Bobs Knobs - KNOBS FOR MEADE 8 inch (20 cm) f/6 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 8 inch (20 cm) f/6 Lightbridge telescopes. Also
fits Zhumell and GSO 8 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: 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.