View Full Version here: : Paracorr outward focus with camera

14-11-2017, 07:32 PM
I've got an older paracorr on the way that I intend to use with my ASI 1600. It's the PLA version with no tunable top.

I note that TeleVue state that the 15% barlow effect was added so as to push focus outward. I've looked up a lot of threads but they're all targeted at visual users with the tunable top.

So my question: Does anyone know how much further out the paracorr will push the focal plane? Just trying to determine whether I need to move my primary further down the tube. I can easily move the mirror down 30 or 60mm, just need to know whether it's necessary.