Skip to content
MEGA BLACK FRIDAY DEALS //POST CANADA WON'T BE USED UNTIL STRIKE IS SOLVED / Free Shipping for orders over $500* Some exceptions may apply.
MEGA BLACK FRIDAY DEALS //POST CANADA WON'T BE USED UNTIL STRIKE IS SOLVED / Free Shipping for orders over $500* Some exceptions may

Bob’s Knobs

the bob's knob are renowned in the world of astronomy. They are the best!

Filters

$
$
Bob's Knobs for Celestron 8" SCT - Astronomy Plus
$27.00 - $38.00
$27.00 - $38.00
$27.00 - $38.00
$27.00

Bob's Knobs for Celestron 8" SCT

Bob's Knobs for Celestron 8" SCT A. Knobs for C8 f/10 Pre-1980 Orange-Tube Secondary Part: C8orgFits: Pre-1980 Celestron 8” (20 cm) f/10 SCT with ...

View full details
$27.00 - $38.00
$27.00 - $38.00
$27.00 - $38.00
$27.00
Bob's Knobs for Common Newtonian Secondary - Astronomy Plus
$27.86 - $27.86
$27.86
$27.86 - $27.86
$27.86

Bob's Knobs for Common Newtonian Secondary

Bob's Knobs for Common Newtonian Secondary Fits: Celestron C8-N/NGT, C10-N/NGT, Orion Astrograph, Astroview, SkyQuest XX and XT, Skyview, SkyWatche...

View full details
$27.86 - $27.86
$27.86
$27.86 - $27.86
$27.86
Bob's Knobs for Celestron 5" SCT - Astronomy Plus
$27.00 - $38.00
$27.00 - $38.00
$27.00 - $38.00
$27.00

Bob's Knobs for Celestron 5" SCT

Bob's Knobs for Celestron 5" SCT A. Knobs for C5 f/10 Secondary with Standard Collimation Screw ThreadsPart Part: C5stdFits: Celestron 5” (13 cm) ...

View full details
$27.00 - $38.00
$27.00 - $38.00
$27.00 - $38.00
$27.00
Bob's Knobs for Celestron 6” SCT Black Oxide (C6BO) - Astronomy Plus
$31.00 - $31.00
$31.00
$31.00 - $31.00
$31.00

Bob's Knobs for Celestron 6” SCT Black Oxide (C6BO)

Bob's Knobs for Celestron 6” SCT Black Oxide The knobs below will fit almost all versions of the Celestron 6” Schmidt-Cassegrain secondary. Price i...

View full details
$31.00 - $31.00
$31.00
$31.00 - $31.00
$31.00
Bob's Knobs for Celestron 11" SCT - Astronomy Plus
Bob's Knobs for Celestron 11" SCT - Astronomy Plus
$31.00 - $35.00
$31.00 - $35.00
$31.00 - $35.00
$31.00

Bob's Knobs for Celestron 11" SCT

Bob's Knobs for Celestron 11" SCT We offer knobs for all versions of the Celestron 11” f/10 Schmidt-Cassegrain secondary with either standard or me...

View full details
$31.00 - $35.00
$31.00 - $35.00
$31.00 - $35.00
$31.00
Bob's Knobs for Celestron 9.25” SCT - Astronomy Plus
Bob's Knobs for Celestron 9.25” SCT - Astronomy Plus
$31.00 - $38.00
$31.00 - $38.00
$31.00 - $38.00
$31.00

Bob's Knobs for Celestron 9.25” SCT

Bob's Knobs for Celestron 9.25” SCT  A. Knobs for C9.25 f/10 Secondary with Standard Collimation Screw Threads Part: C9.25stdFits: Celestron 9.25”...

View full details
$31.00 - $38.00
$31.00 - $38.00
$31.00 - $38.00
$31.00
$54.00 - $54.00
$54.00
$54.00 - $54.00
$54.00

Bob's Knobs for MEADE 16” (41 cm) SCT

Bob's Knobs for MEADE 16” (41 cm) SCT We offer knobs for all versions of the Meade 16” f/10 Schmidt-Cassegrain secondary, including those with thre...

View full details
$54.00 - $54.00
$54.00
$54.00 - $54.00
$54.00
$31.00 - $31.00
$31.00
$31.00 - $31.00
$31.00

Bob's Knobs for MEADE 14” (36 cm) SCT

Bob's Knobs for MEADE 14” (36 cm) SCT We offer knobs for the Meade 14” f/10 (Item A) and f/8 (Item B) Schmidt-Cassegrain secondary with exposed col...

View full details
$31.00 - $31.00
$31.00
$31.00 - $31.00
$31.00
$31.00 - $31.00
$31.00
$31.00 - $31.00
$31.00

Bob's knobs for MEADE 12” (30 cm) SCT

Bob's knobs for MEADE 12” (30 cm) SCT We offer knobs for all versions of the Meade 12” f/10 and f/8 Schmidt-Cassegrain secondary, including those w...

