Orion ST80 as a guide scope - back focus issue

[mikeyj1]

Hi 

I want to set up my orion ST80 as my guide scope with the Qhy5L-ii, but cannot achieve enough back focus.  Can someone tell me, or post a picture of what sort of spacer or other solution i need and where to get it from,

thanks

Mike

[Skipper Billy]

80mm spacer required or thereabouts..

 

[mikeyj1]

great, thanks David, will look through FLO site for it

 

[Uplooker]

As per Billy, or remove the lens from a cheap Barlow and use the remaining bit in the imaging train - job done.

[mikeyj1]

nice idea Ian, will try that