telescope eyepiece Abbe Ortho Eyepieces, with best price including F24, F16.8, ... .5, F7.7, F4.8 ideal for planetary observing The telescope eyepiece design is superior to the Plossl for lunar and planetary ... sharp, clear image. Available in 4.8mm, 7.7mm, 10.5mm, 16.8mm, and 24mm.