A while back we used a resolution test target (USAF1950 pattern) at TSP to measure telescope resolution. The test target was put up on a nearby hill primarily to assist attendees check their scope collimation, in particular check for astigmatism. Thanks to all those who participated and the results were published in Astronomy Technology Today back in 2014,
I thought I would reproduce in the next three posts the key findings - for discussion!
First the resolution achieved by various apertures and telescope types.
The cluster of refractors that have 'beaten' the Dawes limit were all Taks and APs!
The big aperture dobsonians clearly struggled to get near the limit, hampered by seeing across the ranch to the target. They were all looking at very low elevation and pushing their mirror edge supports to the limit!