loxia 21 2.8是全新设计的逆望远结构！

q67解决的是分辨率问题，下一代不知道会不会下放，反正现在都是拼像素的时代，除了视频以外q67的意义说大也不大。

中画幅目前还是以画面纯净度优先，那么高的像素，优化不好就浪费了，飞思自己在280和260之间也还是推荐260，因为长曝光下画面纯净度有保证。

X3专利在适马手里。听说佳能现在溢价七倍想收购适马。其用意就是想在未来避开与索尼在马赛克传感器领域的正面竞争，因为在这一技术领域他已经落后索尼太多太多了。而同时他也可以利用适马的品牌来生产索尼卡口的镜头，变相通过索尼的成功来获利。

我觉得你别想太多了，大法做事还是有点底限的，第一部8k不做到完美符合rec.2020标准的话，更低规格的机器就别想出来，欠采样8k都不可能

中幅欠采样最后拍出来和手机差不多还有什么意义

什么时候刷A口机身！ 等的都淡然了……

这次7枚镜头落空了，希望下次发布吧

大法即将发布7枚镜头！

中画幅还要玩8K视频？这也太丧心病狂了
更关心啥时候出全画幅的堆叠式CMOS

蛋疼下，DPReview最终会给A7RII打多少分？
看DP关于A7RII的内容，几乎都是正面的。
btw： 目前最高分是D750 90分

有损格式确实不利于动态，iso640左右的动态提高是真的

Interesting info from Sony at Dpreview: Claims BSI indeed improves performance on third party wide angle lenses.

There is a closer look at the Sony a7R II by Dpreview that unveils a couple of interesting info:

    1) Something we think is very interesting is Sony’s claim that, due to the effective increase in lateral space for the active pixel area from going backside-illuminated (BSI), pixels are able to receive more oblique light rays, which helps with issues like extreme vignetting and color shifts at the peripheries of the image.
    The current design in the a7R II should allow for high resolution (small pixels) and the ability to accept very oblique light rays – particularly important for legacy glass that has an exit pupil located very close to the sensor. This ability essentially makes the sensors more ‘film like': film avoided many of these issues by having an essentially flat, 2D structure with very little depth.

    2) The faster sensor in the a7R II allows it to reset all 42 million photosites fast at the start of the exposure, meaning the mechanical shutter doesn’t even need to be used at the start of your exposure.

    3) So what’s the big deal? Electronic front curtain plus no mirror is the big deal. No moving parts around the sensor means you don’t have to worry about keeping your shutter speeds high to make use of the full potential of all of those pixels. And on top of that, you’ve got in-body image stabilization (IBIS) to stabilize things for you further. And no shutter movement at the beginning of your exposure either, so nothing sudden for the image stabilization system to respond to and make matters worse.

    4) Dual-gain implementation like the one found on the a7S exists in the a7R II. This architecture essentially boosts the signal even more, at around ISO 640 on the a7R II (and at 1600 in the a7S), really early on in the signal pathway, to ensure that any noise added by the camera has minimal effect on the (now ‘louder’) signal. This essentially means increased dynamic range at higher ISOs

    5) The Sony RAW compression can limit dynamic range: The posterization artifacts are due to Sony’s lossy compression, which you can read more about in Iliah Borg’s excellent study here. You’ll also see in Iliah’s article that this can particularly be an issue with star(trail) shots, which tend to have sharp, high contrast transitions.

    6) Sony claims a 40% increase in AF response compared to the original Alpha 7R, in particular because of faster contrast-detect AF, but we actually think this estimate is underselling the capabilities of the a7R II. Considering the accuracy of focal plane AF points, which is far higher than most AF points of DSLRs, the ability of the a7R II to focus quickly and continuously is no small matter.

    7) Eye AF is potentially game-changing for wedding photography, newborn photography, and generally photojournalistic and candid photography where you need to react to a subject quickly. Combine this with the focus accuracy of on-sensor AF implementations, and you have a usable way of instantaneously and accurately focusing on the eye of a subject, even at 35mm F2

啥时候出x3啊.

什么时候发布a7s2？

QE是对特定频率来说的，硅传感器对长波光的吸收是逐渐降低到完全不吸收的。报道上看这个传感器扩展了吸收带宽，尤其红外部分到3um，说的应该就是这个。