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Until May 2nd, 2025, orders under US$800 will not incur any duties or taxes upon delivery. Please note that orders under US$800 crossing the Canada-USA border after this date will be subject to duties. They will be billed by the carrier, and you will be responsible to pay them. Prioritize ordering items that are in stock!
Until May 2nd, 2025, orders under US$800 will not incur any duties or taxes upon delivery. Please note that orders under US$800 crossing the Canada-USA border after this date will be subject to duties. They will be billed by the carrier, and you will be responsible to pay them. Prioritize ordering items that are in stock!

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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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  • Original price $25.00 USD - Original price $25.00 USD
    Original price
    $25.00 USD
    $25.00 USD - $25.00 USD
    Current price $25.00 USD

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

    BOB-C11metfst
    1 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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    Original price $25.00 USD - Original price $25.00 USD
    Original price
    $25.00 USD
    $25.00 USD - $25.00 USD
    Current price $25.00 USD
  • Original price $28.00 USD - Original price $28.00 USD
    Original price
    $28.00 USD
    $28.00 USD - $28.00 USD
    Current price $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...

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    Original price $28.00 USD - Original price $28.00 USD
    Original price
    $28.00 USD
    $28.00 USD - $28.00 USD
    Current price $28.00 USD
  • Original price $28.00 USD - Original price $28.00 USD
    Original price
    $28.00 USD
    $28.00 USD - $28.00 USD
    Current price $28.00 USD

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

    BOB-C8edgSS
    6 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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    Original price $28.00 USD - Original price $28.00 USD
    Original price
    $28.00 USD
    $28.00 USD - $28.00 USD
    Current price $28.00 USD
  • Original price $25.00 USD - Original price $25.00 USD
    Original price
    $25.00 USD
    $25.00 USD - $25.00 USD
    Current price $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...

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    Original price $25.00 USD - Original price $25.00 USD
    Original price
    $25.00 USD
    $25.00 USD - $25.00 USD
    Current price $25.00 USD
  • Original price $28.00 USD - Original price $28.00 USD
    Original price
    $28.00 USD
    $28.00 USD - $28.00 USD
    Current price $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...

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    Original price $28.00 USD - Original price $28.00 USD
    Original price
    $28.00 USD
    $28.00 USD - $28.00 USD
    Current price $28.00 USD
  • Original price $28.00 USD - Original price $28.00 USD
    Original price
    $28.00 USD
    $28.00 USD - $28.00 USD
    Current price $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...

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    Original price $28.00 USD - Original price $28.00 USD
    Original price
    $28.00 USD
    $28.00 USD - $28.00 USD
    Current price $28.00 USD
  • Original price $28.00 USD - Original price $28.00 USD
    Original price
    $28.00 USD
    $28.00 USD - $28.00 USD
    Current price $28.00 USD

    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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    Original price $28.00 USD - Original price $28.00 USD
    Original price
    $28.00 USD
    $28.00 USD - $28.00 USD
    Current price $28.00 USD
  • Original price $25.00 USD - Original price $25.00 USD
    Original price
    $25.00 USD
    $25.00 USD - $25.00 USD
    Current price $25.00 USD

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

    BOB-CNsec30
    1 in stock

    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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    Original price $25.00 USD - Original price $25.00 USD
    Original price
    $25.00 USD
    $25.00 USD - $25.00 USD
    Current price $25.00 USD
  • Original price $28.00 USD - Original price $28.00 USD
    Original price
    $28.00 USD
    $28.00 USD - $28.00 USD
    Current price $28.00 USD

    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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    Original price $28.00 USD - Original price $28.00 USD
    Original price
    $28.00 USD
    $28.00 USD - $28.00 USD
    Current price $28.00 USD