Nikonian72 wrote:
"Ghosting" with speedlight in full sunlight is a product of improper (too long) shutter duration, NOT because of speedlight. ALL of my hand-held macro-photography is ISO 200, 1/250-sec at f/16. The ONLY variable is speedlight output, depending on color-brightness of subject. Full sunlight, diffused sunlight, shadow, or deep shadow, camera settings never change, only the speedlight output.
Like I said, I use high speed sync with flash outside when doing high speed subjects like bird/bird wings. I found that I got ghosting and edge blur even with the highest "normal" sync speed on my cameras. And I sometimes use a 180 macro with 1.4x on a crop sensor for an angle of view equal to just over 400 mm. Usually when sitting in a lawn chair near the humming bird feeders or when trying for butterflies and bees on the flowers.