google earth camera lens control?

[sbaerial]

In looking at KML examples I only see controls for position and orientation of the google earth camera.  Is there any way to control focal length?

[barryhunter (KML Guru)]

Not directly. 

Google Earth has a fixed angle of view. So KML evolved to need to support specifying a field of view and/or focal length. 

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The only way to approximate it, is via PhotoOverlay

https://developers.google.com/kml/documentation/photos

for such photos can specify a field of view. And Google Earth will change the fov of the backdrop view (so in theory the GE scenery would match that shown in the photo)

Can use a completely transparent 'photo', so that you only really see the GE terrain - with the latered Fov. 

But this is kind of awkward, and will not fit all scenarios. 

[barryhunter (KML Guru)]

Oh, apprently can use tours too

http://www.gearthblog.com/blog/archives/2014/10/using-kml-change-field-view-google-earth.html

can specify a fx:horizFov as part of a tour
https://developers.google.com/kml/documentation/kmlreference#gxhorizfov