Field glasses come in a wide range of brands and models that could be rather expensive but if you know where to look, you can always buy cheap used binoculars. How good a bargain you can get will depend on a few considerations.
 High Quality Binoculars 22x36 field lens telescopes US $12.63 |
 Nikon Monarch X Binoculars 85x45 Waterproof Fogproof US $301.00 |
 LEUPOLD OLYMPIC 10 x 50 Field Binoculars waterproof US $199.99 |
 Day Night Zoom Binoculars 10 30 x60VISION Ruby lense US $49.99 |
 Day Night Zoom Binoculars SAKURA10 90x80Ruby lenses US $49.99 |
 Nikon 10 x 25 binoculars with case and lanyard GREAT US $20.55 |
 CARSON 12X63 BINOCULARS US $25.00 |
 Bushnell PowerView 13 2514 8 x 21 Folding Binoculars US $.99 |
 SWIFT AUDUBON 85X44 85 X 44 BINOCULARS 804R US $75.00 |
 Huge Day Night Binoculars 20x70 VISIONRuby lenses US $45.99 |
One of these is what you need an optics for. There are several types of field glasses that are intended for different purposes. Broadly, they can be classified into:
• Astronomical
• Birding and Wildlife
• Marine
• Compacts and Opera Glasses
• Sporting, Zoom, and General Purpose
• Night Vision
• Digital Camera
Specialized types such as night vision and digital camera glasses, generally costs more. Brand is also a major issue. Some manufacturers have earned a reputation for producing quality products that they can command premium prices. Also, even within the broad classification mentioned, there are lots of variations in terms of magnification, objective lens diameter, lens coating, exit pupil, prisms, and case material. These will have a bearing on the cost of field glasses, both new and pre-owned.
The Internet is a good place to look for bargains. There are thousands of cheap used binoculars advertised in hundreds of websites. And these come in virtually all brands and types. Amateur astronomers can find glasses with big objective lenses for use in low-light conditions. Birdwatchers and wildlife enthusiasts can browse through a long list of lightweight field glasses with a wide field of view. Pre-owned marine field glasses are also available for fishermen. And for those who like to watch operas or open field concerts, they can also find compacts and opera glasses. Sporting, zoom, and general purpose optics are used in a wide variety of applications. These, too, are an be found on the Internet. Night vision and digital camera optics are also available.
You will need to be patient when browsing the Internet in search for cheap used binoculars. Visit as many websites as you can and study the features of each unit you find. Compare their prices and determine if indeed they are good bargains. This way, you can get yourself pre-owned field glasses that are as good as new.