F-35A and friends RIAT 2016

I've been down to the Holbeach bombing range this week but only have the Canon 55-250 so very poor shots. Thinking about the sigma or tamron now
 
Well it just convinced me to place and order for the 150-600! Did you buy the sigma USB dock for this? (did you need it?)

I bought it thinking the lens wouldn't come with the latest firmware, but it did. I used it to assign modes to the C1 and C2 switches on the lens as well - focus speed and stabilisation etc. so yeah, I think it's a worthwhile investment.
 
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