If you are into searching for and viewing damsel flies and dragonflies, you will be interested in the close focus of 4.5 feet. 

The  Diamondback, http://www.kingbirdfeeders.com/05-VortexDiamondback8x42Binoculars.htm, is a versatile model.  The specifications discussed above make this an excellent choice for astronomy, birding, or butterfly viewing.  It is as valuable in the woods as in a marine setting.

Vortex Optics endeavors to manufacture quality products.  It is willing to back up this goal with a lifetime no questions asked warranty.  They will repair or replace your item without asking for any explanation.