Sony iTTL with SB-800

[wudabao]

today when I was trying to take a picture of my D70 (switched off), and 2 SB-800 (set to wireless su4, open)
my sony DC just use normal flash, the sony can control the SB-800 to flash.

[willyfoo]

That is not iTTL unfortunately... the SB-800 can be a slave to almost all cameras that does not use a pre-flash

[BurgaFlippinMan]

any idea how to make my sb800 slave to my oly c750?

[icebooke]

iTTL and SU4 mode are different. In iTTL you can control the exposure output by each SB800 unit independently of each other, from the master unit itself. In SU4 mode, you have to move to each and every unit and adjust the exposure of that unit.
iTTL was developed so that you can control 4 channels independently and all of these can be done without leaving your camera.

[gooseberry]

Originally Posted by BurgaFlippinMan any idea how to make my sb800 slave to my oly c750?

Put the SB-800 in SU-4 mode.

[espn]

SU-4 mode is to make the SB-800 be triggered off by another flash source, similar to the SU-4 remotes available by Nikon. WillyFoo is correct, there's no TTL, no D-TTL, no i-TTL. It's just flash.

[eric69]

Originally Posted by wudabao today when I was trying to take a picture of my D70 (switched off), and 2 SB-800 (set to wireless su4, open) my sony DC just use normal flash, the sony can control the SB-800 to flash.

Expected. Be careful of also earlier versions of these flashes that can also be triggered by Nikon's pre-monitoring flash. Such instants, these photos will always turn out unexposed.

Suggest use cable connection to slave flashes, instead of wireless mode using infared light type.

Cheers.

[yulee]

Anybody experience this problem? I use the 70-200 f2.8 on the D70/SB800 but the flash sync spd can't go below f4?

[gooseberry]

Originally Posted by yulee Anybody experience this problem? I use the 70-200 f2.8 on the D70/SB800 but the flash sync spd can't go below f4?

Are you talking about shutter speed or aperture setting here ?

If you are talking about aperture setting - are you in P (or Auto) mode ? If so, it won't go below f/4 no matter what lens. You need to use A or S (aperture or shutter priority) mode (or Manual mode)

[yulee]

Thanks for the info gooseberry !

[Adiemus]

Originally Posted by gooseberry Are you talking about shutter speed or aperture setting here ? If you are talking about aperture setting - are you in P (or Auto) mode ? If so, it won't go below f/4 no matter what lens. You need to use A or S (aperture or shutter priority) mode (or Manual mode)

goosberry is right. if you check you D70 manual, you'll find that in P mode, with some Nikon lenses, you will not be able to set the biggest aperture.