kevindar Offline Upload & Sell: Off
|
you have expressed a couple of objectives.
1. Faster and better AF
2. More control over dof.
If you stay with your current system, the only option to satisfy both is buying a prime. the simga 18-35 1.8 is notoriously problematic in AF (read dpreview). If you decide to stay with crop, host of options depending on your desired focal lenght, need for IS, etc. there are canon 35 f2 IS, original 35 1.4L (a bargain) 24L, 50, 85, etc.
If you go full frame, you can continue using a zoom. I find a midrange zoom to be most useful, a 24-70. I have several variations of this, but if you want better dof control. you are looking at 2.8. is cost is a concern, the old 28-70 2.8L is excellent, and can be had on the used market for 500 or less, but be ware, that if it breaks, canon wont fix it. I have the tamron vc, as well as the canon 2.8II. both are optically very good. Tamron is not as accurate or fast focusing. Not bad, just not great.
my 2 cents.
|