Those wavy lines?

[Goldenhour]

What makes the wavy line effects. I have a 450 pro with a $20 chinese mini dv attached with velcro. A few videos came out great but some are real shaky. Everyone sure loves the videos. See youtube "450pro kaso"

[OpticalFlow]

the wavy lines are caused by the rolling shutter effect, which is caused by the image being exposed from top to bottom over a period of time rather than all at once. Most CMOS sensors have rolling shutters, CCD sensors don't

[Trnquill]

Originally Posted by OpticalFlow

the wavy lines are caused by the rolling shutter effect

...or rolling shutter technology combined with excess vibration of a heli, to be precise. Rolling shutter is no problem in ordinary shooting (if you forget some early products that had "jello cam" effect on hand shooting, too). It can be visible only in very fast pans (something you would rarely do) or when subjected to fast vibration. The camera shakes left & right & back & forth & up & down all the time when on board a heli. The left to right and back direction is the cause of the waviness (combined with the rolling shutter, as stated).

Change the camera and/or enhance your vibration dampening and/or remove the vibration source.

[Topkapi]

Here is a link to an informative demonstration of the difference between CMOS and CCD sensors.

http://www.dvxuser.com/jason/CMOS-CCD/

Only slow camera movements and low vibration can reduce most, but not all, of the rolling shutter effect with a CMOS sensor.

Unfortunately, the economics of designing and producing sensors favors CMOS chips. Looks like they're here to stay.

[Windbreaker]

CMOS sensors can create some very VERY nice images. The RED camera and the Sony EX1 are among the cameras that use this technology.

Just don't shake 'em!