TS Optics HR Planetary eyepiece

TS Optics HR Planetary Eyepiece: Contrast When Planetary Detail Calls For It

The TS Optics HR Planetary Eyepiece is built for one purpose: maximum contrast and sharpness on the moon, planets, and double stars. Multi-coated lens elements and internal baffling suppress reflections, so subtle detail on a planetary disk doesn't get lost in stray light.

The series runs from 2.5mm to 25mm focal length, all in a 1.25 inch size. This allows you to choose the exact magnification that suits your telescope and the air quality.

What focal length do you choose

Divide the focal length of your telescope by that of the eyepiece for magnification. Keep 2x the aperture in millimeters as an upper limit: for a 150 mm telescope, 300x is the realistic maximum. Short focal lengths (2.5 to 5 mm) are for large apertures and steady air; 7 to 9 mm is the daily planetary magnification for most telescopes.

Comfortable at high magnification

The eye relief remains comfortable even with the short focal lengths, so you don't have to look with your eyelashes against the lens. The 1.25 inch mount has filter threads for color and moon filters.

Featured accessories

Combine the eyepiece with a color filter set for planetary detail or a moon filter for comfortable moon viewing. An eyepiece pouch keeps the set together dust-free.

For whom yes and for whom no

• ✓ Moon and planet observers who prioritize contrast over a wide field of view
• ✓ How to aim for expansion based on focal length without a large budget
• ✗ Deep-sky observers looking for a wide field of view: choose a wide-angle eyepiece

Specifications

You can find more accessories for this merk at the TS Optics merk Page.