Baader Planetarium

One product, at the top of its shelf

Baader Planetarium is a German maker of optics and accessories. On this site it is represented by a single eyepiece, the Hyperion Universal Zoom Mark IV, the most expensive product on the zoom eyepieces shelf at about $396 on November 7, 2026.

Specified as a system

The zoom covers 8 to 24 mm with click stops at 8, 12, 16, 20 and 24 mm, stated for binoviewing. It comes with both 1.25-inch and 2-inch barrels, three eyecups, and an M43 photo thread for camera adapters. Baader states a 68-degree widefield, a flat field and its Phantom Coating Group multi-coatings.

What is not published

Eye relief and field as figures at each end of the range. The listing says long eye relief and widefield without numbers.

Against the rest of the shelf

Celestron’s 8-24 mm zoom and Alstar’s publish 40 to 60 degrees and 15 to 18 mm of eye relief at a fraction of the price, without click stops, a 2-inch barrel or a camera thread. The side-by-side is at Baader Hyperion Zoom vs Celestron 8-24.

Reading a Baader page here

Read it as a system product: the barrels, stops and thread are what the price buys.