How does the old K/M/A 100/4.0 Macro compare optically to the F/FA 100/2.8 Macro?
>From http://www.pbase.com/steephill/image/38667710, it looks like the 2.8 resolves more detail. What about other factors? I've read either here or on DPReview or both that Pentax macros are better than the best 3rd-party macros, including the Tamron 90 and the Sigma 105. What about the K/M/A 100/4.0 Macro -- is it also better than the Tamron 90 and the Sigma 105? Also, I'm surprised at how much smaller and lighter the new D FA 100/2.8 is compared to its FA predecessor. Does it sacrifice image quality compared to the FA? Thanks, Greg
