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MTF Lens Tests of the New Tamron 70-200 f/2.8 SP Di VC USD G2

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There’s been a bit of rumbling lately about the new Tamron 70-200mm f/2.8 G2 zoom. Not just because it is a frontrunner in the 2017 Most Initials in the Name Award, but because a lot of people are saying it’s really quite good. The previous Tamron 70-200mm f/2.8 was a good lens, but since they only […]

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Painting Zoom Lenses with a Broad Brush – Roger’s Law of Wide Zoom Relativity

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I’ve been writing peer-reviewed scientific papers for way longer than I’ve been blogging about optics. I value significant numerical information presented with methods that allow reproducibility as much as anybody. But way too many people who can’t define either spurious accuracy or spurious resolution believe (and unfortunately create) nonsense numbers on the internet and repeat them as though they mean something. So […]

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Things You Didn’t Want to Know About Zoom Lenses

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The intersection (perhaps collision is a better word) of art and science is interesting. The scientist says “your impression is not as important as my facts.” The artists say “my impression is all that matters.” Imaging is that way. The photographer or videographer getting the look he wants from a piece of equipment is all that […]

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Third Party Ultra-Wide Lenses MTF Comparison

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Contrary to what most people believe, we do pay some attention when people ask us to do MTF testing on certain lenses. I’m not saying we do it, but we do pay attention to the requests and when we have some downtime will look at that request lists and see if there’s something on it […]

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