62° Series 40mm Waterproof Eyepiece saddle-plates The longest focal length in

The longest focal length in the 52° Series with the longest eye relief

place it in the desired slot

two-lens ED refractors or even achromatic lenses

The narrow bandpass for the wavelengths of O-III and H-alpha and the almost complete attenuation of the interfering light sources do not require very large or extremely expensive telescopes

62° Series 40mm Waterproof Eyepiece saddle-plates The longest focal length inExplore Scientific Waterproof Eyepieces Comfort, Quality, Value. The Explore Scientific 62 Series eyepieces are excellent flat field multi element oculars that can transform your visual astronomy experience. With an apparent field of view of 62 degrees and near parfocal design, these eyepieces offer incredible value in a very nice eyepiece. Another great benefit of these eyepieces is the excellent contrast and ease with which you can gaze, not