GSO 25 mm Plossl Eyepiece
Quick Overview
1.25" 25mm Plössl Eyepiece with a wide 52° apparent field of view
Fully multi-coated 4-element optical design with blackened lens edges
Generous 22mm eye relief and fold-down rubber eyeguard for comfort
Threaded for use with standard 1.25" astronomical filters
Weight: 3.6 oz | Made in Taiwan
Product Description
The GSO 25mm Super-Plössl Eyepiece is a superb tool for wide-field sky scanning and deep-space exploration. Whether you're admiring sweeping views of open star clusters or diving into the structure of extended galaxies, this eyepiece delivers exceptional clarity without compromising on comfort or value.
Featuring a 4-element design with fully multi-coated lenses, it offers excellent light transmission and sharp images across the field. The blackened lens edges reduce internal reflections for improved contrast, while the generous 22mm of eye relief makes viewing easy—even for eyeglass wearers.
Key Features ⯆
➤ Fully Multi-Coated (FMC) optics for crisp, bright views
➤ Four-element lens system ensures clarity across the entire field
➤ Blackened lens edges to enhance contrast and reduce scatter
➤ Long 22mm eye relief ideal for relaxed, extended viewing
➤ Fold-down rubber eyeguard blocks stray light
➤ Standard 1.25" filter thread supports all common astronomy filters
➤ Comes with two protective end caps for safe storage
Technical Specification 
Specification |
Details |
Eyepiece Series |
Super-Plossl |
Focal Length |
25mm |
Barrel Size |
1.25" (31.7mm) |
Apparent Field of View (Mfg Specified) |
52° |
Eye Relief (Designed) |
22mm |
Filter Threads |
Standard 1.25" Filter Thread (M28.5 x 0.6) |
Coatings |
Fully Multi-Coated |
Lens Elements |
4 |
Blackened Lens Edges |
Yes |
Barrel Type |
Smooth sided |
Protective Plastic Storage Container |
Yes - Free Agena Eyepiece Container |
Protective Plastic Storage Container Size |
Agena 42x80mm |
Optical Design |
Plossl |
Height (With Eyeguard Extended) |
73mm |
End Caps |
2 |
Rubber Eye Guard |
Yes |
Weight |
3.6 oz |