Bobs Knobs - KNOBS FOR MEADE 12 inch (30 cm) f/5 LIGHTBRIDGE

Primary & Secondary

COLLIMATE YOUR SCHMIDT-CASSEGRAIN STYLE OR NEWTONIAN STYLE TELESCOPE
WITHOUT TOOLS

It′s easy . . . just grab a Bob′s Knob and turn. You can
even do it while looking through the eyepiece on most scopes. And
you′ll never drop that pesky little Allen wrench or screwdriver
into the grass again. Installation is a snap with the included
instructions, and you can undo the modification at any time.

Fits: All Meade 12 inch (30 cm) f/5 Lightbridge telescopes. Also
fits Zhumell and GSO 12 inch telescopes.

Knobs:
  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.