CanonRumors has a CR3 article indicating that two of the 4 white primes (300/4 II, 400/2.8 II, 500/4 II and 600/4 II) may be getting Version IIIs at Photokina. That would be pretty interesting. Not sure how they get even better. Only thing I can think of is that the weight gets shaved further. Plus, that would drive down the price of a 600/4 II which I have an eye on, now that the 600 DO seems to be just fantasy. 
http://www.canonrumors.com …es-coming-from-canon-cr3/![]()


