富士1亿像素中画幅GFX100的动态范围测量数据

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[1 楼] nasa5000 [泡菜] 19-6-6 12:23 由于Fujifilm GFX100的动态范围测量数据被添加到Photons to Photos中，与其他中画幅相机和全尺寸无反相比较。 GFX100与GFX 50S，645Z的比较 GFX100与全尺寸无反光镜高像素机（Z7，S1R，α7RIII）的比较 GFX100传感器只是最新的传感器，与一代以前的50MP中型传感器相比，动态范围似乎略有改善。此外，在将动态范围与全尺寸无反光镜高像素机器进行比较时，GFX100的动态范围在任何ISO感光度下都很宽，而且似乎大型 GFX100传感器具有优势。
[36 楼] nadiawu [泡菜] 20-6-10 19:09 t_dj 发表于 2020-6-10 17:40 我觉得前照式的后背还是过时了，看过云漫大师对后背的评测，前照式后背的各种红移、莫名其妙的杂色，虽然动态范围大一些，但如果用起来有太多不便了，后照式后背就没有这个问题了。嗯，前年1.51亿背照式底的后背出来后，各种骚操作也用上了。背照式的提升真的很大。
[35 楼] nadiawu [泡菜] 20-6-10 19:08 糊沫终结者发表于 2020-6-10 15:48 也未必，别迷信5440的底了，实际画质也未必比1亿像素的4433画幅好，看看富士1亿像素与飞思1亿像素的对比吧：嗯，看过这个图。实际出片因素很多，包括飞思那套系统的镜头，一些蓝拳粉圈的看着贵，但结构还是古董级的，遇到最新的传感器，不见得很好，反而会出莫名其妙的问题。但那张动态范围的图看来，老1亿像素全幅645的底虽是前照式的，但还是下了料的东西。
[34 楼] t_dj [陈年泡菜] 20-6-10 17:40 nadiawu 发表于 2020-06-10 10:22 5440的全幅645强出这么多，比4433强出的幅度，大于4433对135顶级画质机强出的幅度，而且上代飞思1亿像素还是前照式技术，看来... 我觉得前照式的后背还是过时了，看过云漫大师对后背的评测，前照式后背的各种红移、莫名其妙的杂色，虽然动态范围大一些，但如果用起来有太多不便了，后照式后背就没有这个问题了。本帖由色影无忌论坛小程序发布
[33 楼] 糊沫终结者 [禁言中] 20-6-10 15:48 nadiawu 发表于 2020-6-10 02:19 全幅645竟然强这么多。也未必，别迷信5440的底了，实际画质也未必比1亿像素的4433画幅好，看看富士1亿像素与飞思1亿像素的对比吧：
[32 楼] 叁柒 [陈年泡菜] 20-6-10 10:27 nadiawu 发表于 2019-6-6 23:42 可以期待富士后期推送新固件增加超解模式后进一步提高画质。 A7RIII也是背照式，而且说起来GFX100像素密度更高，相当于全幅6000万像素，居然高感还好于A7RIII。居然50R高感比50S要好一点。。。
[31 楼] nadiawu [泡菜] 20-6-10 10:22 camson 发表于 2019-6-6 12:48 .. 5440的全幅645强出这么多，比4433强出的幅度，大于4433对135顶级画质机强出的幅度，而且上代飞思1亿像素还是前照式技术，看来贵还是有贵的道理的。这样看，宾得出5440的可能性真的不大了，真要做，要拿出很大魄力的。
[30 楼] t_dj [陈年泡菜] 20-6-10 06:14 酥哥好色发表于 2019-06-07 00:18 这不科学啊，按照某种理论，GFX100像素最小，高感应该最差。事实却相反，跪求解答。我以前也有此疑惑，后来一想可能是因为100是16bit的原因。本帖由IOS客户端发布
[29 楼] nadiawu [泡菜] 20-6-10 02:19 全幅645竟然强这么多。
[28 楼] camson [禁言中] 19-6-7 22:05 ISO100, 100看图
[27 楼] camson [禁言中] 19-6-7 22:03 ISO100, PRINT[8MP]
[26 楼] camson [禁言中] 19-6-7 22:00 PRINT[8MP]看图
[25 楼] camson [禁言中] 19-6-7 21:56 高感, 100%看图
[24 楼] camson [禁言中] 19-6-7 21:51 高感, 100%看图
[23 楼] camson [禁言中] 19-6-7 10:22 酥哥好色发表于 2019-6-7 00:18 这不科学啊，按照某种理论，GFX100像素最小，高感应该最差。事实却相反，跪求解答。 cmos技术不一样。背照式作用之一是改善了高感。
[22 楼] nadiawu [泡菜] 19-6-7 06:36 camson 发表于 2019-6-6 23:52 提到双增益, Z7 D850好象也是. ISO800处有拐点, 曲线形态相象. ---------------- Digging a little deeper, it's a backside-illuminated design, which maximizes the region of each pixel that's light-sensitive but also pushes the light-sensitive area closer to the top of the sensor. This can improve performance at the corners of the chip, where light can be arriving at very shallow angles. Most significantly, the chip uses a dual gain design. This has pixels with two modes, switching to a higher level of in-pixel gain at high ISOs; this reduces the noise level in low light images, at the cost of a slight reduction in dynamic range. In many respects, the GFX100's chip resembles four X-T3 sensors placed next to one another, which is likely to mean it's similarly up-to-date in terms of its design and, we'd expect, its performance. 16-bit is unlikely to make a significant difference in the real world The sensor in the GFX 100 is also one of the first we've seen able to output 16-bit files. This is u ... 是的。
[21 楼] SD1F [泡菜] 19-6-7 01:10 酥哥好色发表于 2019-6-7 00:24 以前以为，GFX50R是GFX50S的简化版，现在看来，功能虽然简化，但性能不妥协。 gfx50s没有蓝牙，是50R的阉割版
