I've got a buddy photographer who's getting one of these in their hands Tuesday (the Nikon mount flavor) - and we're going to run it through the paces. if anyone has any particular tests they'd like to see done, let me know. (keep in mind, this isn't MY personal test - so all wishes may not be granted......but suggestions may give us additional ideas as to how to test this sucker!) Of course - all findings will be posted here first! :^)