Astro-Physics Advanced Convertible Barlow lens, barrel 50.8 mm, designed to match the characteristics of small and medium size CCD chips. It is also ideal for high-power visual observation and lunar-planetary-solar photography.
TeleVue Powermate 5x 31.8mm. The Powermate consists of a negative doublet plus a positive "pupil-correcting" doublet. This 4-element system provides the magnifying function of a Barlow without its limitations by restoring the field rays back to their original direction, as if the Powermate were not there. The result is a pure magnification increase.
These Wide Field Eyepieces (65Th) Are Currently Considered Among The Best On The Market (After The Pentax Xw And Tele Vue), Joining A Field Very Correct Aberrations, Excellent Contrast, Extraction Of Pupil 22 mm At A Very Competitive Price.