[20 楼] 酥哥好色 [泡菜] 19-6-7 00:24 以前以为，GFX50R是GFX50S的简化版，现在看来，功能虽然简化，但性能不妥协。
[19 楼] 酥哥好色 [泡菜] 19-6-7 00:18 这不科学啊，按照某种理论，GFX100像素最小，高感应该最差。事实却相反，跪求解答。
[18 楼] camson [禁言中] 19-6-6 23:55 nadiawu 发表于 2019-6-6 23:42 可以期待富士后期推送新固件增加超解模式后进一步提高画质。 A7RIII也是背照式，而且说起来GFX100像素密度更高，相当于全幅6000万像素，居然高感还好于A7RIII。从前面的片看, A7R3明显差距不小.
[17 楼] camson [禁言中] 19-6-6 23:52 nadiawu 发表于 2019-6-6 23:42 可以期待富士后期推送新固件增加超解模式后进一步提高画质。 A7RIII也是背照式，而且说起来GFX100像素密度更高，相当于全幅6000万像素，居然高感还好于A7RIII。提到双增益, Z7 D850好象也是. ISO800处有拐点, 曲线形态相象. ---------------- Digging a little deeper, it's a backside-illuminated design, which maximizes the region of each pixel that's light-sensitive but also pushes the light-sensitive area closer to the top of the sensor. This can improve performance at the corners of the chip, where light can be arriving at very shallow angles. Most significantly, the chip uses a dual gain design. This has pixels with two modes, switching to a higher level of in-pixel gain at high ISOs; this reduces the noise level in low light images, at the cost of a slight reduction in dynamic range. In many respects, the GFX100's chip resembles four X-T3 sensors placed next to one another, which is likely to mean it's similarly up-to-date in terms of its design and, we'd expect, its performance. 16-bit is unlikely to make a significant difference in the real world The sensor in the GFX 100 is also one of the first we've seen able to output 16-bit files. This is unlikely to make a significant difference in the real world and our early investigations support this. Raw files are linear, so devote most of their values to the brightest tones but, counter intuitively, the brightest tones are the ones with the highest magnitude noise, so you risk encoding noisy data with more precision than makes sense. You might gain an increase in performance if the very deepest shadows, but only if the sensor itself has low-enough read noise for there to be meaningful data to store there. --------------
[16 楼] camson [禁言中] 19-6-6 23:45 nadiawu 发表于 2019-6-6 23:42 可以期待富士后期推送新固件增加超解模式后进一步提高画质。 A7RIII也是背照式，而且说起来GFX100像素密度更高，相当于全幅6000万像素，居然高感还好于A7RIII。 DPR说这些片是量产前的机器拍的. 如下. --------------- Fujifilm's GFX 100 is equipped with an all-new, 100MP backside-illuminated CMOS sensor with dual-gain architecture. Not only does this sensor offer outstanding resolution, it also promises to exceed the capabilities of today's best full-frame cameras when it comes to high ISO image quality and Raw dynamic range. We've been shooting with a pre-production GFX 100 with near-final firmware for a while now, and as part of our ongoing review we've updated our studio scene database so you can see how it compares. Please note that these images may be replaced when we have access to final firmware and / or a final shipping sample of the GFX 100 in the coming weeks. Images shot using a pre-production Fujifilm GFX 100 and published with permission. Image quality may not exactly represent exactly the output from final shipping cameras but is likely to be extremely close.
[15 楼] nadiawu [泡菜] 19-6-6 23:42 camson 发表于 2019-6-6 22:17 DPR有测试片了, 高感好于50S/50R. 缩图到50S/R同尺寸的比较. 可以期待富士后期推送新固件增加超解模式后进一步提高画质。 A7RIII也是背照式，而且说起来GFX100像素密度更高，相当于全幅6000万像素，居然高感还好于A7RIII。
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