Took the data for this before the heat wave hit Melbourne.
Large image 2.7MB
http://members.optusnet.com.au/~trlee8/lamcent.jpg
Details. Canon 5DH, Canon 300mm F2.8 at f/2.8. Hutech LPR filter. I used the 1250mm MAK to guide the EQ6 at the same sort of accuracy as I use for the SN10.
Details of exposures. 10x( 15s,30s,1min,2min,2x4min ) at 800ISO. From the different exposure sets produced a tone mapped image with EasyHDR.
Bert