I notice that some of you are guiding the DDM85 mounts, whilst others do not. Has anyone done an in-depth comparison of guided performance vs. MLPT on a well set up system?
My reason for asking is that I have seen claims that stars will always be smaller and sharper with guiding, no matter how good the mount is. I find this hard to understand if the unguided mount is tracking to sub-pixel accuracy over the time of each exposure, which my mobile set-up certainly does - in fact I've measured my DDM60 to track within 0.75 arcsec over an hour.
I would dearly like to be enlightened on this issue.