Opteka's new 23" Slider video sample from Vimeo member skooKILLfilms. Camera used was the Canon 60D + 18-135mm kit lens and Samyang 8mm. The Opteka 23" slider is based on the IGUS rails, and offers a decent start for those who aren't looking to modify or DIY their own. It's an inexpensive slider that can provide excellent results, especially if you're shooting on a smaller format camera like the Sony NEX or Micro Four Thirds system, these linear rails should work fine.

Opteka DSLR Video Camera Sliders