1.25 Inch 2.5 -9mm Astronomical Telescope TMB Eyepiece 58 Degree

Key Benefits

• 58-degree field of view delivers a wide, immersive view of planetary surfaces and small deep-sky objects
• Six optical lenses reduce chromatic aberration and improve edge sharpness across the field
• 12mm eye relief allows comfortable viewing, especially for users wearing glasses
• 1.25 inch barrel size ensures compatibility with standard TMB telescope focuser systems
• Focal lengths from 2.5mm to 9mm let you adjust magnification to match your telescope's focal length and observing target
• Includes dust covers and rubber eye patch for protection and improved eye comfort during long sessions

Application Scenarios

• Planetary observation with a TMB telescope, where a wide field of view enhances detail visibility on Jupiter or Saturn
• Deep-sky observing of small clusters and planetary nebulae, where a 58-degree field improves framing
• Field astronomy sessions where quick eyepiece swaps are needed between high and low magnification
• Telescope setup and testing where a reliable, consistent eyepiece is needed for calibration
• Educational astronomy demonstrations where a clear, sharp image is required for group viewing

Who It Is For

• Amateur astronomers using TMB telescopes for planetary and deep-sky observation
• Educational institutions teaching astronomy with TMB-based telescope systems
• Observatory teams conducting routine planetary imaging and visual checks
• Hobbyists setting up or upgrading a TMB telescope for improved visual clarity
• Astronomy dealers supplying accessories to end users of TMB telescopes

Problems It Solves

• A narrow field of view limits the ability to frame small deep-sky objects or planetary features
• Poor lens design causes edge distortion or chromatic fringing, reducing image clarity
• Short eye relief makes it difficult to view comfortably, especially for users with glasses
• Lack of dust protection leads to contamination of the optical surface during storage
• Incompatible barrel size prevents use in standard TMB telescope focusers

Technical Features

• Designed for TMB telescopes, specifically for planetary observation
• 1.25 inch barrel diameter for standard focuser compatibility
• Focal lengths: 2.5mm, 3.2mm, 4mm, 4.5mm, 5mm, 6mm, 7mm, 7.5mm, 8mm, 9mm
• 58-degree apparent field of view for wide, immersive viewing
• Six optical lenses to reduce optical aberrations and improve image quality
• 12mm eye relief for comfortable viewing, especially with glasses
• Includes front and rear dust covers to protect the lens surfaces
• Rubber eye patch improves eye seal and reduces light leakage during observation

Specifications

Specifications are taken from the AMADA product data for this item. Confirm critical dimensions with us in writing before ordering.

Comparison With Other Options

Use Guide

• Ensure the telescope focuser is clean and free of debris before inserting the eyepiece
• Insert the eyepiece fully into the focuser until it clicks or seats securely
• Use the rubber eye patch to seal the eye socket and reduce stray light during observation
• Keep the dust covers on when not in use to prevent lens contamination
• Swap between focal lengths based on target size and telescope focal length to achieve optimal magnification