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500mm vs 600mm?

Started Nov 13, 2017 | Questions thread
BirdShooter7 Veteran Member • Posts: 9,134
Re: I'll complicate the matter a little...

The two copies I had were good, the second better than the first.  I was very pleased with the performance of the bare lens and with the 1.4x but I definitely saw a drop off in quality with the 2x that was more pronounced than what I see with my 300mm f/2.8, 400mm f/2.8, 500mm f/4 and 600mm f/4.  This is not to suggest the mk2 400mm f/4 is not a great lens, I actually like it quite a bit.  It does have some pretty stiff competition from the other big primes is all.

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Some of my bird photos can be viewed here: https://www.flickr.com/photos/gregsbirds/

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