9x60 porro Binoculars

Detailed Product Description

1624  L9X60 L-Series Binoculars: 

CODE: 1624

Model:L9×60

Power: 9x

Objective Diameter (mm):60

Field of View ft@1000 yds/m@1000m:285/95

Height × Width(mm):220x205

Weight (g):1160

Other Feature: BAK4 Prism, Long Eye Relief

 

Feature of  long eye relief Binoculars:

 

• Long Eye Relief
• Blue, Ruby, Green or Multi-coated
• Premium Image
• Fast Roll Down Eyecup
• Bak4 Prism

          Long eye relief binoculars are specially designed for eyeglass wearers.

Optics within the long eye relief system direct the focal point further behind the eyepiece so eyeglass or sunglass wearers can see the full field of view wearing the glass.

 Advantage of Bak4 optical glass

           High-index Bak4 optical prism glass is better than the usually used low-index Bk7 glass.

         The low cost glass Bk7 usually causes excessive refraction of light and trends to produce a  vegnetting  effect which looks as a rhombus shape around the edges of the image.

        To compare this effect, just hold the tow binoculars in front of you at arms length, viewing through the eyepieces. In the binoculars with Bk7 prisms, you will see decreased will see decreased light transmission and image brightness compared with the clear crisp images of the binoculars with Bak4 optical glass.