>The 220Ex and 380EX are E-TTL only. The 550EX can be switched between
>E-TTL amd TTL. I'm not 100% sure, but I think the 420EX is E-TTL only.
>All EX speedlites are TTL only with type "B" bodies or when used with a
>Hot Shoe Adapter on an "A" type body **.
>
>** use a Hot Shoe Adapter between your Elan II and EX speedlight to get
>"simple" TTL.
Yo can do the same blocking some of the contacts between Body and Flash
using a perforated plastic sheet.
The TTL signal uses a dedicated pin on the hot shoe.
Seen from above:
1
2 3
4 5
1 Is the central contact.
I think that 2 is the TTL contact and 5 is flash ready, but I'm not sure.
Blocking 3 and 4 perhaps you can obtain plain TTL, but I suspect that you will
also loose AF-Assist light and auto zoom operation.
Hope it helps.
Vicente Jim�nez
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