a
power rating that defines how much or far the scope will magnify your sight.
Power settings are measured against the naked eye. For example, a 3 power
scope would offer the user 3 times the view of what they could see with the
naked eye, while a 10 power would mean 10 times the power of the naked eye.
Main tube - The main tube is the scope portion between the objective bell
and the eyepiece. Most scopes have either a 1-inch or 30mm main tube. The
added tube diameter increases windage and elevation travel range. Long-
range target scopes may have tube diameters between 34 and 36mms. Scope
rings are built to specific scopes with specific main tube diameters.
MIL/MRAD – Milliradians of Angle - A measurement system is used to
determine the correct elevation and windage adjustments to sight in your
scope. Typically found on European-based optics.
Minute of Angle - Minute of Angle (MOA) is a unit of measurement within a
circle and is 1.0472 inches at 100 yards. For all practical purposes, it is called
1 inch at 100 yards. It is 2 inches at 200 yards, 5 inches at 500 yards, one-half
inch at 50 yards, etcetera.
MOA is generally the standard for measuring the accuracy of a rifle. A rifle
that will shoot a 3 to 5 shot group that measures under an inch, it’s considered
an MOA shooter. If it groups at 1/2 an inch, it’s a sub-MOA shooter.
MIL vs. MOA: MIL is a common abbreviated form of milliradians, while MOA
is an abbreviation of Minute of Angle. Both are measurements of angle (not
distance or length, as some shooters believe). As ranges increase, so does 1
MOA or 1 MIL value. At 100 yards, an MOA is 1.047 inches, so a scope with ¼
MOA per click adjustments should move the point of impact about .25-inches
every click at 100 yards (and .50-inches at 200 yards). One MIL is 3.6 inches
at 100 yards, and since most MIL scopes have 1/10 click adjustments, each
click will adjust the point of impact by .36 inches at 100 yards.
Objective Lens - The objective lens is the lens closest to the object being
viewed. It is measured in millimeters in diameter. A larger objective lens
allows more light to enter the scope.
Original Zero - This is the distance you sighted your scope. Zero reset
features are popular for getting you back to your original zero. When dialing
up/making scope adjustments, you don’t need to remember how many clicks
you made and how to get back. Instead, turn the turret back till it stops, and
you’re back to your 100 yards or “x” yard zero.
Parallax - Parallax is an optical error or illusion typically found in scopes
designed for longer ranges. Without getting overly technical, parallax occurs
when the optical image that you see through the scope is created in front of
behind the reticle. This means that the target you are looking at isn’t being
correctly portrayed in its actual location. Some scope models feature a
parallax compensation feature built-in to correct this issue. The most popular
parallax compensation seen today is either through a front objective lens or
side focus parallax. With these features, the shooter can adjust the distance
(typically in yards) to the target, and the scope is preset to be parallax-free
at those predefined distances. Most riflescopes without adjustable objectives
are set at 100 or 150 yards. Rimfire scopes are often set at 50 or 60 yards, and
shotgun scopes are often set at 60 or 75 yards.
Reticle - Reticle refers to the sighting device used for a specific scope. A
reticle is a system of lines, dots, or crosshairs in your scope that appear
superimposed on your target. Reticles come in various variations and
configurations, designed for very specific uses.
Trajectory - The trajectory is the flight of your projectile after it leaves the
barrel. This flight is an arc. The amount of arc depends on the projectile
weight and velocity.
Turret - A turret is one of two knobs in the outside center part of the scope
tube. They are marked in increments and are used to adjust elevation and
windage for points of impact change. These knobs protrude from the turret
housing.
Windage - This is the horizontal crosshair of the reticle.
Zero - Zero is the distance you are sighted in and references the flight of the
projectile. For example, if you are sighted in at 200 yards, you have a 200
yard zero.
GLOSSARY OF COMMON RIFLESCOPE TERMS
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Productinformatie
| Merk | Bushnell |
| Model | R5 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 7861 MB |
