[daft_biker]

Originally Posted by simplyjoed

Hi,
But what is the advantage of auto focus against manual.

It makes the lens more versatile. I use my Canon 100mm macro for portaits and action shots of bikes too.

However, the focus ring on my Canon 100mm is geared for speed which makes it more difficult to make fine adjustments manually as a litle movement on the focus ring can move the focus quite a lot. In contrast the autofocus on the Canon 180mm is pretty slow but it's much easier to make fine adjustments using the focus ring.

For what it's woth my favourite macro lens (Canon MP-E 65mm) is manual focus only but the only thing it can do is macro so it's not an issue. It's a spe******ed lens rather than a lens for general use.