Here's a few samples, excuse the lack of subject, but I don't have much too look at from the back of the house thats capturable at 400mm

The weather wasn't very nice either..
All focused on the brick rows... No
PP, just converted to jpg and resized.
Spiratone at f/6.3 1/90sec ISO400
Spiratone with matching 2x converter (800mm) f/6.3 1/6sec ISO200 (mighta screwed up on the focus, it's not easy to manual focus at this FL)
For comparison: Sigma APO 400mm f5.6 at F/5.6 1/45sec ISO400
Another comparison: Pentax 55-300mm at 300mm F/5.8 1/125sec ISO400
