Baader Planetarium Hyperion Zoom Eyepiece MkIV

The click-stop mechanism provides tactile feedback at five specific focal lengths, allowing you to switch magnifications without taking your eye away from the eyepiece. This makes it much easier to compare views or quickly adjust for changing atmospheric conditions.

Yes, the eyepiece is engineered to be parfocal, meaning you should not need to significantly adjust your focus when zooming between focal lengths. While minor tweaks might be necessary depending on your specific telescope's focuser, it largely eliminates the frustration of losing your target during magnification changes.

The 2.25x Barlow lens effectively doubles the versatility of the kit by extending the focal length range down to 3.6mm. It allows you to achieve much higher magnifications for planetary and lunar observation without needing to carry a separate, dedicated high-power eyepiece.

The Hyperion Zoom is designed to be highly adaptable and fits standard 1.25-inch and 2-inch telescope focusers. Its 55mm housing diameter is also compact enough to avoid clearance issues on most standard telescope setups.

The apparent field of view varies from 48° at the 24mm setting to 68° at the 8mm setting. You will find that the field of view naturally widens as you increase magnification, which helps keep objects centered and visible even at higher power.

Flat-field optics are designed to correct field curvature, ensuring that stars or terrestrial objects remain sharp and in focus from the center of the view all the way to the edges. This prevents the common issue where the center of the image is crisp while the periphery appears blurry.