The Vixen Optics LVW 42 42mm Wide-Angle Eyepiece utilizes low-dispersion lanthanum glass to correct aberrations and present brilliant and crisp views without field curvature, comas, or astigmatism. Its large 2" nose piece and long 42mm focal length produce a wide and spacious 65° apparent field of view with an exceptional 20mm eye relief—making looking through it very enjoyable and highly comfortable with reduced eyestrain. Take in stunning views of the moon, galaxies, or extended nebulae with this LVW 42 eyepiece.