Bob's Knobs voor Celestron 9,25 inch (23,5 cm) F/10 SCT met metrische zilveren Philips collimatieschroeven (CPC 925 modellen) .
Bob's Knobs - Celestron 9,25 inch (23,5 cm) F/10 SCT metrisch:
- Set van drie Bob's Knobs collimatieschroeven;
- Knoppen: zwart staal, 12 mm (1/2 inch) diameter;
- Schroefdraad: zwart staal.
The factory dust cover will fit normally with Bob's Knobs installed.
The CPC 925 SCT requires knobs with metric threads. The CPC 925 secondary can be identified by 1) a factory-installed plastic cover over the collimation screws; 2) black Phillips factory collimation screws; and 3) brand information on the inside of the housing. The secondary housing cover will still fit when Bob's Knobs are installed, but can be left off if desired. The cover is cosmetic only and will not affect operation of the scope.
Celestron 9.25 inch SCTs manufactured prior to 2006 have standard 6-32 collimation screws and require knobs with standard threads. These telescopes can be identified by 1) no writing inside the secondary housing (except for the serial number); and 2) most have silver factory collimation screws. Do not use metric knobs on these telescopes.
A few non-CPC 9.25 inch scopes manufactured in 2006 have black Phillips factory collimation screws that aren't metric. These require knobs with standard threads.