The smallest optics that theoretically fit in this genre are monoculars. They have their uses but are actually pocketable. They have some serious limitations too. Monoculars are a discussion for another day. In this instance, we shall restrict ourselves to the smaller scopes, the discussion revolving around the Pentax 65mm EDA scope (angled). The scope is also available as a straight scope (the model name changes to 65 mm ED).

In order to view that little image, we need an eyepiece. The eyepiece, even the simplest one usually used on spotting scopes, will have 6 shaped surfaces in two different elements made up of different types of glass. For optimal power, field of view, eye relief and distortion correction,

Have you ever wondered what is the difference between a telescope and a spotting scope? Both are designed to watch distant things. But while telescopes (they come in different designs and capabilities) are primarily aimed at watching the night skies, spotting scopes are aimed at terrestrial viewing. In case of the latter, a prism assembly makes sure the viewer sees an erect image of the subject.

The common brands available in India would be Nikon, Olympus, occasionally Bushnell, a few Pentax binoculars. Then there are the Zeiss, the Leicas and if you push it, the Swarovski. Sometimes with some specialized dealers, you can get Hawke or Celestron binoculars.

Nothing contained in this article is original. Information has been sourced from the public domain. I do not claim any copyright or authorship. If any reader notices an error and brings it to my notice, I shall be happy to correct it. I have tried to explain the background, evolution, definitions, trends etc so that the reader can form an informed opinion while selecting/purchasing optics and while using/ maintaining them.