I'm finally upgrading from my old S&S D200 setup to a Nauticam D7200 setup. I have a SIgma 17-70 2.8-4.5. which I seem to use once or twice on most trips.
While I'm buying new ports/ extension rings/gears, thought I would upgrade to the new Sigma 17-70 2.8-4.0 macro OS HSM. I find, there are atleast two different versions of this lens sense I bought mine.
Sigma 17-70 2.8-4.0 macro OS HSM
Sigma 17-70 2.8-4.0 macro OS HSM Contemporary or C
The Contemporary is the latest version, but has a 30% smaller barrel and different optics inside than the older models. I know optics have come a long way the last few years, but wanted to get others opinions here before I buy.
Thanks in advance for you help and advice.