Olaf - thats a good point - the original image on Flickr appears to be the preview from a RAF file (13 MP jpeg/Normal quality) rather than an original full size jpeg in FINE quality - still shouldn't be as blurry as this example
Can you can put the cameras on a tripod and take similar shots again? This should reduce any camera shake.
Also, does your local camera store rent lenses?
The exif data say these were taken pretty close to the same time, but the view in the window shows whomever is doing the landscaping moves really, really quickly.😀