Frustrated with blurry planetary details? Our 4mm planetary eyepiece solves three core astronomer pain points: 1) Chromatic aberration distorting Jupiter's weather systems 2) Narrow fields requiring constant scope adjustments 3) Eye fatigue during all-night sessions. The 58° wide view and multi-coated optics deliver crisp Cassini Division visibility while the 15mm relief prevents neck strain. Over 2,300 verified buyers report 42% longer comfortable viewing sessions compared to standard plossls. Includes threaded accessory compatibility for lunar observation upgrades.

Features:
Designed primarily for planetary observation and deep sky objects
Exceptional at nearly reducing lateral color aberration and illumination scatter while retaining excellent sharpness, contrast and definition
Fully multi-coated green lenses for excellent image contrast and illumination transmission
Wide 58 degree field of view, fold-down rubber eyecup
Standard 1.25 fitting diameter to the scope's eyepiece holder
Standard 1.25 inner thread to fit illumination accessories
Comes with lens caps for both ends
Optical length: 4mm
Large eye lens diameter: 21mm
Comfortable long eye relief: 15mm
Net Weight: 160g

Package Includes:
1xSWA 1.25 4MM 58-Degree Planetary Eyepiece