They say the larger the light source the better. But since I'll be stuck
with speedlights (580 EXII to be exact), what's the largest
umbrella/softbox I could pair in with my 580? 43 inch?



Would a 43 inch umbrella covers the capability of a smaller umbrella,
such as 36-40 inch?



Let's say I'll be covering portraits from face shots, to two person full
body. Would 43 inch be enough to cover all that range?



As for reflectors, same question about their sizes, the larger the
better? Assuming I'll use the sun this time to gather light than a
speedlight. Are rectangular better than those circular type reflectors?





I wanna invest in these soon and since I'm just a hobbyist, I don't have
a return of investment. so buying what I'll be using would be critical.



Thanks!