Like everyone else with a D300(s) I have been waiting too long for something, anything, from Nikon to excite my imagination and pry open my wallet.
I have, finally, developed more coordination in tracking birds and aircraft than my D300 will cope with. I have tried every combination of focus settings available and still have entire bursts where the subject is constantly within the cross-type sensor area but the camera won't lock on at 6fps, even against a clear blue sky.
I don't think the 300mm f/4 AFS is the problem since when the camera finally finds the target the lens response is instant and tack sharp.
I only get consistent results by tracking for several seconds with the AF-ON button until the camera kicks in, then firing at a maximum of 4fps. Grabbing a fast bird in mid-flight for an instant grab shot seldom works.
My request? A D4 brain and frame rate inside a D300 calibre body with a 24mp DX sensor. Since I don't have many DX lenses I would even go for an FX camera if I could get the tracking and frame rates I want with something close to my current pixel density in a camera weighing under 1kg (35oz).
Indoors for rehearsals at classical music concerts I need an unobtrusive, genuinely quiet camera with grainless ISO 6,400 and a good set of fast wide to normal primes. Neither of my requirements are met by the D300 nor anything else in Nikon's current lineup.
With no D400 or serious mirrorless in sight I will go with a Fuji X-E1 for indoors.
Outdoors? Who knows? An 8fps D800 would do me nicely I suspect. Any rumors of that?