I'm wondering if any Sony users, or anyone really, have an insight into whether the zeiss lenses are worth the extra cash? Still having the kit lens as my only lens, I have no experience of comparisons. Any thoughts? Also, im after an extra bit of reach more than the 50mm on the kit lens, but budget allows for the 16 - 70mm zeiss. Will I notice the extra do you think, or should I go for a cheaper lens which will give me more reach?