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[器材讨论] CP+结束了,看看佳能R1传递出什么信息。

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发表于 2021-3-1 10:03 |显示全部楼层
5 things the Canon EOS R1 needs to compete with the Sony A1

By Dan Mold, James Artaius January 29, 2021

After the bombshell of the Sony A1, what does the Canon EOS R1 have to do to keep up?

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(Our artist's impression of the Canon EOS R1)The new flagship Canon EOS R1 is rumored to be announced this year, ahead of the Tokyo Olympic Games. Meanwhile Sony is due to start shipping its brand-new full-frame mirrorless camera, the A1, in the next few months.

This means that the Sony A1 will get a head start on the Canon EOS R1, so here we’re going to look at the five things that Canon is going to need to incorporate in its new camera in order to compete with Sony's new juggernaut.
In the short term it will be the Canon EOS R5, its current top-flight mirrorless model, going toe-to-toe with the A1. And while it has a slightly lower resolution (45Mp against 50.1Mp) and only 20fps compared to the Sony’s 30fps, the R5 does have substantially more autofocus points and in-body stabilization that offers an 8 stop advantage rather than Sony’s 5.5 – so it's a surprisingly even fight.
• Read more: Sony A1 vs Canon EOS R5
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However, with plenty of time on Canon’s side to squeeze as much cutting-edge tech into its next camera as possible, here's what the Canon EOS R1 will need in order to leave the Sony A1 in the dust…

1) Global shutter… or improved resolution
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Canon has two options here: does it outfit the R1 with the rumored new global shutter sensor at a cost to resolution, or does it repurpose the 45MP sensor from the R5… or even push the pixel count even higher?
With the Sony A1 having a 50.1MP sensor, the benchmark has been set and Canon will need to do something special to meet the challenge. On the one hand, a global shutter sensor would be limited to around 21MP due to the nature of the technology. However, a global shutter would theoretically enable the camera to exceed the A1's 30fps continuous shooting speed and eliminate rolling shutter – which is arguably far more important, for a professional camera.
Of course, 20.1MP – while the accepted resolution of professional cameras like the Canon EOS-1D X Mark III – looks incredibly conservative compared to the A1's pixel power. This could be a way to differentiate the R1 as an speed demon, with the R5 as Canon's pixel powerhouse, but the manufacturer might prefer to max out the resolution of its new flagship.
In this case it could repurpose the 45MP R5 sensor – perhaps adding something like a low-pass filter, as featured on the 1D X Mark III – or we could even see the long-rumored 90MP sensor with 300MP pixel shift shooting.
2) 9-stop stabilization
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We’ve already got fantastic in-body image stabilization (IBIS) in the R5 and Canon EOS R6, offering sharp shots at up to shutter speeds 8 stops slower than would normally be possible when used in conjunction with a number of RF-mount lenses. This would be a key area in which that the R1 has an advantage over the maximum 5.5 stops of stabilization in the Sony A1.
Indeed, with even the Fujifilm GFX 100S offering 6-stop IBIS as standard, it's possible that Canon could push the boat out and reach the 6-stop watermark for the EOS R1 – which could push the total stabilization to 9 stops with the supported lenses.
3) Better cooling
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We would hope that Canon learns from the disappointment users faced with the R5 and R6 overheating upon launch. A prolonged cooling-down period is required after a requisite amount of time shooting 4K and 8K video, rather than this being based on the actual internal temperature of the camera.
This was addressed to some degree with recent firmware updates, and users can now shoot for longer periods, with cooldown periods now seemingly only triggered when the internal temperature becomes too high – and it doesn't need to cool down for so long, either.
Regardless, we’d like to see these problems ironed out from the off with the A1 – and that means a better thermal design to dissipate heat more efficiently from hot spots like the camera sensor. Could the R1 be Canon's first consumer camera to feature an internal fan, or some sort of active cooling to keep temperatures down? It would certainly have room for it in what we expect to be a larger body.
4) Pro body, build, battery
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Top-flight DSLRs are renowned for being built like tanks, and being able to handle the abuse that professional sports and wildlife photographers can throw at them. To be a true successor to Canon's EOS-1D X line, the EOS R1 won't be able to scrimp on this feature; it will need to be rock solid, weather sealed and feature the built-in vertical grip that makes it easy to shoot in landscape and portrait orientations.
That vertical grip would also provide space to fit a much larger Li-Ion battery, which would be required to better the 530 shots using the LCD screen (430 shots with the electronic viewfinder) of the Sony A1. Battery life has always been a point of contention with mirrorless cameras, so having a much larger, powerful battery comparable to that of the 1DX Mark III could be a game changer (as the LCD, EVF and IBIS are all power-hungry).
5) Quad Pixel AF
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(Image credit: Canon / JPO)

