Originally posted by pericombobulation Awesome pics Andrew!
I just asked the question because I wasn't sure if there was something about FF which would inherently make the camera's focusing system work better. Some cameras may have AF systems which are better than those of other cameras, but this doesn't have anything to do with the size of the sensor, right?
Having handled a D600 with an 85 and my K-3 with a Tamron 90, I'd say no. But, if you're asking, are much more expensive and powerful AF systems available for purchase on FF , then the answer is yes.
The lens will have a lot to do with the AF as well.
My understanding is that nothing beats the Canon ring motors for speed of AF, but you have to buy a body that can use them.
When it comes to range of options available, FF offers everything from a $1600 D610 or 6D to a 7 thousand D4 of some incarnation. No other system offers that kind of range and upgradeability, letting you start small and cheap,and end up big and expensive without changing format. That's one of the strengths of FF.
You can get more, the question is whether or not you will. Paying more for an FF system and not doing anymore than you would have done with an APS-c system doesn't make a lot of sense. Most of us don't want to pay for potential, we want to pay of actual usage.
APS-c offers everything from a $350 D3200 to a $1200 K-3, so lower both on the bottom end and top end. But once you're topped out your APS-c system, there may be things you want in your upgrade path that are not available on APS-c. Just as there will be things in your upgrade to FF where that system is not as functional as APS-c. It all depends on what you're going for.