[stoppingdown]

It already sounds absurd to have a mirrorless system designed to be compact, and add an adapter and a long kilo's heavy lens...

 

Clearly less absurd than adding yet one more piece  . 

 

For the 150-600, no, I don't plan to hand hold it for moving subjects. It would go most of the times on the tripod, on a bean bag, on the car window mount or a monopod. The reasonably light, hand held, birding lens ("solution #1" in my previous post) has just no options now. In theory, the newest Nikkor 300mm E could be an option _if_ existed a Nikon adapter with support for stabilisation and AF. More realistically, I hope to see some similar lens from other brands in 2016/2017.