adding a dual-speed focus wheel/knob

[RT65CB-SWL]

Hi guys & girls,

I have a Baader Crayford focusser and I would like to know if it is possible to add a 10:1 dual-speed focus wheel/knob? - if "yes!" then where can I buy the wheel/knob from?

Apologies in advance if I have posted this in the wrong section.

[hornedreaper33]

Hey bud, see the other thread I posted on the topic:

We're building up some nice info on there. The mechanism seems to be called a Vernier Reduction Drive, although that name wont yield much on google. Here is an example:

https://www.mainline-group.com/products/4511-6-1-1-4-ball-drive-made-by-jackson-bros-new

Only place I found a 10:1 was at:

http://www.orenelliottproducts.com/purchase-planetary-reduction-drive

Shipping is pretty pricey there though. 6:1 should be more than adequate.

 

Good luck.

[JOC]

The other option is an oversize knob, like the one my bro made me - here is the favourite picture