SVBONY Binocular User Manual
- October 28, 2023
- SVBONY
Table of Contents
Binocular
User Manual
Binocular
Congratulations on your choice of our binocular. Your binocular is a precision instrument designed to provide many years of pleasurable viewing. This guide will help you achieve optimum performance by explaining how you can adjust the binocular to your eyes, how to care for this instrument, and. Read the instrument carefully before using your binocular. Remove the eyepiece lens cap covering, and then remove the objective lens cover.
Package Includes
- 7×50 Binoculars
- Soft Bag
- Neck Strap
- Eyepiece Cap
- Two Objective Lens Cap
- Lens Cleaning Cloth
- Two Button Battery
- User Manual
Technical specifications
- Magnification: 7x
- Objective lens: 50mm
- Eyepiece diameter: 23mm
- Prism System: Porro Bak4
- Field of View: 396 ft/1000yds
- Exit Pupil: 7mm
- Eye Relief: 24mm
- Waterproof Grade: IPX7
- Lens Coating: FMC
- Body Material: Plastic steel + Rubber
- Eyecups Type: Folding Removable
- Focus System: IF`
- Tripod Adaptable: Yes
- Net Weight: 876g
Do not look directly into the sun with the binocular; this can be very damaging to the eyes.
Adjusting the Interpupillary Distance (IPD)
Since the distance between the eyes (specifically, the distance between the centers of the pupils) varies among individuals, the two eyepieces of the binoculars must be correctly aligned (adjusted). This is called adjusting the interpupillary distance. To adjust this distance, lift the binoculars up to your eyes (using both hands) and look through them at an object in the distance. Move the two halves of the binoculars about the hinge until you see one clear circle of image through both eyes.
Focusing
Since most people have a variance of vision from their left eye to their right eye, you must adjust the focusing system. Use the following steps to achieve focus:
- Close your right eye and look through the left side of the binoculars with your left eye at the subject matter. Rotate the center focusing wheel until the image appears in sharp focus;
- Close your left eye and look through the right eyepiece (called the diopter). Rotate the right eyepiece until the image appears in sharp focus;
- Look through both eyepieces with both eyes open. Since you’ve already adjusted the right eyepiece, use only the center focusing wheel to refocus on a new object at a different distance.
Hint: Eyeglasses worn for nearsightedness should be worn when using binoculars as you may not be able to reach a sharp focus at infinity without them.
Set the Rubber Eyecups
Keep the Rubber Eyecup up if you do not wear eyeglasses but fold them down if
you do wear eyeglasses to obtain the maximum field of view.
Installing the Batteries
The batteries included with your binocular are for illuminating the compass,
so you can see it easily in the dark. You need to install the batteries which
are located in the case pocket. Unscrew the battery cap by hand and then
remove the screw with a coin or screwdriver. The batteries are to be installed
with the positive (+) side facing up towards you. Replace the screw and
battery cap. If you will not be using the binocular for a long period of time
(a few months or more), you should take the batteries out to preserve their
life.
Using the Reticle as a Measuring Device
-
View Angle
View Angle of an object is the angle between the rays from the Binocular to its edges. Usually, this angle is measured at the horizontal or vertical direction, and defined as Horizontal View Angle and Vertical View Angle. A mil’s Reticle (shown to the right) that has a horizontal and vertical scale can measure the viewing angle of an object. The SV27 uses 10 mils for each number (1, 2, 3… as shown here). -
Measuring the Horizontal View Angle
When the Horizontal View Angle is smaller than the horizontal scale range (-40~+40 mils) inside the binocular, aim one edge of the object at a horizontal scale line (the center or the outmost line is selected according to the image size of the object usually) and read its value. Then read the value of the scale at which another edge was located. Add these two values and this is the measured Horizontal View Angle. The Horizontal View Angle of the target (sailboat) is 5 decade mils (50 mils).
When the Horizontal View Angle is larger than the horizontal scale range (-40~+40 mils), use vertical line splits (for example: mast, sail, etc.) on the object can be selected to make the necessary estimated measurements in a step by step fashion. -
Measuring the Vertical View Angle
Vertical View Angle measurement is similar to measuring the Horizontal View Angle. When the Vertical View Angle measurement is small, aim the intersecting point of the vertical and horizontal lines of the Reticle at the lower part of the object and read the scale value at the top of the object. The angle included between the upper and lower parts of the target (lighthouse) is 6 decade mils (60 mils).
When the Vertical View Angle is larger than the vertical scale range (60 mils), it can be measured in steps, and the angle can be obtained by summing up the value of each step. -
Using the Reticle to Measure Distance
The distance measurement of a target can be calculated by using mil Reticle.
The formula of distance measurement: L (km) = H (m)/ω
L- The distance between the observer and the object (km)
H – The height of the object (m)
ω – the View Angle of the object measured with the Reticle of the binocular (mil).
When measuring the distance, estimate the width or height of the object and next measure the View Angle of the object. Accordingly, you can calculate the distance between the observer and the object using the formula.
For example:
There is an adult whose height is 1.70 m. (H = 1.70 m)
The Vertical View Angle of the adult is 4 decade mils (40 mils)
L = H/ω=1.7/40 = 0.0425 km = 42.5 m
Therefore: the distance between the observer and the adult is 42.5 m. (for feet conversion, multiply 42.5 by 3.28).
Guarantee Clause
- Our product have one year guarantee and free after-sale service.
- Please fill in the form with the correct and true information in case we can resend the item to you.
Warranty Card
Product Model|
---|---
Purchasing Date|
Defect Reason|
Dealer Name|
Telephone|
User’s Name|
User’s Address|
User’s Email|