Sigma announced a new macro lens today, the 70mm F2.8 EX DG. At first glance, at least, this looks like a winner. 70mm is a nice length, a drop-in replacement for the 105mm many photographers carry as a go-to lens. Thow in 1:1 macro at a minimum 10.5in, and what's not to like? It also features Sigma's "focus limiter switch" to improve autofocus response times, and the EX rating means coated, SLD glass for bright, flare-free shots with low CA. As always, I'll wait until I see it in action--or at least see the MTF chart--before I put down any money, but for $570 MSRP, this looks like a steal.Sigma Macro 70mm F2.8 EX DG
Sigma announced a new macro lens today, the 70mm F2.8 EX DG. At first glance, at least, this looks like a winner. 70mm is a nice length, a drop-in replacement for the 105mm many photographers carry as a go-to lens. Thow in 1:1 macro at a minimum 10.5in, and what's not to like? It also features Sigma's "focus limiter switch" to improve autofocus response times, and the EX rating means coated, SLD glass for bright, flare-free shots with low CA. As always, I'll wait until I see it in action--or at least see the MTF chart--before I put down any money, but for $570 MSRP, this looks like a steal.
1. Interesting lens. I have seen a couple of reviews that claim this lens is an IF design - i.e., focusing doesn't change the length of the lens. Can anyone confirm or deny this from handling a sample lens? If this is not the case, what is the length of the lens at its closest focus?
TIA -
Regards,
Tony
Posted at 4:00AM on Sep 30th 2006 by Tony Jeffree