Here's a photo that demonstrates Full Frame vs APS-C:As you can see there is a big difference. What this means is that a 35mm lens on a camera with a full frame sensor is recorded as a 35mm lens. A 35mm lens on a camera with a APS-C sensor will record only a portion of the image making the 35mm lens appear more like a 50mm lens.
This doesn't mean you can't use a camera with the APS-C sensor on a steadycam and not get steady results. I use a Canon 7D and Canon t3i (both have APS-C sensors) with my SteadiGO and get beautifully smooth results. Since my cameras have cropped sensors I use lenses from 28mm to 10mm when using a handheld stabilizer.
What you should consider if using an APS-C sensor is that if you want the equivalent of a 35mm lens you would need to use a wider lens closer to 20mm since it will be cropped by the sensor. Video courtesy of www.SteadiGO.com
Written by Aaron Marinel
Owner - SteadiRigs LLC