View full details
$31.00 - $31.00
$31.00
$31.00 - $31.00
$31.00
$31.00 - $47.00
$31.00 - $47.00
$31.00 - $47.00
$31.00

Bob's Knobs for MEADE 10” (25 cm) SCT

Bob's Knobs for MEADE 10” (25 cm) SCT We offer knobs for all versions of the Meade 10” f/10 and f/6.3 Schmidt-Cassegrain secondary, including those...

View full details
$31.00 - $47.00
$31.00 - $47.00
$31.00 - $47.00
$31.00
$27.00 - $47.00
$27.00 - $47.00
$27.00 - $47.00
$27.00

Bob's Knobs for MEADE 8” (20 cm) SCT

Bob's Knobs for MEADE 8” (20 cm) SCT We offer knobs for all versions of the Meade 8” f/10 and f/6.3 Schmidt-Cassegrain secondary, including those w...

View full details
$27.00 - $47.00
$27.00 - $47.00
$27.00 - $47.00
$27.00
$40.00 - $40.00
$40.00
$40.00 - $40.00
$40.00

Bob's Knobs for Meade 6" SCT

Bob's Knobs for Meade 6" SCT The knobs below will fit all versions of the Meade 6” Schmidt-Cassegrain secondary. Price is for a complete set of kno...

View full details
$40.00 - $40.00
$40.00
$40.00 - $40.00
$40.00
Bob's Knob for Common Newtonian Primary - Astronomy Plus
Bob's Knob for Common Newtonian Primary - Astronomy Plus
$47.00 - $47.00
$47.00
$47.00 - $47.00
$47.00

Bob's Knob for Common Newtonian Primary

Bob's Knob for Common Newtonian Primary Common Newtonian-style telescope primary configurations: These knobs will fit most Newtonian reflectors mad...

View full details
$47.00 - $47.00
$47.00
$47.00 - $47.00
$47.00
Bob's Knobs for Astro-Tech [also GSO, iOptron, MallinCam, Orion, TPO] 8" f/8 Ritchey-Crétien Secondary (AT8RC) - Astronomy Plus
$37.75 - $37.75
$37.75
$37.75 - $37.75
$37.75

Bob's Knobs for Astro-Tech [also GSO, iOptron, MallinCam, Orion, TPO] 8" f/8 Ritchey-Crétien Secondary (AT8RC)

Bob's Knobs for Astro-Tech [also GSO, iOptron, MallinCam, Orion, TPO] 8" f/8 Ritchey-Crétien Secondary Fits: Astro-Tech, GSO, iOptron, MallinCam, O...

View full details
$37.75 - $37.75
$37.75
$37.75 - $37.75
$37.75
Bob's Knobs for Astro-Tech [also GSO, iOptron, MallinCam, Orion, TPO] 6" f/9 Ritchey-Crétien Secondary (AT6RC) - Astronomy Plus
$37.75 - $37.75
$37.75
$37.75 - $37.75
$37.75

Bob's Knobs for Astro-Tech [also GSO, iOptron, MallinCam, Orion, TPO] 6" f/9 Ritchey-Crétien Secondary (AT6RC)

Bob's Knobs for Astro-Tech [also GSO, iOptron, MallinCam, Orion, TPO] 6" f/9 Ritchey-Crétien Secondary Fits: Astro-Tech, GSO, iOptron, MallinCam, O...

View full details
$37.75 - $37.75
$37.75
$37.75 - $37.75
$37.75
Bob’s Knobs for Celestron 14″ SCT (C14metphi) - Astronomy Plus
$31.00 - $31.00
$31.00
$31.00 - $31.00
$31.00

Bob’s Knobs for Celestron 14″ SCT (C14metphi)

Bob’s Knobs for Celestron 14″ SCT Fits: Celestron 14” (36 cm) f/11 SCT versions with factory headless set-style (Allen or slotted) collimation scre...

View full details
$31.00 - $31.00
$31.00
$31.00 - $31.00
$31.00
Bob's Knobs for SkyWatcher & Celestron Newtonian Primary (SWpri) - Astronomy Plus
$34.51 - $34.51
$34.51
$34.51 - $34.51
$34.51

Bob's Knobs for SkyWatcher & Celestron Newtonian Primary (SWpri)

Bob's Knobs for SkyWatcher & Celestron Newtonian Primary Fits: SkyWatcher Newtonian telescopes with factory collimation screws.Primary collima...

View full details
$34.51 - $34.51
$34.51
$34.51 - $34.51
$34.51
Free Shipping

in Canada over 500$+* bf txs

Buy Now, Pay Later

Paybright and Sezzle at Check Out

Target the Right Equipment

Contact us!

Price Match

Find a Better Price? We Will Match it!

Sign Up to Astronomy Plus Newsletters

Subscribe to our Newsletter to be the first to be inform about Promotions, New Products and More!