I see nothing wrong with these technically on my monitor. So this is effectively 600+ telephoto (900?)! What tripod setup did you use?
Run! Don't walk! to buy this!
For academic interest, herewith is presented a shot with *ist-D at ISO 200, FA* 300mm/4.5 plus Pentax A-2X-S. The really curious may contact me off list and I can provide the original jpeg.
Thanks,
John