Bob's Knobs for C14 f/11 Secondary with Factory Phillips Collimation Screws with Metric Threads

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About this product

Bob's Knobs are the BEST option for tool-free collimation.

Simple to fit and easy to use.

Collimate your telescope without an Allen key or screwdriver!

Instructions are supplied but can also be found online as well as useful FAQ.

Images are representative and may not show the exact knob size / threads.

IMPORTANT: Please ensure the Bob's knobs threads and factory screw threads match before installation.

Knobs for C8 f/10 Secondary with Metric Collimation Screw Threads (not for EdgeHD or Hyperstar)

Part: C14metphi
Fits: Celestron 14” (36 cm) f/11 SCT versions with metric thread factory Phillips collimation screws with Fastar and with or without EdgeHD optics.

Knobs: Black plastic, 15 mm (5/8”) diameter
Threads: Black oxide steel

Notes:

1. See the special note below for information on standard and metric threads.

2. Collimation screws on these telescopes are small with very fine threads. Knobs must be tightened gently (just enough to hold the secondary in place) to prevent damage to either the knob or secondary assembly.

3. The factory dust cover will fit normally with Bob's Knobs installed.

4. If your telescope has a rotary secondary cover, it must remain open when knobs are installed. The cover is cosmetic only and will not affect operation of the telescope.

5. Our knobs cannot protrude above the Trifid-style rotary cover or they will interfere with the factory dust cover. For better knob access, you can peel off the vinyl escutcheon and remove this cover or simply access the knobs partly from the side.

Special Note: The Celestron 14” SCT uses either standard 6-32 or metric M3 collimation screws. Headless set-style and silver Phillips factory collimation screws have standard threads. Generally black Phillips collimation screws have metric threads but a few have standard threads. If you order knobs with the wrong screws, contact us using the link at the bottom of this page for return instructions.

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