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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, except for the Lacerta upgrade kit, for which we collect them at checkout.
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, except for the Lacerta upgrade kit, for which we collect them at checkout.
Bob's Knobs

Bob's Knobs

Upgrade your telescope with Bob's Knobs precision thumbscrews. Easily adjust collimation and alignment for sharper, clearer views of the night sky.

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$25.00 - $25.00
$25.00
$25.00 - $25.00
$25.00

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...

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$25.00 - $25.00
$25.00
$25.00 - $25.00
$25.00
$28.00 - $28.00
$28.00
$28.00 - $28.00
$28.00

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...

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$28.00 - $28.00
$28.00
$28.00 - $28.00
$28.00
$28.00 - $28.00
$28.00
$28.00 - $28.00
$28.00

Bob's Knobs Collimation Thumbscrews for C8 EdgeHD - Stainless Steel

BOB-C8edgSS
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...

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$28.00 - $28.00
$28.00
$28.00 - $28.00
$28.00
$25.00 - $25.00
$25.00
$25.00 - $25.00
$25.00

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

BOB-C9.25fst

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...

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$25.00 - $25.00
$25.00
$25.00 - $25.00
$25.00
$28.00 - $28.00
$28.00
$28.00 - $28.00
$28.00

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...

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$28.00 - $28.00
$28.00
$28.00 - $28.00
$28.00
$28.00 - $28.00
$28.00
$28.00 - $28.00
$28.00

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...

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$28.00 - $28.00
$28.00
$28.00 - $28.00
$28.00
$28.00 - $28.00
$28.00
$28.00 - $28.00
$28.00

Bob's Knobs for C8 SCT - Stainless Steel

BOB-C8metSS

Fits: Most Celestron 8” (20 cm) f/10 SCT made in 2005 and later with black Phillips factory collimation screws that have metric threads. Includes S...

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$28.00 - $28.00
$28.00
$28.00 - $28.00
$28.00
$25.00 - $25.00
$25.00
$25.00 - $25.00
$25.00

Bob's Knobs for Celestron C6-N/NGT, C8-N/NGT and C10-N/NGT Secondary - 30mm

BOB-CNsec30

Part:CNsec30 or CNsec35Fits: Celestron C6-N/NGT, C8-N/NGT, and C10-N/NGT Newtonian telescopes, SkyWatcher (5”, 6”, 8”, 10”, 12”, 14”, 16”) Newtonia...

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$25.00 - $25.00
$25.00
$25.00 - $25.00
$25.00
$28.00 - $28.00
$28.00
$28.00 - $28.00
$28.00

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

BOB-SWpri

Primary collimation Knobs: Black plastic, 16 mm (5/8”) diameter Threads: Stainless steel Primary Lock Knobs: Red plastic, 16 mm (5/8”) diamete...

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$28.00 - $28.00
$28.00
$28.00 - $28.00
$28.00