Hi guys,
I am trying to decide between these two lenses. Has anybody used both? How does sharpness compare both above and under water? I will use it mostly for top side but also plan to fill the gap between the 10.5, 16 and 60 in my system for underwater. Also, how do they behave behind Subal ports? I see that Subal recomends a 70mm ext ring with the 17-55, does this make the housing too positive underwater? I also thought about the 18-70, but I read lots of reviews saying that it is too soft on the D2x, can anybody confirm/deny this?
Thanks for any info,
Luiz
P.S.: I'm sorry if this is an old question; I tried searching, but my browser is freezing and/or crashing when I search (Firefox on Mac OS X 10.3.9).