port body question

[scuba-s]

am looking at either of 2 lens the tonkina 11-16 and tonkina 12-24 i noticed can you use these lens with the 8 inch dome and if yes what port bodies do you need and do you need to use a diopter with either lens for corner sharpness any help would be appreciated
steve

 

[BrettF]

Steve,

You will need port body #5510.22 for the 11-16mm lens and #5510.16 for the 12-24mm lens. A +2 diopter is not necessary, but will likely improve corner sharpness. Also, closing the aperture down slightly will improve depth-of-field which also improves corner sharpness.

Regards,