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birding binoculars

Birders can only see so many birds with out the assistance of binoculars. If you want to step up and become a serious birder with a large list of birds under your belt your going to need a good pair of binoculars.

Those unfamiliar with buying binoculars we've listed a couple basics for buying a good intermediate to advance set of binoculars.

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Birding Guide Featured Topic
FOCUS POINT - Binoculars


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the Birding Guide reviewed.



Binocular Review


Magnification:
This refers to the power of the binoculars. A pair of 7x35 binos are magnified 7 times. The lower the power, the wider an area you can see through your binoculars and the brighter the image. This is particularly important in low light situations such as dawn or dusk. Higher powered binoculars are useful for distant birds in open landscapes with abundant light.

Aperture: This is the measurement of the lens furthest from your eye, or the "objective lens". The objective lens pulls in light from your surroundings similar to a camera lens. In a pair of 7x35mm binoculars, the aperture is 35mm. A larger aperture can compensate for the loss of light associated with a higher power, the trade-off is greater cost and weight.

Glasses:
If you wear glasses at all times, do not choose a pair of binoculars without testing them with your glasses. Glasses increase the distance between the lens and your eye, changing the eye relief.

Focus: Poorly focused binoculars or binoculars that are out of alignment can cause dizziness, eyestrain, or severe eye-ache. To avoid this, be sure to calibrate your binoculars before you go birding or after anyone has used them. Here's how:

1. Adjust the two halves of the binoculars so the eyepieces are the same distance apart as your eyes.

2. Pick a distant fixed object to focus on.

3. Turn the center focus all the way to the right.

4. Close your left eye and adjust the right eye piece (the secondary focus knob) until the object is in focus for the right eye. This feature equalizes the difference in strength of your eyes. If your binoculars do not have a focus knob on the right eyepiece, look for this knob either in front of the center focus knob, or around the objective lens on the right. For future reference, note exact location of this setting (+,-, or 0 on most binoculars).

5. Open your left eye and adjust the central focus knob until that distant object is clearly focused.
Have patience, this can be a very frustrating experience and may take many tries to get it right! If you or a more experienced birder cannot focus your binoculars clearly, you may need to have them re-aligned.

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Source: The US Fish and Wildlife Service

BIRD RESCUE
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Migrating birds stay on track because of chemical reactions in their bodies that are influenced by the Earth's magnetic field...
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   April 9, 2006

BIRD RESCUE AFTER
RIVER OIL SPILL

-- BBC News

Animal rescue teams have been working to save 35 swans and ducks after an oil spill on Southampton's River Itchen.


           bird news


   March 3, 2006

RAY OF HOPE FOR
ENDANGERED BIRD

-- BBC News

The only known habitat of India's rarest bird may yet be saved from destruction in a last-minute effort to re-route an irrigation canal...


           bird news

   November 19, 2004

ASIAN BIRDS FACE
THREAT OF EXTINCTION

-- Bangkok, Thailand

More than 300 bird species in Asia are threatened with extinction due to logging, farming and development.

Conservationists along with bird specialists were speaking in Bangkok on the sidelines of the World Conservation Union meeting, attended by 6000 officials, scientists, executives and environmentalists from around the world...

           bird news

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