Hi,
I'm planning to make some of my eyepieces parfocal using some rings I have ordered. I mainly want to make two cheaper plossis that have parfocal with my Toucam , and my Canon DSLR - so I can use them to get a rough close focus then slip in the camera.
I may also make my Baader 17 and 21 parfocal.
It seems a relatively straightforward process, but is there any reason it can;t be done in daylight with some close objects (the car number plat 100 metres up the street) for example - or even books on a shelf 10 metres away. intuitiin tells me that if the eyepieces are made parfocal then, they should be parfcoal at infinity as well, but I am learning intuition doesn't always hold sway with telescopes!
Thanks Chris