a7S

a7S与a7RII转接镜头的边角像场弯曲问题的简单AB对比

刚刚做了一个非常简单的 A/B 对比。这个结果似乎验证了之前一直传闻的因为换用背照式 CMOS a7RII 的边角失焦问题会相比早期的 a7 系列有所改善的流言。而从技术上来说,这一流言不太像是真的,除非 SONY 为了做背照式 CMOS 真的削薄了 CMOS 的前滤镜。

因为只是单次的简单测试,这个结果也可能是误差所致。如果有时间我会再在其他场景中重复几次。

镜头用的是 C Biogon T* 4.5/21 ZM,距离一米。

a7S Upper Left Corner

a7S Upper Left Corner

a7R2 Upper Left Corner

a7R2 Upper Left Corner

a7S Upper Right Corner

a7S Upper Right Corner

a7R2 Upper Right Corner

a7R2 Upper Right Corner

Simple A/B Comparison between a7S and a7RII about Adapting RF Lenses

Just did a very simple A/B comparison. The result seemed to support the myth about a7RII has less “field curvature” problem than previous a7 series, which should make no sense unless SONY did thin the glass in front of the senser.

It’s just a single quick test so it can be inaccurate. If have time I’ll repeat it in different scenes.

The lens in this test is a Zeiss C Biogon T* 4.5/21 ZM. Distance is 1m.

a7S Upper Left Corner

a7S Upper Left Corner

a7R2 Upper Left Corner

a7R2 Upper Left Corner

a7S Upper Right Corner

a7S Upper Right Corner

a7R2 Upper Right Corner

a7R2 Upper Right Corner