Re: [Utah-astronomy] Thank you on Ealing upgrades and repairs

Last night was a good example of the seeing determining maximum usable aperture. I noticed that the 100mm refractor was showing a more crisp view of Saturn than the Bogdan (and other scopes with twice the aperture), even though it was appreciably dimmer in the smaller scope. On 5/16/10, Canopus56 <canopus56@yahoo.com> wrote:

One general public visitor commented that he did not understand why the 16 inch Ealing had such a better image than the larger Grim scope. But I suspect that, as a glasses wearer, he was able to get the Ealing into proper focus with the fine focusing knob but could not do so with the Grim.