Bobs Knobs - KNOBS FOR CELESTRON 11 inch (28 cm) f/10 SCT WITH "TRIFID" FASTARª SECONDARY HOUSING

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 Celestron 11 inch (28 cm) f/10 SCT versions (metal or carbon fiber tube) with
″Trifid″ rotary cover Fastar secondary housing. These will also fit the C11 with
Starizona Hyperstar.

Knobs: Black plastic, 16 mm (5/8 inch) diameter

Threads: Black anodized aluminum alloy

Note1: The factory dust cover will fit normally with Bob′s Knobs installed.

Note2: Many Celestron 11 inch (28 cm) carbon fiber tube and metal tube SCTs manufactured
from 2000 to 2005 have the Trifid rotary cover Fastar secondary housing. Do not use knobs for the
Trifid Faster secondary on the flat secondary. The screws on these knobs are either too long or
have the wrong threads.

Note3: The rotary secondary cover must remain open when knobs are installed. The cover is
cosmetic only and will not affect operation of the telescope.