There's pro's/con's on both sides, really when it comes down to it, I find that crop body wide angle lenses are lacking if you want a proper Fast (>F3.5) wide angle zoom FROM Canon. I went with a Tokina F2 14-20mm (just arrived so jury is out, but so far seems clean).
Anyways, the fun part is just making most of what you have rather than getting caught up in the technical mumbo jumbo. At a certain point it's drop the keyboard, grab the camera(s) and out the door. See what you can get and maximize your opportunities to the best of your abilities with what you have. I've gone through periods where I had NO camera, or a cheaper Canon Rebel and just a macro lens to having a New 5d series and L lenses and just about everything in between. It's fun to see how far one can push a system and interesting that a lot of the times we're talking about that last 5-10% of image quality and in the grand scheme, does that REALLY make a difference if we're just posting online?
I believe now it's just a time thing: most either have TIME and little $, or $ and not so much time. It's nearly impossible to find a balance between those two extremes to just go out and take advantage of good light when we can.
Wildlife really comes down to time, patience and $$$ at a certain point, but you'd be very surprised what the 80d can do on that bare lens if you work your way towards getting closer to subjects/learning behaviors, etc.
Terrycanon wrote in post #19250835
Yes, I must admit I've given up using the 1.4 extender on 100-400 and the 5DIV. I've found it slows things down too much - and it makes the combination even heavier. Focusing with it can be hit and miss, too, as you say. I find it also needs good light. I love the 5DIV, but do sometimes miss that extra reach. Ah, well, can't have everything. I'm now trying leaving the 100-400 on the 80D and the macro 100 on the 5D. I'll see how I go. I also like the 24-70 f4 on the 5D. Somehow I think the 24-70 and the 80D never quite liked each other!
Interesting little discussion we're having here, by the way. Thanks.