I'm ready to purchase either the 100-400mm zoom or 400mm f/5.6 prime. With both Photokina coming up in September and New York's Photo Expo in November I wonder if I should wait. Not to purchase any new replacements for these lenses but I'm thinking any new product introductions would enable Canon to reduce prices on the existing line.
What do you think? Should I wait? If I do, would the cost drop be worth the wait?
I need to know because my wife just gave me the thumbs up on this purchase and I feel like buying now before she comes to her senses!
Thanks all.



