Thanks, wildlifeandmore. I'm surprised that 300 was enough or was that one of those unique opportunities?
BTW what's your feeling relative to the 1.3 crop factor for birding, compared to the 5D2? Also your take on the extra weight with the 1D4 - do you hike much with it?
Definitely lucky to get with 300mm. I keep the 1.4x in my pocket.
I really like 1D IV. IQ is really good and the extra length is always good for wildlife along with the other features (fps,weather sealing,custom options). I have owned the 30,40 and 7D's in the past (with great results) but I find myself appreciating the Mark IV more and more. Took me a long time to work up to. I like wildlife first and landscape next. I had the 7D setup with the long tele and the 5DII with a 70-200, switching out to a 17-40 or 24-105 when needed for a full frame shot.
When hiking I take both. Always setup for both wildlife and landscape in a flash. Yes, its a load! Every now and then I will only take the Mark IV. My back sometimes pays the price, but I like to be prepared. My experience with wildlife happens all too quickly and rely on "luck". I am not an avid hiker. Usually half day adventures as I usually go at it alone. Only been out west a year or so and locals here in Eastern Idaho/Western Wyoming label me a "City Boy". All new and all good!