Mixing TTL flash with manual flash - wedding receptions
A common technique used in photographing wedding receptions, is to use additional lighting to lift the general light levels in large reception rooms. The additional lights can be wirelessly controlled TTL flash - but more often the additional lighting would be manual flash. Then you can use an on-camera flash, either in manual or in TTL.
My preference when working like this, is for my on-camera flash to be used in TTL mode, and the additional light(s) to be in manual. In the photograph above, taken during a wedding Read more inside...