p.1 #3 · Tamron 28-75 - focus faster with the 1d series?
Fraga is correct. My Tammy hunts on my 1D just as much as it does on the 5D II. But if you're not using it for sports or action, then you'll likely enjoy the use of this lens.
p.1 #4 · Tamron 28-75 - focus faster with the 1d series?
You won't see much of a difference. It's one of the things that sets the Canon L apart - virtually instant focus in at least decent light. Whether it's worth the extra bucks is up to you.
p.1 #5 · Tamron 28-75 - focus faster with the 1d series?
I owned 28-75 for 1 week and tested it on 5D. Its AF is actually pretty fast and I think it's similar to my former canon 50mm 1.4. On top of it, it's pretty accurate too.
Of course when you pair it with 1 series, it'll be even faster.
