[iceman (Mike)]

Hi.

For my webcam imaging, I use a 5x powermate with my ToUcam.

I pull the ToUcam out to the very edge of the powermate to give me a slight increase in focal length, and therefore bigger image scale.

To get an even bigger image scale with my short focal length newt, I want to use an extension tube between the ToUcam and the Powermate to give me more focal length.

What type of extension tubes are there?
Where do you get them from?
How much are they?
Is there a cheap alternate DIY version available - like, PVC pipe or something?

Thanks