Precision 5" dome reviews/thoughts?

Hi All

I am thinking about purchasing a 5" precision dome for Canon FF to use with the 8-15mm. I would like to also use it with a teleconverter when the occasion arises. Does any one have any reviews/thoughts on this product, as a google search reveals very little. Also if anyone can share/link any images taken with this dome that would be most appreciated.

Thanks and happy diving

I have one from http://uwcamerastuff.com.

It works great, now. Mine had a slight leak at the glued seam between the dome and the black plastic base. Upon contacting the seller I was told how to seal it properly. It has been water tight since. Double check seam before first dive. You can do that in a sink.
Optically? works best for me with a 10.5 fisheye lens. Works decent with a 18-55 lens and a +2 diopter. doesn't work that well with a 12-24 lens.
The dome port share, make sure its on straight when using the fisheye. It will get scuffed during use, it polishes up nicely Novus plastic polish.

For the 8-15mm with FF will be better the 8-9".

I check in the Isotecnic web site ed in the chart I find this:

1) Dome 5" with extension ring of 40mm

2) Dome 8" with extension ring of 30mm