Let's agree to disagree shall we. As I said, I have an F5 and compaired it directly to an F6 I was using.
There is the difference: I have them both, both using for years. You have used the F6 only for a short time compared to the F5 use.
It is always the same: Those who are bashing the F6 have
- either used it only a short time
- or have never used it at all.
The F5 was built for pro use, the F6 was built for enthusiastic amateur use as nearly all the F5 people had gone digital by then.
That is internet nonsense. The F6 was designed for professional use. Some of their essential parts have been developed together with the Nikon D2X (or would you also say that the D2X is an amateur camera?).
When the F6 was introduced in 2004 the first who have bought it have been some thousand professional photographers worldwide, especially nature, portrait and wedding photographers.
Got this information from several big camera shops. And it is still used by thousands of professional photographers today (I am one, too, and I know many colleagues who are also using one).
I've no doubt it's a robust camera however it has not had the use and proven track record of heavy use that the F5 has so any ideas of the F6's robustness can only ever be speculation when compaired with the F5.
The F6 is now nine years old, and no problems and malfunctions have been occured so far. But after the same time span we've seen some problems with the F5, e.g. the loosing rubber grip.
Nikon had very intensively looked at the problems of the F5, and improved these points on the F6.
The a/f of the F6 on paper may be improved but with afs lens's I couldn't detect any improvement. With afd's the f5 is king.
I have to disagree on my tests and daily experience. F6 is a bit faster, and significantly more precise. The AF field distribution is a big improvement.
Many complain of the size of an F5 and then add a battery pack to their F6 (which they champion as an improvement on the size of the F5) making it even bigger than an F5!
That is not the point. With the F6 I have the option to choose whether I want to have a light option, or using the vertical grip.
I don't have the option with the F5.
And the ergonomics of the F6 with MB-40 is improved compared to the F5. The much better ergonomics of the F6 is an important factor.