This is not the brightest or the most powerful, and it's a bit "plastic" but: He is small, it is light, it distorts little, It accepts a filter, and it gives sufficient clarity for the A3, all for a reasonable price. Certainly it is not bright, and it has no stabilization offsetting. But it goes without worries on my OIympus Om-D and on my Panasonic G2 and allows unusual and often spectacular photos. To have used a lot, I can not recommend it highly!
