sigma 150-500 or tamron 200-500 with A77?

Started May 15, 2012 | Discussions thread
tbcass
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Re: pot, kettle, black
In reply to seilerbird666, May 20, 2012

seilerbird666 wrote:

IF the 70-400 is so much sharper why can't anyone supply the photographic proof. All it takes is one sharp photo to shut me up.

Quite frankly I doubt there is a significant difference between the two. People assume that it must have better IQ just because it is a lot more expensive. The fact is it is a lot more expensive to produce a 70-400 lens than a 70-300 and maintain the same IQ. Prime lenses are simpler, cheaper and tend to have better IQ. All things being equal more zoom means more complexity and more lens elements which tends to mean less IQ quality not more. To have the same IQ would require a more expensive design and manufacturing process.

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