Sorry, I was posting earlier in a hurry, and that didn't quite come out the way I intended. You are right, they do essentially balance out, but the other nice thing you get with longer lenses is a more natural perspective and less distortion of facial features, etc. Obviously this all depends on circumstances, because if you want to shoot full length on a long lens you need lots of room to back up.
Yes, you have more camera shake, but even 1/125 should be hand holdable on a 100mm, especially if it has IS. A prime will be sharper at lower apertures than a zoom, which means if you don't need a huge DOF you can use a wider aperture without having to worry as much about lens distortion, vignetting, and corner sharpness issues.
Yes, you have more camera shake, but even 1/125 should be hand holdable on a 100mm, especially if it has IS. A prime will be sharper at lower apertures than a zoom, which means if you don't need a huge DOF you can use a wider aperture without having to worry as much about lens distortion, vignetting, and corner sharpness issues.
