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Accessories - Bob's Knobs Collimation Knobs For Celestron 14" SCT F/11 W/ Factory Headless Set-Style Screws

Bob's Knobs Collimation Knobs for Celestron 14" SCT f/11 w/ Factory Headless Set-Style Screws

Bob's Knobs
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Estimated Arrival: Between Dec 06 and Dec 12. *ETA to USA Only

Shipping & Returns: Satisfaction guaranteed 30 day return policy.


We offer knobs for all versions of the Celestron 14” f/11 Schmidt-Cassegrain secondary with Allen collimation screws, or either standard or metric Phillips collimation screws. Select knobs for your telescope from the list below. Please use care to select the correct knobs for your telescope. Each knob set is different and they are not interchangeable. Price is for a complete set of knobs.

Fits: Celestron 14” (36 cm) f/11 SCT versions with factory headless set-style (Allen or slotted) collimation screws


  1. These knobs will also fit the Celestron 14” SCT with “Trifid” Fastar secondary and headless set-style collimation screws. The rotary secondary cover must remain open when knobs are installed. The cover is cosmetic only and will not affect operation of the telescope.
  2. The factory dust cover will fit normally with Bob’s Knobs installed.
  3. Do not adjust the center screw if present; this is the secondary pivot screw.
  4. 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.



Black plastic, 16mm (5/8”) diameter


Stainless steel


We know that once you've placed your order, you are anxious to receive it! We make every effort to get your order shipped out to you as quickly as possible.

As soon as you place your order, you will receive an order confirmation e-mail. This means that we have received your order in our system and pre-authorized your credit card for the purchase. We will process the charges to your credit card and your order will ship within five business days from the date of your order. We will send you tracking information within 24 hours of your order leaving the warehouse to the e-mail address you provided when checking out.  If you do not receive tracking information from us within six business days of your order, feel free to follow up with us at

Standard shipping time in the US is between 3-5 business days, though it can vary slightly depending on the destination. We typically For updates on your shipment you can enter your tracking number here.

We distribute nationwide via UPS and Fedex. Unfortunately, at this time we are not able to provide expedited or international shipping.