GPS O-1 with telescope
If a person had the proper adapter to mount a Pentax camera to a telescope that didn't have tracking functionality, would the GPS O-1 unit provide similar functionality as it does when just being used with body and lens alone?
In other words, does it work with a telescope?
The O-GPS-1 unit is able to tracking the stars a few dozen of seconds with a tele lens.
I played with this unit and my DA*200 (see here
With the 200mm lens the K5/gps was able to track the stars up to 1 minute. I performed some tests with a 300mm and I don't expect good results beyond 45s.
You have to be aware of that if you plan to use it with a telescope. I guess 500mm is roughly the minimal focal lengh of telescopes, so don't expect good results beyond 20-25s.