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Part: CNsec25 or CNsec35
Fits: Orion SkyQuest XT-series with factory long Phillips secondary collimation screws. This configuration is not as common as the set-screw secondary.
Secondary Characteristics: 4-vane spider, a deeply recessed center screw, and factory Phillips collimation screws. The secondary plate holding the screws is about 20 mm (3/4”) thick.
Knobs: Black plastic, 13 mm (1/2”) diameter
Threads: Stainless steel