Originally posted by drabina Correct me if I am wrong, but I thought that ST model does not support P-TTL. Only Super does.
I think you are wrong. Please check this:
Sigma - Flashes
The page says:
Compatible cameras SIGMA AF, NIKON AF, CANON AF, SONY AF, PENTAX AF
For pentax the barcode number is:
EF-530 DG ST PA-PTTL : 00-85126-92528-4
Here is also a B&H page:
Sigma | EF-530 DG ST Flash for Pentax P-TTL | 179-109 | B&H
that says:
TTL Dedication Yes (P-TTL)
So I'm quite sure that the P-TTL is supported. But anyway I wanted to hear about how it works from people who really used the flash.