BJ, are you sure. I was under the impression from the Nikon Rep that was in my store this week talking about it that it could do that all the time no matter what you were using. But I was quite busy while he was in and could not talk to him more about it before he left.
John R Nikonian to the West Coast of Canada Taking life 2-gigs at a time
We can only hope that i-TTL will be the end of this nonsense, at least with respect to digital bodies. The DX-series of flashes, as we all remember, was only introduced to work around the D1 + SB-28 pre-flash problems....
Some people believe Nikon's published D70 specifications are clear as day on the subject of TTL capability: that only i-TTL speedlights will have any through-the-lens capability on the D70.
Others have heard from Nikon reps, etc. that the D70 will still be friendly to older speedlights and support D-TTL. Clearly there is conflicting opinions on this subject, which really should have a simple "Yes" or "No" answer.
Of course the only way to know for certain will be to mount your Metz on the D70 and take a few shots. Even if TTL doesn't work, perhaps the Auto mode (if there is one in your Metz) will yield acceptable results? Before the introduction of the SB-28DX, D1 users were forced to shoot using the 'A' mode exclusively...
As a proud owner of the D100 and sb28 I am used to put the flash in A mode. Almost no problem to find the right exposure. But..for the amount of money I had to pay for this combo it is not unreasenable to expect a bit more sophisticated style of flash shooting. The D70 will be much cheaper in price and the option to buy the sb800 with it looks very nice to me. Fill in flash with 1/500 sec ... wow, I can't wait for it.
One of the things to consider is when trying to use an existing third party accessory on a new camera model is that the accessory was not designed to use the new camera, and in fact was engineered before the new camera was, making compatability between the two, for all features, unlikely. Since iTTL is new, I doubt that existing third party flash units are going to work like a Nikon iTTL flash unit. So, unless I had some reliable info to suggest otherwise, I'd wait for confirmation from reputable users, or attempt to try it out on camera prior to buying.
While I'm not thrilled that we must buy a new iTTL flash unit to replace the, not that old, DX models, that is the price of progress, and some say that the iTTL is worth the money. In any event, that's the way it is, and we are going to have to get over it. Anyone getting into DSLR's should be aware that this technology is a rapidly developing one, and what was good yesterday is headed for the scrap pile today. )
I have been successfully shooting jumping horses indoors with a SB-26 atop a D1. To avoid the smearing effects of ambient light and be able to shoot at the maximum range of the SB-26 (Guide# 118) I run both the camera and flash in manual exposure modes and set the shutter at its fastest. I want to buy a D70 and have scoured the available published propaganda. Some publications say that the D70 will sync at 1/500th. Others say that the fill flash will sync. up to that shutter speed. My question to you lucky people out there that might presently have one is this. Will the D70 sync. at 1/500th with a legacy flash operating in "manual"?