This eyepiece is a real insider tip when it comes to planetary observation or double star observation with high magnification. The view is much more comfortable than with a Plössl eyepiece with a similar focal length. Even beginners will have no problem seeing the entire field of view. Nevertheless, the eyepiece manages with only three lenses. The contrast and image brightness are correspondingly good.
Revised Kellner eyepieces are a further development of the classic Kellner. The field of view is improved compared to Kellner eyepieces. The view through RK eyepieces is also very comfortable.
RKs are a good choice for stargazers looking for an inexpensive and versatile eyepiece. The comfortable viewing experience makes RK eyepieces particularly recommended for beginners. The RK is also well suited for centring and tracking.
The RK eyepiece has a rubber eyecup that prevents stray light from entering from the side. It can be folded down for eyeglass wearers.
