A classic or a limitless view:
why the design is important and why high magnification is often not the best solution.
- There is a huge number of eyepieces of many different types of construction on the amateur astronomy market.
- You’ll know terms such as apparent:
– field of view
– focal length
– exit pupil - you may still not really know which eyepiece is the right one for you.
- In order to remedy this, we have put together an overview of the different construction types with their advantages and disadvantages.
Eyepieces are a little like magnifying glasses, used to enlarge the intermediate image produced by the telescope. In principle, such a magnifying glass could consist of a single lens. However, since you’ll want to have different fields of view, an eyepiece must consist of a combination of lens elements spaced at a pre-determined distance from one another. And of course you want a comfortable eye relief and the correction of image defects. Finally, you’ll need a mount that holds the lenses. This is also referred to as the eyepiece barrel.