The V1 can be used in a pinch on an overcast day shooting at F6.3 without losing the aesthetics of the picture but will lose some detail if you reduce the noise to the degree I did here; I may have gone more than I needed on the noise refuction because all the shots are cropped and enlarged. Speeds shot were from 1/400 to 1/800th of a second with no VR.
These were shot with a Tammy zoom which is very sharp on my aps-c cameras @ 500mm, but I will also post some shots with several Nikon lenses @ 500mm later on so we can see if there is much of a difference. The Tammy 200-500mm is manual focus only using the FT-1.
Below are jpgs which will load faster for you, click on the first one to start the slide show, if you click options, you can download the 1800 pix images, or just enlarge it to view @ 1800 pix.