Bob's Knobs for SkyWatcher 5", 6", 8" & 10" Newtonian Primary
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Collimate your Catadioptric or Newtonian reflector style telescopes without tools!
It's easy...just grab a Bob's Knob collimation thumbscrew and turn. You can even do it while looking through the eyepiece on most scopes. These thumbscrews are also much easier to use with gloves on. And perhaps most importantly, you'll never drop that pesky little Allen wrench or screwdriver into the grass again. Installation is a snap with the included instructions, and you can undo the modification at any time.
Part: SWpri
Fits: SkyWatcher (5", 6", 8", 10") Newtonian telescopes with factory collimation screws (not knobs).
Primary collimation
Knobs: Black plastic, 16 mm (5/8") diameter
Threads: Stainless steel
Primary Lock
Knobs: Red plastic, 16 mm (5/8") diameter
Threads: Stainless steel
Notes:
1. These knobs will fit only a primary with factory collimation screws. If your telescope already has factory collimation knobs these knobs will NOT fit.
2. The telescope optical tube assembly will clear the Dobsonian rocker box with primary knobs installed.
3. Knobs with shorter screws and spacers replace the factory flathead Phillips collimation screws. Knobs with longer screws replace the factory set-style (grub) locking screws.
4. Since the factory collimation and locking screws are close together, knobs must be staggered in height. The locking knobs protrude further than the collimation knobs.
5. Protect the locking knobs from damage, and do not support the OTA using the locking knobs as feet.
Other Information
- Country of Manufacture: United States
Collimate your Catadioptric or Newtonian reflector style telescopes without tools!
It's easy...just grab a Bob's Knob collimation thumbscrew and turn. You can even do it while looking through the eyepiece on most scopes. These thumbscrews are also much easier to use with gloves on. And perhaps most importantly, you'll never drop that pesky little Allen wrench or screwdriver into the grass again. Installation is a snap with the included instructions, and you can undo the modification at any time.
Part: SWpri
Fits: SkyWatcher (5", 6", 8", 10") Newtonian telescopes with factory collimation screws (not knobs).
Primary collimation
Knobs: Black plastic, 16 mm (5/8") diameter
Threads: Stainless steel
Primary Lock
Knobs: Red plastic, 16 mm (5/8") diameter
Threads: Stainless steel
Notes:
1. These knobs will fit only a primary with factory collimation screws. If your telescope already has factory collimation knobs these knobs will NOT fit.
2. The telescope optical tube assembly will clear the Dobsonian rocker box with primary knobs installed.
3. Knobs with shorter screws and spacers replace the factory flathead Phillips collimation screws. Knobs with longer screws replace the factory set-style (grub) locking screws.
4. Since the factory collimation and locking screws are close together, knobs must be staggered in height. The locking knobs protrude further than the collimation knobs.
5. Protect the locking knobs from damage, and do not support the OTA using the locking knobs as feet.
Collimate your Catadioptric or Newtonian reflector style telescopes without tools!
It's easy...just grab a Bob's Knob collimation thumbscrew and turn. You can even do it while looking through the eyepiece on most scopes. These thumbscrews are also much easier to use with gloves on. And perhaps most importantly, you'll never drop that pesky little Allen wrench or screwdriver into the grass again. Installation is a snap with the included instructions, and you can undo the modification at any time.
Part: SWpri
Fits: SkyWatcher (5", 6", 8", 10") Newtonian telescopes with factory collimation screws (not knobs).
Primary collimation
Knobs: Black plastic, 16 mm (5/8") diameter
Threads: Stainless steel
Primary Lock
Knobs: Red plastic, 16 mm (5/8") diameter
Threads: Stainless steel
Notes:
1. These knobs will fit only a primary with factory collimation screws. If your telescope already has factory collimation knobs these knobs will NOT fit.
2. The telescope optical tube assembly will clear the Dobsonian rocker box with primary knobs installed.
3. Knobs with shorter screws and spacers replace the factory flathead Phillips collimation screws. Knobs with longer screws replace the factory set-style (grub) locking screws.
4. Since the factory collimation and locking screws are close together, knobs must be staggered in height. The locking knobs protrude further than the collimation knobs.
5. Protect the locking knobs from damage, and do not support the OTA using the locking knobs as feet.
Other Information
- Country of Manufacture: United States
Bob's Knobs for SkyWatcher 5", 6", 8" & 10" Newtonian Primary