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3.2 Body assembly ( Fig. 2)

  Figure  2,  illustrates  the  basic  design  and 

structure  of  a  porro  prism  binocular  like 

the  7x30.  The  binocular  consists  of  identi-

cal  two  halves.  A  right  side  and  a  left  side.

  Item 1 is the lens assembly including the spe-

cial reticle housing. The range adjustment for the 

diopter settings is from -5 to+7. Each mark of the 

diopter dial on the eyepiece ref lects one diopter 

adjustment.  Item  2  is  the  main  binocular  body 

housing the porro prism assembly. Item 3 is the 

objective lens assembly where the light from the 

image enters the binocular. Item 4 contains the 

interpupillary  disc  indicating  the  settings  that 

correspond to the distance between the observ-

er’s  eyes.  This  distance  ranges  from  56  mm  to 

72 mm. Item 5 which is on the connecting shaft 

2

5

3

1

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Summary of Contents for 7x30

Page 1: ...7x30 Instructions for use and maintenance...

Page 2: ...Index 1 General Overview 2 2 Technical Specification 2 3 Construction Specifications 3 4 How to use a Binocular with a military style reticle 6 5 Binocular and accessories 15 6 How to care for your bi...

Page 3: ...it is a flow er bird where color is important or a military target The user can have confidence whether it is being used in a military public security traffic control boating aviation or any other app...

Page 4: ...ance 56 72 mm Resolution max 5 5 2 2 Size and mass Size length x width x height 174mm X 48mm X 110mm Weight Binoculars max 0 5kg 1 25 lbs Complete product max 1 0kg 2 5 lbs 3 Construction Specificatio...

Page 5: ...2 fig 1 it becomes right side up erect and changed from right to left to left to right so written words appear correct Until this happen the word word looks like drow At this point the image rays are...

Page 6: ...the diopter settings is from 5 to 7 Each mark of the diopter dial on the eyepiece reflects one diopter adjustment Item 2 is the main binocular body housing the porro prism assembly Item 3 is the obje...

Page 7: ...te the image will not be clear You will adjust for clarity in the next step You must first fit the binocular to your eye width distance 4 1 2 Adjusting for the use of regular glasses or sunglasses Thi...

Page 8: ...mber the diopter setting for the right eye Now closing your right eye repeat the process you used for the right eye and turn the left diopter until you have a per fectly clear image Again take note of...

Page 9: ...orth point A mil s reticule can measure the azimuth angle upper and lower angle distance and size of an object or target The visual distance reticule lines can measure the distance of normal object ea...

Page 10: ...rget then read the value of the scale at which another target was located on the reticule The value is the measured azimuth mil As shown in fig 4 the azimuth of the target tank is 0 20 mils The azi mu...

Page 11: ...ing the image in a position where the vertical line splits the image You will need to take two image readings Mentally consider the horizontal with three reference points Point A is the 50 mil point o...

Page 12: ...ulations you can now obtain the ship s total mil azimuth of 130 mils 60 70 4 2 3 Upper and lower angel measurement Upper and lower angel means the angel included between any two targets or two ends of...

Page 13: ...to the one that is discussed in the linear measurements in 4 2 2 B above 4 2 4 How to use the reticle to measure dis tance 4 2 4 A The distance measurement of a target can be calculated by using the...

Page 14: ...4 2 4 B How to measure distance directly using the reticle in Fig 7 For example if the target is 2 meters in height place the lower part of the target at the horizon tal line on the reticule with the...

Page 15: ...he target using the formula For example the distance is 0 6km between the observer and the target You can measure that the azimuth is 60 0 60 and the upper and lower angle is 30 0 30 So using the form...

Page 16: ...ined in order to keep it in good working order 6 1 General Maintenance 6 1 1 Lenses Always clean the lenses after each use and before you put it back in it s carrying case After each use brush any dus...

Page 17: ...infinity position to avoid any damage of the ocular system in case of accident 6 1 4 Avoid any extreme shaking or dropping of the binocular This may damage the internal optics and prisms Store the bi...

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