Nikon binocular serial number lookup free#

In my little collection I have some real gems, luminaries of the binocular firmament. They do however give spectacular views of the Milky Way.ДЇor clarity of image though you need a good pair of prismatics. For instance I have a pair of 3.5x50's with a 8В°.5 field of view (fov) the snag is the exit pupil (virtual) is 14mm, so the OG's are effectively stopped down at least 50% (7mm eye pupil), with a consequent 75% light loss. (For a typical example of what can happen when buying a vintage binocular on eBay, see end of article).ДЇield glasses are less of a problem in this respect because even if the barrels are not exactly aligned parallel to one another, you can still fuse the images, and field glasses are so low power, astigmatism is not an issue.ДЇield glasses can be acquired that have negative achromatic eyepieces, and they offer a wide real field, even if the apparent field is narrow. You also have to make sure they're collimated, and since most sellers do not understand what collimated means, you have to explain to them what to look for in a decollimated pair.

Nikon binocular serial number lookup free#

It is easy to buy very high quality vintage binoculars on eBayUK, but you have to make sure the optics are clean, free of dust, dirt, insects, and fungus. But I like good clean optics, and many modern binoculars are woefully deficient in optical quality, unless you shell out a grand or more for a top notch pair. I prefer a binocular you can carry with you to a star party, for casual star gazing. You really need a parallelogram mount for binoculars that size and larger. They were too heavy to hold for more than a couple of minutes, and on a photographic tripod, too awkward to point near the zenith. I used to own a pair of 11x80's bought off Leo Henzl Jnr in 1979, but I sold them 10 years later. These field glasses and binoculars are all hand holdable, and suitable for astronomy. I prefer solidly made binoculars, and have amassed a modest little collection of prized specimens, mostly acquired off eBayUK, but also charity shops and car boot fairs. However it wasn't too long before they got knocked out of collimation, and at ВЈ12 you may as well buy another, or use it as a monocular!

I'm not a fan of modern binoculars, although I have to confess to owning a small roof prism bino, 8x21, for hiking. 'Field Glasses & prismatic binoculars suitable for astronomy'