Best method to go beyond 500mm?

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q5sys
q5sys Regular Member • Posts: 313
Best method to go beyond 500mm?

I've been looking into my options and I was curious for input from people here.
The primary use of this will be high speed action shots (Air Shows, Racing Events, etc).

So far I've come up with the following options that will allow me to retain autofocus. I have the 800mm Mirror Rokinon, but it's manual focus so I'm not considering it an option.

Minolta/Sony 500mm AF reflex
Sony 300m f2.8 + Sony 2.0 TC
Sony 70-400mm f4-5.6 + Sony 1.4 TC
Sigma 50-500mm f4.5-6.3
Sigma 150-500mm
Tamron SP 150-600mm f5-6.3
And obviously... the Sony 500mm f4

Of the above options, I'm sure the Sony will probably be the sharpest and best lens, but it obviously comes with a price tag to match.

Are there any other options I'm not aware of?

I'm looking for clarity first, price second, ease of use third. I don't care if it weighs 10 lbs, or is awkward to work with, as long as its possible to carry with a sling/harness/bag, I'm fine. That's why I'm not listing my 1000mm f5 telescope.

EDIT:  I will be using whatever on my a99ii. I figured I might as well state that before someone asks.

 q5sys's gear list:q5sys's gear list
Sony Cyber-shot DSC-F828 Sony SLT-A65 Sony a77 II Sony a5100 Sony a99 II +33 more
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