Description

These eyepieces, primarily intended for astronomical telescopes, are very suitable for incorporation into other optical instruments for viewing or projecting an image. They are of high optical quality and available in a wide range of powers. The image plane is external to the optics and can be accessed by unscrewing the fitting tube, for use with an independently-mounted graticule, etc.

The Kellner (EK) series is roughly equivalent to microscope widefield eyepieces, at a very competitive price. The orthoscopic (EO) series has similar field size but better correction and a flatter field, while the Erfle (EE) offers a much wider field.