Having an optical zoom is a great advantage over using digital zoom software. The picture is much clearer, and you have real visual information per pixel, not just bloated pixel groups which end up looking fuzzy (and may or may not actually represent the intended picture). To that end, Brando has a telescope case for the venerable iPhone that gives a sweet 6x telephoto capability to the phone.
The zoom case is rather awkward, but it does encase the whole iPhone for protection. But as an optional device (and we think the lens can be removed for transportation and regular use), the zoom case could be a great bonus for any iPhone photography you need to do. The price is right too, at $19. You can find the iPhone Zoom Case at Brando.