Kx Shake reduction question.

[willyflyboy]

I am planing on  getting a Kx for aerial photographing. I have had a problem in the past of the shake reduction not being locked when it is off. So my question is, Will the sensor stay put when turned off? or does it just float around. The heli I use has very high frequency vibrations and the Canon (Sorry) had motion blur even at a 1000th of a sec. could not keep up. When I turned it off it just floated about. I know that Canon uses optical shake reduction. I used a Nikon D3000 last weekend it it seemed a lot better then the Canon. The D3000 did not have shake reduction at all. I have another dumb question, The Kx has a CMOS Sensor. So when taking photos does it still have the rolling shutter jello thing going on or is it just a Video thing.

[Ron Kruger]

I've taken aerial shot from a small plan, just sticking the camera out the window on a slow bank, and got very sharp images with SR on. Hand-held, it would seem SR would be a plus from a plane. It's still a shaky environment, but your body absorbs the high-frequency vibrations. If your camera is somehow fixted to the craft, I'm not sure what to do.
I believe when SR is off, the sensor is not "fixed." But I'm not at all sure about that.

[willyflyboy]

I know what you mean about an aircraft. Here is what I use.

[Ron Kruger]

Oh--never mind.

[spyglass]

Pentax recommends not using the shake reduction when using the camera on a tripod mount (probably due to the action / vibration of the shake reduction feeding back into the camera and the feature ending up trying to correct for itself  like a dog chasing its tail). If your mount is quite rigid you may find that the results are worse when using shake reduction. Have you explored any vibration reduction mounts or counter weight techniques? 


I love Ron's reply when he saw your aerial means..... "oh... never mind" (this is really different, but very cool)


Spyglass

[mikro]

Isnt the rolling shutter "Jello" look only a problem with CCD's?

ok...I looked it up.

From Wikipedia:

Rolling shutter (also known as line scan) is a method of image acquisition in which each frame is recorded not from a snapshot of a single point in time, but rather by scanning across the frame either vertically or horizontally. In other words, not all parts of the image are recorded at exactly the same time, even though the whole frame is displayed at the same time during playback. This produces predictable distortions of fast moving objects or when the sensor captures rapid flashes of light.

This method is implemented by rolling (moving) the shutter across the exposable image area instead of exposing the image area all at the same time (the shutter could be either mechanical or electronic). The advantage of this method is that the image sensor can continue to gather photons during the acquisition process, thus increasing sensitivity. It is found on some film cameras (such as the Graflex Speed Graphic), as well as digital still and video cameras using CMOS sensors, and is most noticeable when imaging extreme conditions of motion or the fast flashing of light. While some CMOS sensors use a global shutter,[1] the majority found in the consumer market utilize a rolling shutter.

[willyflyboy]

So I gather that the rolling shutter is still active even when taking a picture. If I did a long exposure the problem world be still there. So in my helicopter that has varius moving parts from a motor turning 28,000RPM to the main rotor turning 2000 RPM. I try to get perfectly it balanced but there is still some vibrations cxome through. So I guess I'm stuck with CCD.

[Mike Pearson]

Couldn't answer your question Bill but great to hear from you   

Mike