Ornithology
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BinocularsBinoculars are essential birding equipment. Binoculars for birding should be lightweight and bright. A general rule of thumb for brightness is that in order to provide enough light, the size of the objective should be five times the magnification power. For example, 7 power X 35 mm objective, or 8 power X 40 mm objective, etc. If the size of the objective is less than 5 times the magnification, the binoculars will not be good in low light conditions. For a more detailed description of binocular types and uses check this out: Detailed description: Binoculars
Purchasing binocularsBetter View Desired Optical Reviews - http://betterviewdesired.com/Eagle Optics - http://www.eagleoptics.com/index.asp?AID=1484426&PID=96600