I'm gunna stand up and beat my chest and say yes, I am 100% confident with the SB800. In all honestly, I believe many people who bought the SB800 could have gone for the cheaper SB600 and would not be missing any of the extra features. I bought the 800 specifically to work on an FM all manual camera, and needed the extra flash
modes aside from iTTL and full manual. So I was reading up on these other
modes and learnt how they worked well before I got took ownership of the flash unit.
However, having tried it out on Birddog's D2H - I can now see where the D70 becomes the limiting factor in flash photography!
iTTL is far from foolproof. It works wonderfully in conjunction with the matrix meter in the D70 for daytime fill, however for night time use it can be inconsistent shot to shot. This is due to several factors -
1) under EV5, the matrix meter deliberately underexposes backgrounds, assuming flash illumination of foreground subject. If there is no foreground subject, or it's not where the dumb meter expects, you end up with overall scene underexposure.
2) you cannot focus and recompose flash pics as you would in daylight, as the TTL and flash metering is linked to the current autofocus point in use. If the AF point after recomposing is pointed at the horizon, you will end up with severe overexposure of your intended subject. The fix to this is to use FV lock, ie. firing the metering preflash with the subject overlaying the current AF point, and then recomposing for the shot. This is why I believe the D70 is the weak point in flash photography - on the D70, you have to program the AE-L/AF-L button to FV lock. Thereby missing out on the other custom functions of this allmighty button. On the D2H, there are two customisable buttons near the lens mount (aka where the D70 has its electronic depth of field preview button), and one can serve as the flash value lock which keeps the rear AE-L button free for other duties.
Anyway, to achieve consistent flash exposures in a sequence of continuous shoots, use A (non-TTL auto) or
AA (auto aperture) flash
modes. Both these
modes may not be present when mounted on your camera - which one depends on what you selected in the flash menu, to appear when you switch
modes (ie. the: TTL-BL -> TTL -> A (or
AA) -> GN -> M -> RPT sequence).