Fits: All Meade 12 inch (30 cm) f/5 Lightbridge telescopes. Also fits Zhumell and GSO 12 inch telescopes.
Primary collimation: Black plastic, 30 mm (1-1/4 inch) diameter, 5-point fluted
Primary locking: Black plastic, 25 mm (1 inch) diameter, knurled
Secondary collimation: Black plastic, 13 mm (1/2 inch) diameter, knurled
Threads: Black oxide or zinc plated steel (primary adjustment); stainless steel (primary locking); black oxide or chrome plate (secondary)
Note1: The factory dust cover will fit normally with secondary knobs installed.
Note2: The telescope optical tube assembly will clear the rocker box with primary knobs installed.
Note3: One of the primary mirror knobs may interfere with the cooling fan connector. The plug will fit properly between the knob flutes (photo), so leave this one knob stationary and collimate using the remaining knobs. If desired, you can leave the factory collimation screw that is next to the fan connector in place.
Note4: Primary mirror springs as supplied by the factory can sag from the weight of the mirror cell. Our stainless steel replacement springs are stronger and provide adequate support to maintain primary mirror collimation. We recommend that the mirror locking screws remain in place for additional control.
Note5: Our low-profile azimuth lock knob will not interfere with the OTA as it is moved near the zenith.