[Crushellon (Tim)]

I've got my new starlight xpress filter wheel arriving tomorrow and I'll probably have to make some spacers to attach it to the 0.85x on the ed80. Just wondering with the 55mm that is required to the chip on the ccd, is that from the base of the thread on the reducer or from the top of the thread. I assume it is from the base of the thread but I'm just checking before I go turning down one of my spacers.

Tim