Eureka!

Eureka!, originally uploaded by uw-eric.

I finally got it right! I bought a Sigma 10-20mm lens this summer to be used underwater. The Sigma fits the PPE-E05 port, normally suitable for the standard kit lens. This port is HUGE and after careful analysis I found out the Sigma would fit in the port, without any trouble. The port is big enough - no vignetting. The only problem that remained was that I couldn't zoom the lens. I took a few shots with it (see my photostream) but one thing was missing...Zoom.

Guess what - now I can. By using a caterpilar track normally found in LEGO Mindstorms I managed to create a zoomring that can be operated by the zoom knob on the outside of the camerahousing. The track is folded around the lens and fixed in place by using a rubber band. Eureka! It works...