Maybe someone can enlighten me. Some zoom lenses are physically longest at their longest focal length, such as the FA24-90. Others, like the FA28-70/4 AL are physically shortest at their longest FL. Does anyone know why this is, and what advantage or disadvantage each design has? I get along much better with short physical length lenses simply because a bit of movement at the camera isn't amplified so much at the end of the lens. Just curious.
Don
