Omegon Plössl 4mm Eyepiece (1.25 inch): Classic four-element with sharp image
The Omegon Plössl 4 mm is a classic eyepiece with four lens elements and multi-coating. The shortest focal length in the series, for maximum magnification in calm atmospheric conditions.
With a telescope of 650mm focal length, 4mm gives a magnification of 163x, and at 900mm, 225x. Follow the rule of thumb of a maximum of 2x the aperture in millimeters: then lunar craters and planetary detail will remain sharp instead of blurry.
Features
- Classic Plössl design with four lens elements: sharp to the edge, even on faster telescopes
- Apparent field of view of 50 degrees
- Multicoating for high light transmission and good contrast
- Rubber eyecup against stray light from the side
- Filter thread for moon and color filters (1.25 inch)
Compatibility
Fits any telescope with a 1.25-inch eyepiece holder: Newtonians, Dobsonian, refractors, and Schmidt-Cassegrains. Not suitable for smart telescopes without interchangeable eyepieces.
Specifications
| Focal length | 4 mm |
| Apparent field of view | 50 degrees |
| Optical design | Plössl, 4 lens elements, multicoated |
| Mount | 1.25 inch (31.7 mm), with filter thread |
| Eyecup | rubber |
| Series | Omegon Plössl |
You can find more accessories for this brand at the Omegon brand page.
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