Two Questions About Bob's Knobs

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jrkirkham United States of America
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Two Questions About Bob's Knobs

#1

Post by jrkirkham »


Earlier this year I purchased a new C11. I have it on a CGX mount. I've been seeing the adds for Bob's Knobs and it brought a couple of questions to mind.

1) Do many of you use them? If so have then been helpful? They certainly look useful for an SCT.

2) I read that some C11s have standard threads and some have metric threads. I got the impression that new ones all have metric threads. Does anyone know if that is correct? Is there a way of knowing without taking the adjustment screw out and examining it?
Rob
Telescopes: 50mm refractor, ED80 triplet, 90mm makcass, 10" dob, 8"SCT, 11"SCT
Mounts: Celestron CGX, Orion Sirius + several camera tripods
Cameras: Canon 6D, Canon 80D, ZWO-ASI120MC
Binoculars: 10x50, 12x60, 15x70, 25-125x80
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AL Projects Completed: Lunar #645, Outreach #0280, Universe Sampler #93-T, Binocular Messier #871, Messier #2521, Messier Honorary #2521, Constellation Hunter Northern Skies #112, Planetary Transit Venus #1, Galileo #26, Outreach Stellar 0280, Meteor Regular #157, Solar System Telescopic #209-I, Observer Award #1
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Ylem United States of America
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Re: Two Questions About Bob's Knobs

#2

Post by Ylem »


I would contact Bob's Knobs, they would know which ones will fit.
Then Follow the instructions to a T when installing!

Some folks love them, so do not.
I think it depends on your personality.
If you like fiddling with stuff, even a little OCD, you will love them!
For me, I only collimate every 6 months, so I can live without them.

YMMV :)
Clear Skies,
-Jeff :telescopewink:


Member; ASTRA-NJ



Orion 80ED
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A big box of Plossls
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KathyNS Canada
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Re: Two Questions About Bob's Knobs

#3

Post by KathyNS »


I have them on my Newt. They definitely make collimating more convenient.
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DSO AP: Orion 200mm f/4 Newtonian Astrograph; ATIK 383L+; EFW2 filter wheel; Astrodon Ha,Oiii,LRGB filters; KWIQ/QHY5 guide scope; Planetary AP: Celestron C-11; ZWO ASI120MC; Portable: Celestron C-8 on HEQ5 pro; C-90 on wedge; 20x80 binos; Etc: Canon 350D; Various EPs, etc. Obs: 8' Exploradome; iOptron CEM60 (pier); Helena Observatory (H2O) Astrobin
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JayTee United States of America
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Re: Two Questions About Bob's Knobs

#4

Post by JayTee »


I need to collimate my C11 so infrequently that Bob's knobs are not needed. If it was a Newt and I was tweaking it before every session then yes but it's an SCT and I can go years between collimations. By the way, I own a set and have never installed them. Next time I collimate my scope maybe.

Cheers,
JT
∞ Primary Scopes: #1: Celestron CPC1100 #2: 8" f/7.5 Dob #3: CR150HD f/8 6" frac
∞ AP Scopes: #1: TPO 6" f/9 RC #2: ES 102 f/7 APO #3: ES 80mm f/6 APO
∞ G&G Scopes: #1: Meade 102mm f/7.8 #2: Bresser 102mm f/4.5
∞ Guide Scopes: 70 & 80mm fracs -- The El Cheapo Bros.
∞ Mounts: iOptron CEM70AG, SW EQ6, Celestron AVX, SLT & GT (Alt-Az), Meade DS2000
∞ Cameras: #1: ZWO ASI294MC Pro #2: 662MC #3: 120MC, Canon T3i, Orion SSAG, WYZE Cam3
∞ Binos: 10X50,11X70,15X70, 25X100
∞ EPs: ES 2": 21mm 100° & 30mm 82° Pentax XW: 7, 10, 14, & 20mm 70°

Searching the skies since 1966. "I never met a scope I didn't want to keep."

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Lowjiber
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Re: Two Questions About Bob's Knobs

#5

Post by Lowjiber »


I have them on both of my Newts... Can't live without 'em.:)
John (Urban Astronomer) Apertura AD10 Dob; XLT 150 Dob; XLT 120EQ; Lunt Solar 60 PT/B1200; ES AR102; SW Pro 100ED; 2 SW Pro 80ED's; 90mm Eq; WO Z-61; SW 90mm Virtuso Mak; 2 Orion ST-80's; Quark-C; Cams: Polemaster, ASI120MM-S, ASI174MM & ASI174MM-C
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