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.
 Sharper Image 8x22 Binocular with Compass case box and instruction book US $6.99 |
 Brand New Mini Adjustable 15 55x21 Zoom Monocular US $9.90 |
 Brand New Super Outdoor 16X40 84M 1000M Monocular Telescope US $9.99 |
 Leica Ultravid 8x50 Binocular US $796.00 |
 Magnacraft 4X30 Binocular US $10.49 |
 NEW Pulsar Night Vision Edge GS 1x20 Goggles US $729.00 |
 35 X Glasses Binocular Magnify Coated Fishing Opera US $39.93 |
 Brand Made in Russia BAIGISH 15x50 Telescope for hunting camping high quality US $49.99 |
 Brand New 8X40 Multifunction Compact Coated Binoculars US $19.99 |
 VINTAGE TRAVELLERS BINOCULARS 25X PHENOMENAL POCKET US $19.99 |
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. The same advice applies when buying used cell phones. This way, you can get yourself pre-owned field glasses that are as good as new.