Hi
I searching for a plugin to upload a main image to an K2 article and to choose an detail frame (right expression?) in the proportions f.e. 16:9, which I fix as admin. At the end all the images on a cat list have the same size and are landscape or vertical, how the admin like it.
Does anybody have such a plugin in use or knows about it?

A dream would be if the author could zoom in the pic as well to find the right detail.

I hope you can help me...

I have not heard of such an extension but have you looked at JED or getk2.org/extend/extensions ?