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Bob's Knobs Bob's Knobs for C9.25 f/10 Secondary with Standard Collimation Screw Threads
Part: C9.25std
Fits: Celestron 9.25” (23.5 cm) f/10 SCT versions with standard collimation screw threads (not for CPC 925 or EdgeHD).
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Bob's Knobs for C9.25 f/10 Secondary with Standard Collimation Screw Threads
$20.00
Bob's Knobs Bob's Knobs for C14 f/11 Secondary with Factory Phillips Collimation Screws with Standard Threads
Part: C14stdphi
Fits: Celestron 14” (36 cm) f/11 SCT versions with factory Phillips collimation screws with standard threads, with or without Fastar.
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Bob's Knobs for C14 f/11 Secondary with Factory Phillips Collimation Screws with Standard Threads
$20.00
Bob's Knobs Bob's Knobs for Meade 8” f/10 with 3-Screw Secondary
Part: M8-3
Fits: Meade 8” (20 cm) f/10 SCT versions with three screws on the secondary housing (2080, LX5, LX10, LX50, LX90, LX100, LX200, others)
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Bob's Knobs for Meade 8” f/10 with 3-Screw Secondary
$20.00
Bob's Knobs Knobs for Zhumell Z8, Z10, and Z12 Secondary
Fits: Zhumell Z8, Z10, and Z12 telescopes
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Knobs for Zhumell Z8, Z10, and Z12 Secondary
$20.95
Bob's Knobs Knobs for SkyWatcher Newtonian Primary with Factory Collimation Screws
Fits: SkyWatcher Newtonian telescopes with factory collimation screws.
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Knobs for SkyWatcher Newtonian Primary with Factory Collimation Screws
$25.95
Bob's Knobs Bob's Knobs for Set Screw Secondary Common Newtonian
Most mass-produced Newtonian telescopes from Celestron, GSO, Hardin Optical, Meade, Orion, Synta, and Zhumell use one of the secondary mirror configurations shown on this page. The photographs and descriptions below will help you determine which knobs to
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Bob's Knobs for Set Screw Secondary Common Newtonian
$20.95
Bob's Knobs Bob's Knobs for Meade 8” f/10 with 4-Screw Secondary
Part: M8-4
Fits: Meade 8” (20 cm) f/10 SCT versions with four screws on the secondary housing (LX90, LX200, others).
Knobs: Black plastic, 13 mm (1/2”) diameter
Threads: Black anodized aluminum alloy
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Bob's Knobs for Meade 8” f/10 with 4-Screw Secondary
$20.00
Bob's Knobs C6BO Celestron 6" SCT f10 Knobs (Black Oxide)
The knobs below will fit almost all versions of the Celestron 6” Schmidt-Cassegrain secondary.
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C6BO Celestron 6" SCT f10 Knobs (Black Oxide)
$24.95
Bob's Knobs CNsec35 Knobs for Newtonian Secondary Set Screw
CNsec35 Knobs for Newtonian Secondary Set Screw
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CNsec35 Knobs for Newtonian Secondary Set Screw
$20.95
Bob's Knobs C9.25metSS C9.25 f/10 (non-Fastar) with Metric Screws (CPC 925) (Stainless Steel)
C9.25metSS C9.25 f/10 (non-Fastar) with Metric Screws (CPC 925) (Stainless Steel)
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C9.25metSS C9.25 f/10 (non-Fastar) with Metric Screws (CPC 925) (Stainless Steel)
$29.95
Bob's Knobs Bob's Knobs for C8 f/10 Secondary with Metric Collimation Screw Threads (not for EdgeHD or Hyperstar)
Part: C8metBO (black oxide steel); C8metSS (stainless steel)
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 SkyWatcher SCT and non-EdgeHD Fastar.
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Bob's Knobs for C8 f/10 Secondary with Metric Collimation Screw Threads (not for EdgeHD or Hyperstar)
$24.95
Bob's Knobs Bob's Knobs for C9.25 f/10 Secondary (non-Fastar) with Metric Collimation Screw Threads
Part: C9.25metBO (black oxide steel); C9.25metSS (stainless steel)
Fits: Celestron 9.25” (23.5 cm) f/10 SCT versions with metric screw threads (CPC 925). Not for C9.25 with “Trifid” Faster or EdgeHD optics (see Item C below).
