Bobs Knobs Collimation Knobs for Orion SkyQuest XT - 25mm

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Bobs Knobs Collimation Knobs for Orion SkyQuest XT - 25mm

Knobs for Orion's SkyQuest XT-Series (6", 8", 10", 12",  and 16") 4-Vane Phillips Screw Secondary - 25 mm Long.

Fits: Orion SkyQuest XT-series with factory 25 mm 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

  1. The factory collimation screw length, measured below the head, can be either 25 mm or 32 to 35 mm long. Order knobs with the correct screw length for your application.