Founder Optics 106 mm f/6 Triplet ED APO Refractor Package - FOT106 70 mm Refractor twist the lock-knob and move

twist the lock-knob and move the center column to the desired height

Focal Length (mm): 3910 mm (154 in)

Unlike other UHC designs

the system incorporates additional neutral density filters to manage the intense reflected energy

Founder Optics 106 mm f/6 Triplet ED APO Refractor Package - FOT106 70 mm Refractor twist the lock-knob and moveThis beautiful 106 mm mm f 6 ED APO Triplet Refractor by Founder Optics includes not one but two ED APO lenses for amazingly sharp and clear images! One of the lenses is made with FPL53 glass and the other is designed with FPL51 glass. A third lens is made of Lanthanum! The lenses are widely spaced, unlike many APO triplets on the market today, giving it a much sought after designation of Super Triplet, or FST, for Fully Separated Triplet. The optics