I've using a Canon S1 IS digital camera set at 640 x 480 30 fps to film
propeller driven 'planes

The results are good except for the propellers look unreal i.e. turning very slowly

Is this the case with camcorders , if not what's the difference between the two

Thanks for any help

den

All motion picture cameras can have this effect on apparent propeller speed. It's caused by the camera frame rate being a near multiple of the prop revolutions per second. At some prop speeds the camera can actually make it look like it's going in reverse.

Not much can be done about it since we can't change the camera frame rate without introducing extra editing headaches. Increasing the exposure time per frame will make the prop blades blur a bit, maybe enough to hide the slow speed appearance. Or you can ask the plane pilot to change his engine rpms.

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System - Athlon 1.4GHz, Win98, Hauppauge PVR250 receiver and compressor.
Software -Magix Movie Edit Pro 10, Nero 6 + NeroVision Express, Moho 4.61, PSP 8.1, Bryce, Quicktime 6.52 pro, Goldwave 5, DVD-Lab.
Cameras - Panasonic GS9, Canon ES8400V, Canon EOS D20 and Canon A70

Crusty's right. The effect you are seeing is called 'Aliasing'. maybe you can slow down the shutter speed slightly toget a blurred image on each frame?

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Thanks for your comments

most helpful

den