I am looking at options for my Tokina 10-17 on a D90. I am looking at more compact options than the Nauticam 8.5 or NX Fisheye Dome. I am also interested in general wide angle, reef scenics and split shots, so the 100 mm domes are not a consideration. I have searched the forums and there is a lot of info recommending the Sea & Sea optical dome or the NX F/E or similar large dome. In fact there has been quite a few posts really praising the optical dome port as an excellent choice for the 10-17 and the favored port of several experienced shooters here. However, generally the compact port is said to suffer issues such as soft corners. I realize that you need to use an SX extension with both ports. However, it seems to me that the NX compact dome and the optical dome are both just about the same size. So what is it that makes the optical dome such a great choice, but the compact port not so recommended? Is there a difference in the curvature of the domes that makes one better optically?
Thanks.
