I just bought a tamron 90mm and was just learning to play around with macro. I try to shoot macro with F2.8 and F5.6. Is it suppose to be normal for the sides to be soften? The center focus is sharp and anything after the focus point is blurring off. Is it normal? But if i shoot at a higher F, its fine.
So does this means that if i were to shoot macro, its always the best to use higher F?