Can Fuji XT-4 IBIS correct stabilize wide lens without warped edges?

Started 3 months ago | Questions thread
Truman Prevatt
Truman Prevatt Forum Pro • Posts: 11,852
Re: Can Fuji XT-4 IBIS correct stabilize wide lens without warped edges?

If you draw a picture it becomes clear as the geometry is pretty simple. The wider the angle of view the more the image perspective changes and as the sensor is moved this motion is modulated onto the image. That is particularly true on the edges when the motion is in the row, pitch or yaw direction.

This distortion is a function not only on the offset of the sensor from the rest portion but also the distance of objects from the sensor. That is not something a F/W "fix" can address.

IBIS has a sweet spot for operation. For long lenses OIS gives better performance since the sensor is limited in how much it can move. That is the change from camera movement is magnified along with the image. In super wide angle lenses (focal length of 16 or less), the angular movement of the sensor is modulated onto the image.

IBIS is going to perform best in the 23 through about 56 mm focal lengths (on APSC).

For walking with a wide angle - one word: gimbal which maintains the camera at rest and the sensor perpendicular to the lens axis.

The underlying optical principle at play here is known as the Scheimpflug principle.

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