Thanks. Yes, my aim is to get the 600mm f4 but just don't have the cash! Still, the results with the 200-600mm f6.3 are still more than acceptable.Great pics. The picture quality using the A1 is incredible. I have a 400mm 2.8 and a 2x tc permanently attached for bird pics. The Sony lense is so sharp.
I ordered this after it had been out of stock everywhere, and managed to get one just before a trip to the Shetlands. I'm still getting used to its capabilities, but I'm having fun with it so far. I had previously been using the A9, which I'll keep and get a smaller lens to use for hoverflies. The A1 is definitely a step up. I like the fact that it supports lossless raw, which saves on disk space. I've not used the full 30 fps second functionality yet, but will look forward to doing so, when the opportunity arises. Note: the diver and the phalarope were taken in very poor light on Fetlar, when the island was bathed in dense haar for the whole day.
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Bird Image quality looks great, personally as a "static" I would prefer a lens a little wider to reduce the dof but should be good for flight shots if you can hold 2kgs