Skip to content
ZWO EAFN Desktop
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier.
Bob's Knobs for SkyWatcher Newtonian Primary with Factory Collimation Screws

Bob's Knobs for SkyWatcher Newtonian Primary with Factory Collimation Screws

by Bob's Knobs
SKU BOB-SWpri
$0
$28.00 USD - $28.00 USD
$28.00
$28.00 USD - $28.00 USD
$28.00 USD
Price Match Policy!
$28.00
Availability:
Backordered
Contact us to know when we will receive our next ones!

Free Shipping on most orders above $350*

More information

Primary collimation

  • Knobs: Black plastic, 16 mm (5/8”) diameter
  • Threads: Stainless steel

Primary Lock

  • Knobs: Red plastic, 16 mm (5/8”) diameter
  • Threads: Stainless steel

Notes:

  1. Our knobs will fit only a primary with factory collimation screws. If your telescope already has factory collimation knobs (see Item B below) our knobs will not fit.
  2. The telescope optical tube assembly will clear the Dobsonian rocker box with primary knobs installed.
  3. Knobs with shorter screws and spacers replace the factory flathead Phillips collimation screws. Knobs with longer screws replace the factory set-style (grub) locking screws.
  4. Since the factory collimation and locking screws are close together, knobs must be staggered in height. The locking knobs protrude further than the collimation knobs, and they are red in color.
  5. Protect the locking knobs from damage, and do not support the OTA using the locking knobs as feet.

You may also like

  • $25.00 USD - $25.00 USD
    $25.00 USD
    $25.00 USD - $25.00 USD
    $25.00 USD

    Bob's Knobs Collimation Thumbscrews for C11 Metric Fastar - Stainless Steel

    BOB-C11metfst

    The collimation of an SCT can be a daunting task for a beginner, but it is an absolutely necessary process to get the most out of your telescope! D...

    View full details
    $25.00 USD - $25.00 USD
    $25.00 USD
    $25.00 USD - $25.00 USD
    $25.00 USD
  • $28.00 USD - $28.00 USD
    $28.00 USD
    $28.00 USD - $28.00 USD
    $28.00 USD

    Bob's Knobs Collimation Thumbscrews for C14 Metric Phillips

    BOB-C14metphi
    2 in stock

    The collimation of an SCT can be a daunting task for a beginner, but it is an absolutely necessary process to get the most out of your telescope! D...

    View full details
    $28.00 USD - $28.00 USD
    $28.00 USD
    $28.00 USD - $28.00 USD
    $28.00 USD
  • $28.00 USD - $28.00 USD
    $28.00 USD
    $28.00 USD - $28.00 USD
    $28.00 USD

    Bob's Knobs for C5 SCT Metric - Stainless Steel

    BOB-C5metSS

    The collimation of an SCT can be a daunting task for a beginner, but it is an absolutely necessary process to get the most out of your telescope! D...

    View full details
    $28.00 USD - $28.00 USD
    $28.00 USD
    $28.00 USD - $28.00 USD
    $28.00 USD
  • $25.00 USD - $25.00 USD
    $25.00 USD
    $25.00 USD - $25.00 USD
    $25.00 USD

    Bob's Knobs Collimation Thumbscrews for C9.25 Fastar - Stainless Steel

    BOB-C9.25fst
    3 in stock

    The collimation of an SCT can be a daunting task for a beginner, but it is an absolutely necessary process to get the most out of your telescope! D...

    View full details
    $25.00 USD - $25.00 USD
    $25.00 USD
    $25.00 USD - $25.00 USD
    $25.00 USD
  • $28.00 USD - $28.00 USD
    $28.00 USD
    $28.00 USD - $28.00 USD
    $28.00 USD

    Bob's Knobs for C6 SCT - Stainless Steel

    BOB-C6SS

    The collimation of an SCT can be a daunting task for a beginner, but it is an absolutely necessary process to get the most out of your telescope! D...

    View full details
    $28.00 USD - $28.00 USD
    $28.00 USD
    $28.00 USD - $28.00 USD
    $28.00 USD

modal overlay

modal overlay

Wishlist
wishlist emptyYou didn't like any products yet!Explore store