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Does wider zoom range mean lower image quality?
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<blockquote data-quote="Snowcat" data-source="post: 644270" data-attributes="member: 44121"><p>Multiple measurements using ONE copy of the lens are rather useless. Good result can be achieved if they measure multiple copies or the same lens, which nobody does I am pretty sure. Even leading resources like DPreview and photozone usually have only one copy of the lens. While fluctuations or quality from one copy to another can be GREAT. For example, when I tried to get a Canon 24-105/4 L lens for my Sony camera, I bought it from 12th (TWELVE) try only! Most of the copies of this lens (used AND new) have terrible IQ, I was surprised with how big the fluctuations are and how often they occur among this lens copies.</p><p></p><p>Another example, with Nikon this time. I've bought a Nikon AF-P 10-24 lens. It was awful, really-really awful IQ-wise. It's microcontrast is very poor so all greenery in the distance is turned into a green mass. I've tested it on 18mm against my Sigma 17-70 and Sigma 18-300 and Nikon 10-24 was the worst of them (17-70 was the best)! So, it has the smallest zoom range of them all and it has worst IQ of them all. I even brought it to Nikon, they've tested it and said that it performs as it should. And added that for this cheap lens it is normal to have such a low microcontrast. In the end I've sold it and got a used Tokina 12-24 which is a much better lens.</p><p></p><p>My personal experience shows me that there is no clear link between zoom range and IQ. There are way too many exceptions to consider this as a rule.</p></blockquote><p></p>
[QUOTE="Snowcat, post: 644270, member: 44121"] Multiple measurements using ONE copy of the lens are rather useless. Good result can be achieved if they measure multiple copies or the same lens, which nobody does I am pretty sure. Even leading resources like DPreview and photozone usually have only one copy of the lens. While fluctuations or quality from one copy to another can be GREAT. For example, when I tried to get a Canon 24-105/4 L lens for my Sony camera, I bought it from 12th (TWELVE) try only! Most of the copies of this lens (used AND new) have terrible IQ, I was surprised with how big the fluctuations are and how often they occur among this lens copies. Another example, with Nikon this time. I've bought a Nikon AF-P 10-24 lens. It was awful, really-really awful IQ-wise. It's microcontrast is very poor so all greenery in the distance is turned into a green mass. I've tested it on 18mm against my Sigma 17-70 and Sigma 18-300 and Nikon 10-24 was the worst of them (17-70 was the best)! So, it has the smallest zoom range of them all and it has worst IQ of them all. I even brought it to Nikon, they've tested it and said that it performs as it should. And added that for this cheap lens it is normal to have such a low microcontrast. In the end I've sold it and got a used Tokina 12-24 which is a much better lens. My personal experience shows me that there is no clear link between zoom range and IQ. There are way too many exceptions to consider this as a rule. [/QUOTE]
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Does wider zoom range mean lower image quality?
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