http://instinct.pro/blogs/news/new-retractable-carbon-camera-boom

In the fall we added what we called a MODULAR carbon camera boom -
our first carbon offering. Those simply two carbon rods inside each other and
DOUBLES the length of our original aluminum camera boom.

We have now added a RETRACTABLE option as well! These may be a limited time only
offering as we want to see how well they are received. The outboard carbon boom
slides nicely inside the inboard carbon rod and we have drilled three positions
for the rods to be anchored to give the pilot the options as to what length they
set before flight. We only manufactured one dozen of these so get them while
they last.