Filter->Digital Camera->Undistort Lens... could be applied as dynamic filter to normal image, but it is hidden option

[shijan]

I just discovered that if i apply Filter->Digital Camera->Undistort Lens... to Placeholder and create action from this, i can later apply same action to normal image without converting it to Placeholder.

[shijan]

Here is email reply about this option by Martin Huber:
"Dynamic Filters are operations that always need to operate on the full image, in contrast to adjustments that can operate on parts and/or on scaled down versions of an image. Because of that, a Dynamic Filter can get quite slow and isn't suitable for interactive work.

Therefore per default they just work in combination with placeholders. If you have to edit the base image, you can perform several edit steps, and after you are done, you save the placeholder and the Dynamic Filter kicks in. This way, the low speed of Dynamic Filters doesn't matter that much.

I allowed (undocumented) indirect steps to create Dynamic Filters with images, but don't intend to allow that generally."