G**Y
发帖数: 33224 | 1 D800E - 'cancellation' of anti-aliasing filter
Nikon uses slightly curious wording about the D800E - that the anti-aliasing
effect of the optical filter stack in front of the sensor is 'cancelled' -
and the diagram below shows what this means (courtesy of Nikon). Anti-
aliasing filters work by using a birefringent material to split light rays
into two based upon the polarization of the light; a first layer splits it
horizontally, the second vertically. The practical result is a slight
blurring of the image, to avoid moiré and aliasing artefacts. In the case
of the D800E, the first filter is instead directly counteracted by the
second, resulting in no overall blurring. |
R***a
发帖数: 41892 | 2 这是为了justify为啥去掉个成本很高的东西价钱加了10%。
实际上把那两块低通换成两篇玻璃也一样
aliasing
-
【在 G**Y 的大作中提到】
: D800E - 'cancellation' of anti-aliasing filter
: Nikon uses slightly curious wording about the D800E - that the anti-aliasing
: effect of the optical filter stack in front of the sensor is 'cancelled' -
: and the diagram below shows what this means (courtesy of Nikon). Anti-
: aliasing filters work by using a birefringent material to split light rays
: into two based upon the polarization of the light; a first layer splits it
: horizontally, the second vertically. The practical result is a slight
: blurring of the image, to avoid moiré and aliasing artefacts. In the case
: of the D800E, the first filter is instead directly counteracted by the
: second, resulting in no overall blurring.
|
d*****0
发帖数: 68029 | |
G**Y
发帖数: 33224 | 4 绒毛控
【在 d*****0 的大作中提到】
: 这个东西对丝袜控会有影响
|
f****k
发帖数: 1231 | |
a*********a
发帖数: 3656 | 6 that is a strange way to do things and leaves 2 unessary surface boundaries
light has to pass through.
【在 f****k 的大作中提到】
: detail explanation is here:
: http://www.imaging-resource.com/PRODS/nikon-d800/nikon-d800A.HT
|
w****n
发帖数: 5749 | |
R***a
发帖数: 41892 | 8 如果完全没有玻璃，需要完全新开生产线，因为对焦取景机构的校准的完全重做。
为了成本，显然还是保留两块玻璃的好。而且也可以压制一下为啥少了东西反而更贵的
疑问
boundaries
【在 a*********a 的大作中提到】
: that is a strange way to do things and leaves 2 unessary surface boundaries
: light has to pass through.
|
x5
发帖数: 27871 | 9 如果前面那块能转的话，就会比较有意思了，不过做起来成本太高
【在 R***a 的大作中提到】
: 如果完全没有玻璃，需要完全新开生产线，因为对焦取景机构的校准的完全重做。
: 为了成本，显然还是保留两块玻璃的好。而且也可以压制一下为啥少了东西反而更贵的
: 疑问
:
: boundaries
|
a*********a
发帖数: 3656 | 10 对焦，取景光路并不经过那里啊？
【在 R***a 的大作中提到】
: 如果完全没有玻璃，需要完全新开生产线，因为对焦取景机构的校准的完全重做。
: 为了成本，显然还是保留两块玻璃的好。而且也可以压制一下为啥少了东西反而更贵的
: 疑问
:
: boundaries
|
w****n
发帖数: 5749 | 11 那为啥不直接用普通玻璃？
【在 R***a 的大作中提到】
: 如果完全没有玻璃，需要完全新开生产线，因为对焦取景机构的校准的完全重做。
: 为了成本，显然还是保留两块玻璃的好。而且也可以压制一下为啥少了东西反而更贵的
: 疑问
:
: boundaries
|
R***a
发帖数: 41892 | 12 就是因为不过才要校准啊。革命机啥时候需要对焦取景校准了？
绝对的100% 取景啊。
【在 a*********a 的大作中提到】
: 对焦，取景光路并不经过那里啊？
|
w****n
发帖数: 5749 | |
a*********a
发帖数: 3656 | 14 oh, I understand what you mean now, make sense. I d rather they do IR + glass twice as thick as the LP. or better, like you side, shimming the base of the sensor.
【在 R***a 的大作中提到】
: 就是因为不过才要校准啊。革命机啥时候需要对焦取景校准了？
: 绝对的100% 取景啊。
|
