Originally posted by stevebrot That is some creative thinking. I will offer these suggestions and then bug out:
- Pentax SR is limited to movements at the sensor plane and supports X and Y axis correction in addition to rotation
- Related to above: SR does not tilt the sensor away from the lens axis
- Repeat for emphasis: SR does not tilt the sensor. Doing so would shift focus during exposure...not a good idea
- The composition adjustment feature (when supported) is an expression of movement in X and Y directions
- Horizon correction (when supported) is an expression of the rotation feature
- There is no movement in the Z axis as would be required for pitch or yaw correction
- On systems that do support pitch and yaw correction (Sony and Olympus), that aspect is done using in-lens optical stabilization.
All of the above are documented in various reviews. You many also confirm by using M-mode, shutter on "B" with no lens mounted. Press the shutter button and see what motions are compensated for. Prepare to be both alarmed an amazed.
Steve
I know, that is why I wrote ”It does however correct the blue motions by shifting the sensor in the orange directions.”
So when you turn your camera left/right, like the blue arrows show, the SR compensates this motion by shifting the sensor laterally in the X direction, illustrated by the orange arrows.
I too suggest you take a look at the sensor by using M-mode and so on, except don’t use Bulb mode as that will disable SR, enter instead a large shutter time like 10sec or so. Enter a large focal length and test turning left/right, notice the large movement of the sensor.
Then move the camera laterally against a ruler so you don’t accidently turn it, notice that there is no movement of the sensor.
Summery, twist and turn the camera results in large sensor movement. Lateral movement of the camera results in no movement of the sensor.