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Bob's Knobs for C9.25 f/10 Secondary (non-Fastar) with Metric Collimation Screw Threads
$24.95
Bob's Knobs Bob's Knobs for C11 f/10 with Flat Secondary Housing (non-Fastar) and Metric Collimation Screw Threads
Part: C11metBO (black oxide steel); C11metSS (stainless steel)
Fits: Celestron 11” (28 cm) f/10 SCT versions with flat secondary housing and metric collimation screw threads (most CPC 1100).
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Bob's Knobs for C11 f/10 with Flat Secondary Housing (non-Fastar) and Metric Collimation Screw Threads
$29.00
Bob's Knobs Bob's Knobs for C8 f/10 Secondary with Hyperstar and Metric Collimation Screw Threads
Part: C8hypBO (black oxide steel); C8hypSS (stainless steel)
Fits: Celestron 8” (20 cm) f/10 SCT with metric collimation screws and Hyperstar option
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Bob's Knobs for C8 f/10 Secondary with Hyperstar and Metric Collimation Screw Threads
$24.95
Bob's Knobs Bob's Knobs for C8 f/10 Secondary with EdgeHD Optics
Part: C8edgBO (black oxide steel); C8edgSS (stainless steel)
Fits: Celestron 8” (20 cm) f/10 SCT with Fastar secondary and EdgeHD optics.
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Bob's Knobs for C8 f/10 Secondary with EdgeHD Optics
$29.00
Bob's Knobs Bob's Knobs for locking elevation adjustment Losmandy
Bob's Knobs specially designed to make working with the Losmandy mount much easier.
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Bob's Knobs for locking elevation adjustment Losmandy
$20.95
Bob's Knobs Bob's Knobs for Meade 6” f/10 6-Screw Secondary
Part: M6-6
Fits: Meade 6” (15 cm) f/10 SCT versions (ETX-LS, LS-6 SC and ACF, LT-6 SC and ACF)
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Bob's Knobs for Meade 6” f/10 6-Screw Secondary
$29.95
Bob's Knobs KNOBS FOR MEADE 16 inch (41 cm) f/10 SCT WITH 3-SCREW SECONDARY
Knobs for Meade 16” f/10 with 3-Screw Secondary
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KNOBS FOR MEADE 16 inch (41 cm) f/10 SCT WITH 3-SCREW SECONDARY
$29.95
Bob's Knobs Bob's Knobs for C9.25 f/10 Secondary with Metric Collimation Screw Threads and “Trifid” Fastar Housing
Part: C9.25fst
Fits: Celestron 9.25” (23.5 cm) f/10 SCT versions with "Trifid" Fastar secondary housing
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Bob's Knobs for C9.25 f/10 Secondary with Metric Collimation Screw Threads and “Trifid” Fastar Housing
$24.95
Bob's Knobs Bob's Knobs for C8 f/10 Pre-1980 Orange-Tube Secondary
Part: C8org
Fits: Pre-1980 Celestron 8” (20 cm) f/10 SCT with orange optical tube and factory set-style collimation screws.
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Bob's Knobs for C8 f/10 Pre-1980 Orange-Tube Secondary
$24.95
Bob's Knobs Bob's Knobs for C14 f/11 Secondary with Factory Phillips Collimation Screws with Metric Threads
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.
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Bob's Knobs for C14 f/11 Secondary with Factory Phillips Collimation Screws with Metric Threads
$24.95
Bob's Knobs Bob's Knobs for Celestron 11" f/10 SCT with "Trifid" Fastar Housing Standard Silver Screws
Part: C11stdfst
Fits: Celestron 11” (28 cm) f/10 SCT versions (metal or carbon fiber tube) with standard thread factory collimation screws and "Trifid" rotary cover Fastar secondary housing. Factory collimation screws are silver Phillips. These knobs wil
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Bob's Knobs for Celestron 11" f/10 SCT with "Trifid" Fastar Housing Standard Silver Screws
$20.00
Bob's Knobs C6SS Celestron 6" SCT f10 Knobs (Stainless Steel)
The knobs below will fit almost all versions of the Celestron 6” Schmidt-Cassegrain secondary.
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C6SS Celestron 6" SCT f10 Knobs (Stainless Steel)
$29.95
Bob's Knobs Bob's Knobs for attaching equatorial head to upper tripod section
Bob's Knobs specially designed to make working with the Losmandy mount much easier.
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Bob's Knobs for attaching equatorial head to upper tripod section
$29.95