I find that I can use the mouse wheel to toggle to zoom level 10.
For instance, at the obs periscope I can scroll up once to go to 1x zoom. Then I can scroll up once more to go to 10x zoom.
To do this, all you have to do is use TT's mini tweek tool and change the camera.dat "optical" settings. You can do this for whichever instrument you want: UZO, obs peri, attack peri, binoculars. Go to the optical tab for the instrument and change the unknown values 1 and 2.
The first value will be the zoom level for the first wheel scroll. The second value will be the zoom level for the second wheel scroll. For instance, here are the default values for the obs periscope:
unknown value = 1
unknown value =
4
Change it to this:
unknown value = 1
unknown value =
10
And it will work
THE TRICK... is that you have to move the backup file that is created in data\library. It is called "Copy of Cameras.dat" and you cannot leave it in that folder or else it will override any changes you have made. Either move it out or put it in a sub-folder.
Try it!