600GM initial images and 2x @ 1200mm

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terryreid Senior Member • Posts: 2,100
600GM initial images and 2x @ 1200mm

I only spend 40 min at the local zoo but very pleased with the images I got my first time out with my a7rIII on a Gitzo monopod shooting at ISO 800.

There is also at thread on FM where a fellow has an excellent shot with his and a 2x TC at ISO 3200.

I asked him how he got such a good result and he said on his 600 the 2x performs better than the 1.4?

So I just tried my 2x which has been collecting dust as I did not care for it with my 70-200GM or 100-400GM.


Does anyone have any thoughts or can explain why Sony's TC's perform better on longer FL's?

600 GM



600 GM + 2x tc 1/200th of a second

600 GM + 2x tc 1/30th of a second

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