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3D Astronomy 1.25" L-O-A Neutral Eyepiece - 21mm

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Brand 3D Astronomy
Part Number E-3D-NEU21

Product Info

Manufacturer Description

  • 1.25” eyepiece of 21 mm focal length, 65-degree apparent field of view, and generous 18 mm of eye relief for comfortable observing during long sessions. Fully multicoated.


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Apparent Field of View 65°
Barrel Size 1.25" (31.7mm)
Bolt Case Included Yes - Manufacturer Supplied
Bolt Case Size Replacement: Agena 42x60mm
Coatings Fully Multi-Coated
End Caps 2
Eye Relief by Design 18mm
Filter Threads Standard 1.25" Filter Thread (M28.5 x 0.6)
Focal Length 21mm
Lens Elements 5
Lens Groups 3
Rubber Eye Guard Yes
Eyepiece Weight 3.60oz (102.06g)
Blackened Lens Edges Yes
Manufacturer 3D Astronomy
Eyepiece Focal Length 20.1mm - 30mm
Eyepiece Field of View 61 - 70 degrees
Eyepiece Series L-O-A 3D Eyepiece
Barrel Type Smooth sided