I am also struggling to see what the difference is between the MKII and MKIII that justifies the price.
I had an email from Jessops a couple of weeks ago announcing the new MKIII and had a look at the description and features - http://www.jessops.com/online.store/products/84404/show.html . It looks good but is it good enough to justify me upgrading from my MKII?
Canon EOS 5D Mark III
Threaded Mode