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I used to get exceptional seeing at my house at Killarney Vale on the Southern edge of Tuggerah Lake looking to the north across the lake, from time to time. The temperature of large bodies of water is very stable over short time periods which can lead to excellent seeing conditions above them at times. The best I have done is 1050X in my 18" Obsession (5mm Pentax XW 2.5X Powermate) I have achieved this on about 4 occasions between 2006 and 2010. I was able to use 750X (7mm Pentax XW 2.5X Powermate) on average 2 or 3 times per year. The normal upper limit there was between 250X and 300X. I was also able to run my 14" SDM to 800X (5mm Pentax XW 2.5X Powermate) from this location on about 5 or 6 occasions. Targets observed were Mars, Saturn, the Moon and Sirius.
Unfortunately my local seeing conditions in Kiama due to the close proximity of the escarpment to the coast are usually very poor and I jump for joy if I can get over 300X on anything in any of my 3 telescopes.
Cheers,
John B
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