I use a BARE mini dome 4-3/4" and optimized for 10-17. It required using an adapter to convert a Nexus port to my Sea & Sea. Works fine with or without the tele. The 60mm is much longer when extended for focus and required my 20mm extension to avoid hitting the port. The only time I used the 10-17 with the extension, unfortunately I forgot to attach my hot shoe connector and ended up with shots lit by my focus light (which came out pretty cool). Doesn't help much with knowing edge sharpness and such, though. You should ask Ryan (reef photovideo) about using the zen with the tele, because he builds the port. Here's a link to a thread where I posted some shots with the 10-17 and tele. http://www.scubaboard.com/forums/strobes-lighting/462528-using-video-lights-stills.html