I've just started experimenting with off camera flashes using my film SLR cameras and a Nikon SB-28 speedlight that is capable of manual power control.
It seems I would benefit from being able to adjust the power without going up to the flash every time. Initially I was using the simplest radio triggers.
Are there any radio triggers that can specifically control above flash, or what specifications should I look for in this regard? I saw some triggers are able to do this with an LCD screen, I'm just not sure what is compatible with what.