Astronomical Telescope Accessories TMB Eyepiece 58 Degree Wide-Angle Planetary HD Eyepiece for Moon Jupiter Saturn Observation Black 2.5mm to 9mm Focal Length Options
Astronomical Telescope Accessories TMB Eyepiece 58 Degree Wide-Angle Planetary HD Eyepiece for Moon Jupiter Saturn Observation Black 2.5mm to 9mm Focal Length Options
TMB 58 Degree Wide-Angle Planetary Eyepiece for Astronomical Telescopes Black Multi-Focal Options
When you look up at the night sky, you want an eyepiece that brings the moon, Jupiter, and Saturn into crisp view. This TMB-style planetary eyepiece offers a 58-degree apparent field of view, designed to provide wide, immersive images without the tunnel effect of narrower designs. Its optical construction uses four groups and six elements to help reduce chromatic aberration and edge softness, so you spend more time observing and less time adjusting focus. Whether you are tracking the phases of the moon or resolving the rings of Saturn, this eyepiece aims to deliver clear, detailed views that justify its place in your equipment case.
Features and Construction
Built around a tried optical formula, this eyepiece balances performance with practicality for amateur astronomers. Its design focuses on delivering sharp planetary views while maintaining a comfortable viewing experience.
Optical Design
The eyepiece uses a 4-group, 6-element lens arrangement. This configuration helps control common optical aberrations such as field curvature and lateral colour, which can blur planetary details. The 58-degree apparent field offers a noticeably wider view than standard eyepieces, making it easier to track celestial objects as they move across the field of view.
Eye Relief and Exit Pupil
With an exit pupil distance of 16 mm, the eyepiece provides enough eye relief for comfortable viewing, even for those who wear glasses. The exit pupil diameter of 9 mm ensures efficient light transmission from the telescope to your eye, which is particularly useful when observing faint lunar features or planet details under moderate magnification.
Choosing Your Focal Length
Selecting the right focal length depends on your telescope's focal ratio and the magnification you need for planetary observation. This eyepiece is available in multiple focal lengths to suit different setups.
Options from 2.5 mm to 9 mm
The range includes 2.5 mm, 3.2 mm, 4 mm, 4.5 mm, 5 mm, 6 mm, 7 mm, 7.5 mm, 8 mm, and 9 mm focal lengths. Shorter focal lengths deliver higher magnification, ideal for detailed views of Jupiter's bands or Saturn's rings, while longer focal lengths offer a wider field and lower magnification for lunar observation. Choose according to your telescope's specifications and the object you plan to study.
Practical Benefits for Observers
This eyepiece is designed to be a straightforward, reliable component of your astronomy kit. Its practical benefits focus on ease of use and consistent optical performance.
Reuse and Low Maintenance
The eyepiece requires minimal maintenance. Store it in a protective case when not in use, and clean the lenses only when necessary using a soft brush or lens cloth. The black body reduces stray light reflection, which helps maintain contrast during night observations.
Why Choose This Product
If you are looking for an eyepiece that offers a wide apparent field and multi-element optics without an excessive price tag, this TMB-style design is a practical choice. Its range of focal lengths allows you to match eyepiece to telescope for optimal planetary performance, making it a versatile addition to any amateur astronomer's collection.
