jli86 wrote in post #2148311
does the 580 generate more natural looking results than the 430?
Generating natural looking results is a matter of skill and experience, not so much technology. Learning how to bounce the flash, select the most appropriate diffusion device (if any), and balancing flash with ambient light are all skills which take some time to learn.
What the extra stop of power (of the 580 vs. the 430) gives you is the ability to use a smaller aperture or a lower ISO setting in a given situation. In some situations this translates into better image quality through greater depth-of-field or less digital noise. But again, some skill is required to make the most of your flash unit's power, and to know when that power is needed.