Carson Optical 7x18 Guía Del Usuario

Zoom binoculars offer the user a range of magnifications.  The zoom function can be operated by 
hand using a lever, or by switch when driven by a motor.  Zoom systems vary by model.  
Waterproof binoculars and fog-proof binoculars should be nitrogen purged and O-ring sealed in order 
for their internal lenses to be truly resistant to fogging and/or water damage.

Binoculars come in two distinct styles in which design is dependent upon the type of prism system 

used.  The image that passes through a binocular is upside down (a function of the lens) and needs to be 

corrected.  This prism is the optical glass inside a binocular whose purpose is to “invert” the image.

Roof Prism System:  the prisms overlap closely allowing the 

objective (front) lens to line up directly with the eyepieces.  

The result is a slim, streamlined shape in which the lenses and 

prisms that magnify and correct the image are in a straight line.

eyepiece

objective lens

instructions_8page.indd   4

8/10/04   1:19:45 PM