D 550D wrote in post #15584332
I moved the flash to the right later on at the shoot and I mixed things up while I wrote the first post. Silly me...
Unfortunately there is only so much that can be done with one speedlight. Guess I should have brought my 430 EX II with me to help the Nissin.
Wherever the flash was, it wasn't affecting the exposure looking at that shot.
As you say, there is only so much you can do with one speedlite. You are going to need a lot more light or a duller day I think. Your settings for that shot are spot on for a subject in good sunlight, so you are going to need to use a faster shutter speed (if you can manage HSS off camera), smaller aperture or lower ISO (if your camera has the ISO 50 expansion capability) or a combination of all 3 of course, to knock your ambient exposure down by 2-3 stops.
Of course, if you don't have HSS and ISO 50, that would leave you needing f/22 at least, which is likely to have some quite noticeable diffraction softening.
You can get around those limits by using a ND filter to dial down the light, so allowing use of the settings you used. The ambient would be reduced by the appropriate number of stops, by the filter, so would now be sufficiently low that it doesn't correctly expose your subject. Of course, the filter will also reduce the light from the flash, so you will need some serious flash output to compensate.
I think you are going to struggle to sufficiently override full sunshine with the two flashguns. You may need to use a studio type strobe (or strobes) powered by a battery pack