I am luck enough to live in an area with really dark skies. Unfortunately we also have terrible seeing with the jet stream overhead more often than not. Average seeing is in 2 to 2.5 range and good times are in the 1.3 to 1.6 range.
So we get a lot of squishy stars to guide on. Having changed from a guide scope at 240 mm to using an OAG on my newt at 812 mm I am seeing far more stars that are hard to guide on. just a hot pulsating mess. So the question is does the focal length and magnification of the star on the chip make OAG guiding worthwhile in areas of bad seeing?
Last night for instance was impossible to guide as the stars were so spread out and pulsating there was no discernible centroid.