Nikon sb-700 TTL does it work with diffuser on?

When i put the the standard box diffuser on my Nikon sb-700 flash, the zoom head position does not follow my len s focal length even when the flash it set on TTL mode. Once the diffuser is taken off the zoom head position syncs with the len s focal length again. Any one knows why this is so? Is the TTL not suppose to work with a diffuser?

Of course it should.

The diffuser that came with my Nikon flash does not cause the auto-zoom not work.

If the information you need is not in your user manual, call Nikon and ask them. 800.NIKON-UX

The diffuser is covering the sensor (that red covered part in front of the flash). When you decide to modify the light, be ready to go manual. It's better that way!

See page E-10 in your manual. It will tell you what happens when you use the diffusion dome. When you use the diffusion dome, it doesn't make sense to have auto zoom since you're trying to diffuse the light.

BTW, TTL is an exposure control system, not a flash zoom function. Your flash/camera TTL functionality will work fine when tupperware is attached.

Actually… This is explained in your owner's manual. When you put a diffuser on the flash head, zoom on FLASH will remain at the widest setup. Your flash will not zoom in and out when you zoom your lens in and out.

Think about this… Defuser is to defuse the light as wide as it can. It would make no sense to zoom the flash in then defuse.

TTL will work perfectly with out without the defuser. However, the "reach" of the flash is severely reduced. You only have a limited amount of "fire power". If you try to cover more area by defuser, the distance has to be limited to cover that with the same amount of light.

Your flash is perfectly fine.

I tend not to use the defuser that much. I prefer bouncing. It gives me more even lighting and produces natural appearance on the image.