Another factor might be fuel availability. 100LL is commonly available in the US. Is it harder to get in China?

Photos are taken for different reasons by different consumers. In the US there are a number of government agencies that fund aerial photography for different purposes. Flood survey, crop survey, visible light, IR, etc. In other parts of the world the governments may be using the data for different purposes which may favor higher altitude operating.

There is a 206 currently based at one of my home airports. The exhaust pipes are extended to aft of the camera. Not sure who is chartering it.

Best of luck,

Wes
N78PS


Best of luck,

Wes