The autofocus on the Canon EOS R5 already blew us away with its incredible speed and accuracy, as well as brilliant face and eye detection – which works amazingly well on both people and animals (and we already know that the Sony A1 doesn't support bird eye AF in movie mode).
This was possible due to the implementation of Canon's latest iteration of its AF technology, Dual Pixel CMOS AF II, which employs dedicated left-looking and right-looking pixels on the sensor to calculate whether an image is in focus or not.
However, we suspect that the Canon EOS R1 might benefit the long-rumored (and already patented) Quad Pixel CMOS AF, with up to 83 million AF detection points. Having four 'sub-pixels' per photosite would theoretically mean that a camera would be able to lock onto high-contrast areas (without the hybrid phase detect / contrast detect system) no matter what the orientation of the camera or subject.
Couple that with further refinement of Canon's Deep Learning AF, and we could be looking at the most accurate autofocus system we've ever witnessed.


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发表于 2021-3-1 10:16 |显示全部楼层

在索尼发布了α1重磅炸弹之后,佳能EOS R1必须做什么才能予以抗衡?

译文:琴剑光影


  消息称新旗舰佳能EOS R1将于今年东京奥运会之前宣布。 这意味着索尼α1将在佳能发布EOS R1上抢占先机,因此佳能在其新相机中必须包含这五项功能,才能与索尼α1进行抗争。

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  目前与索尼α1抗争的机型是佳能的R5,它是当前的顶级全画幅微单型号与α1有着许多类似的性能。尽管与索尼的5000万像素相比,分辨率略低4500万像素,与索尼的连拍速度30fps相比,仅为20fps,但R5具有更多的自动对焦点和更强大的机身稳定功能,拥有8档稳定性,索尼只有5.5档。同时佳能是8K30P422,10bit,索尼是8K30P420,10bit因此在某种意义上有点势均力敌的感觉。那么未来的佳能R1需要在哪5个方面来超越索尼呢?

  一、全局快门或更高的分辨率

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  佳能在这里有两个选择:它是在传闻中为R1配备传闻中的新的全球快门传感器,还是要以降低分辨率为代价,还是要从R5中重新使用45MP传感器……甚至将像素数推高?

  索尼A1具有50.1MP传感器,因此已经设定了基准,佳能将需要做一些特殊的事情来应对挑战。一方面,由于技术的原因全局快门传感器很难超过2100万像素。但是,从理论上讲,全局快门可以使相机超过α1的30fps连拍速度,并消除滚动快门形成的失真。对于专业相机而言,消除滚动快门可能更为重要。

  当然,如果采用2100万像素与索尼α1的像素能力相比显得太过保守。制造商可能更愿意最大限度地发挥其新旗舰产品的分辨率。

  在这种情况下,佳能可能会使用传闻已久的90MP传感器具有3亿像素位移成像。

  二、9档机身稳定

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  R5和佳能 R6中已经具有出色的体内图像稳定(IBIS)功能,可以在较低快门速度的情况下提供清晰的拍摄效果,与许多RF固定镜头配合使用时,其速度比通常情况下慢了8级 。这将是R1优于Sony A1的最大5.5级稳定位的关键领域。富士胶片GFX 100S标准提供6档IBIS,佳能也有可能突破这个限制,可以通过支持的镜头将总稳定度提高到9档。

  三、散热效果更好

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  希望佳能能够从用户对R5和R6推出时出现过热的失望中汲取教训。在拍摄4K和8K视频减少过热的发生,增加拍摄时间。 (最近的固件更新已在某种程度上解决了这一问题,用户现在可以拍摄更长的时间,而冷却时间似乎仅在内部温度过高时才触发–而且也不需要冷却那么长时间。)

  无论如何希望看到这些问题都可以在R1上得以消除,这意味着更好的散热设计可以更有效地散热,例如摄像机传感器。或许R1是佳能首款内置风扇的家用相机,还是某种主动降温以降低温度的相机?

