In article , guest@murdoch.acc.virginia.edu says... [...]

>Q: Is there an adapter -- made by Nikon or a third-party
> supplier -- that lets you use "standard" (ISO type hotshoe)
> speedlights with the Nikon F3, *in TTL mode*?

No (the Vivitar adapter notwithstanding....), but your SB-26
in "A" mode will work very well on the AS-7. Try it, you'll
like it!
Hope This Helps