Do not use Matrix TTL All the time!

[cy_j]

I think Marc is referring to Matrix TTL and plain old TTL on SB-80DX, and not matrix or spot metering. Those with D70 and SB-800 can ignore. Seems like everyone talking about different thing in this thread, very confusing.

:bsmilie: :bsmilie: too true. i-TTL matrix metering so far works great with my D70 and the SB800 :thumbsup:

 

[marcwang]

Though the comments about matrix vs TTL flash metering are mainly correct, the main reason for the underexposure you experienced is actually a mistake in your setting.

In a lowlight situation where ambient levels are below the default sync speed of 1/60s(Program/Aperture modes), using exposure compensation will only modulate your flash output and do nothing to your ambient.

Whether you are using Matrix or plain TTL, -1EC is equal to -1FEC since the shutter speed doesn't change.

This behaviour applies to both nikon and minolta flash systems.

User111 has already pointed this out.

Thanks for pointing out. I didnt know that man.

 

[BurgaFlippinMan]

marc, u do mean TTL BL and TTL do u?

 

[strider]

Getting a bit of headache, are we talking about i-ttl in D70/ SB800 combo?
For D70:
In my experiments, I set my min flash sync mode to 1/15 (or less, and dial camera FEC to -1, then flash FEC to +1. . I find that this allows me to have ambient at -1 exposure, and perfect exposure on the main subject. Can any tell me if this is the way the settings work in theory?

Of course this method is a bit of headache, since you have to check that 1/15 shutter speed will actually allow a -1 exposure.. sometimes too dark , which make me wish for a f2.8 !

of course got to consider other things such as WB, motion blur,etc

But the end result is more atmospheric than poor flash blasting!