  四、专业的机身,专业的电池

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  顶级数码单反相机以像坦克一样坚固的机身而闻名,并能够应对专业体育和野生动物摄影师野蛮使用,以达到真正替代佳能EOS-1D X系列。它将需要坚如磐石,防风雨并且具有内置的垂直握把,使其易于以横向和纵向拍摄。

  垂直握把还可以提供空间,以容纳更大的锂电池。索尼α1的LCD屏幕可拍摄530张照片(使用电子取景器可拍摄430张照片)。电池寿命一直是微单相机的争论焦点,因此拥有比1DX Mark III更大,更强大的电池可能会改变 微单的规则。

  五、四像素自动对焦

6.jpg


  佳能EOS R5的自动对焦已经以其令人难以置信的速度和准确性以及出色的面部和眼睛检测功能在人和动物上都有极为出色的表现(索尼 α1不支持鸟类电影模式下的眼睛自动对焦)。

  佳能实现了其AF技术的最新迭代,即Dual Pixel CMOS AF II,该技术在传感器上采用了专用的左眼和右眼像素来计算图像是否对焦。

  但是佳能EOS R1可能会使用Quad Pixel CMOS AF,其AF检测点多达8300万。从理论上讲,每个光点具有四个“子像素”将意味着无论相机或对象的方向如何,相机都可以锁定在高对比度区域(无需混合相位检测/对比度检测系统)。 加上佳能深度学习自动对焦的进一步完善,实现最精确的自动对焦系统。
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发表于 2021-3-1 10:21 |显示全部楼层
原文中有一段视频,我下载了,不知怎么传。
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发表于 2021-3-1 10:34 |显示全部楼层
普及一下什么是拜尔膜
https://www.birdnet.cn/forum.php ... &fromuid=184919

解读常见传感器的CFA排列
https://www.birdnet.cn/forum.php ... &fromuid=184919

独门秘籍一一 Foveon X3传感器
https://www.birdnet.cn/forum.php ... &fromuid=184919

佳能2013年也申请过类似Foveon X3的技术专利
https://www.birdnet.cn/forum.php ... &fromuid=184919





补充内容 (2021-3-1 17:16):
佳能划时代产品-R1
https://www.birdnet.cn/forum.php ... &fromuid=184919
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发表于 2021-3-1 17:39 |显示全部楼层
佳能还是避而不谈拜尔膜问题,只有取消拜尔膜,无反照像机无年才会到来。

现在的无反只是把单反的底装在摄像机上,把摄像机做成单反外形。在这方面佳能、索尼、松下、JVC等有优势,而尼康没做过摄像机,所以尼康显得劣势。

215607d03wh8x3vvoz8lwc.jpg

图中111、112是低通镜和拜尔膜,文中提到R1四像素底取消了低通滤镜。但,拜尔膜问题未能解决。

由于无反无反光镜,因此感光底长时间处于光照中,如遇强光,容易伤及拜尔膜。重者烧毁,轻者损伤,长时间开机使感光底老化加速。

因此,R1解决了上述5项,最重要的并未解决,所以无反元年尚未到来。

《佳能高管谈中国相机市场:无反相机接受度高,用户愿以高价格换取高性能产品》
https://www.birdnet.cn/forum.php?mod=viewthread&tid=5012341&fromuid=184919
上述一文中提无反和单反在中国销售比例1:1,而全球无反和单反销售比例为2:8。由此推算-无反基本卖给中国人。



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发表于 2021-3-3 09:33 |显示全部楼层
提供的信息很值得期待,感谢。根据国际测评机构对A1和R5高感的测评结果,无论是高感还是低感都比R5差很多,失望。
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发表于 2021-3-5 08:33 |显示全部楼层

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发表于 2021-3-10 19:15 |显示全部楼层

2111447_1615349221434.jpg
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从R1和Z9公开的参数看-Z9不如R1

叠层底让人遐想

https://www.birdnet.cn/forum.php?mod=viewthread&tid=5083370&fromuid=184919



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