Bob's knobs for MEADE 12” (30 cm) SCT We offer knobs for all versions of the Meade 12” f/10 and f/8 Schmidt-Cassegrain secondary, including those with three, four, and six secondary screws. (The extra screws on the four- and six-screw versions are for secondary disassembly, not collimation.) Select knobs for your telescope from the list below. Please use care to select the correct knobs for your telescope. Each knob set is different and they are not interchangeable. Price is for a complete set of knobs. _______________________________ A. Knobs for Meade 12” f/10 with 3-Screw or 4-Screw Secondary Part: M12-3Fits: Meade 12” (30 cm) f/10 SCT versions with three screws or four screws on the secondary housing (LX200, ACF f/10, others)Knobs: Black plastic, 16 mm (5/8”) diameterThreads: Stainless steelNotes: The factory dust cover will fit properly with Bob’s Knobs installed. If your secondary housing has a fourth screw on the side, it is for secondary disassembly and is not used for collimation. An Allen wrench for removing the factory collimation screws is included with your order. _______________________________ B. Knobs for Meade 12” f/8 with 6-Screw Secondary Part: M12-6f8Fits: Meade 12” (30 cm) f/8 SCT versions with six screws on the secondary housing (LX600, LX850, ACF f/8 versions)Knobs: Black plastic, 16 mm (5/8”) diameterThreads: Stainless steelNotes: The factory dust cover will fit properly with Bob’s Knobs installed. An Allen wrench for removing the factory collimation screws is included with your order. Installation may require removing the secondary from the OTA. See our technical paper for details.
