Happy Birthday !!

I look forward to seeing the images from this lens.
Maybe I'll replace the 24-70 F2.8 L with this IS lens, maybe not as I like the wider aperture for motorsport

I'm finding that the 100-400 works best at f9 which is too slow for anything except bright sunlight.
Which is I suppose why the wide aperture big glass is so hugely expensive, and used by so many pro sports shooters !
I just don't want to spend 1/3 the price of a new car (or a V12 Jaguar 'E' type) on a lens


Enjoy your new toy ;)