SBIG ST7 E
5x300s, autoguided
Pollux 0.8m azimutal mounted telescope
3557mm (=140 inch) f/4.44
12nm H-alpha filter
3-lens Wynne corrector
2.0x2.2 arc seconds
logarithmic scaling
half moon,  very windy
Philipp Keller

We have very seldom wind here at Regensburg, Germany. Unfortunately this was one of the few nights with wind (about 4Bft) and the telescope is fully exposused to the wind since we do not use a dome. Therefore all the stars are elongated in 3 of the 5 exposures. Maximum guiding errors has been 2" due to the wind which is clearly visible in the above image..
We have installed a light shield which is a problem with wind. However I am very satisfied with the fact that the free standing telescope can stand about 3Bft without problems. This will allow to use the telescope in a dome or other enclosure with maybe up to 6 Bft.