p********e
发帖数: 16048 | 1 a moon is around 1 degree in angle
suppose we are using 135 system
sensor is 36x24
if we want to get a moon with diameter 24mm on film
we need
24 pi |
z****6
发帖数: 10776 | 2 Canon有1200mm的
【在 p********e 的大作中提到】
: a moon is around 1 degree in angle
: suppose we are using 135 system
: sensor is 36x24
: if we want to get a moon with diameter 24mm on film
: we need
: 24 pi
|
w****n
发帖数: 5749 | 3 不是这样算的吧，镜头都有视角放大率的
【在 p********e 的大作中提到】
: a moon is around 1 degree in angle
: suppose we are using 135 system
: sensor is 36x24
: if we want to get a moon with diameter 24mm on film
: we need
: 24 pi
|
p********e
发帖数: 16048 | 4 there for using a 24-105 lens or 70-200 lens is impossible to shoot the moon
less bad when using 2x extender
a moon is around 1 degree in angle
suppose we are using 135 system
sensor is 36x24
if we want to get a moon with diameter 24mm on film
we need
24 pi
【在 p********e 的大作中提到】
: a moon is around 1 degree in angle
: suppose we are using 135 system
: sensor is 36x24
: if we want to get a moon with diameter 24mm on film
: we need
: 24 pi
|
N**D
发帖数: 10322 | 5 10.5mm fisheye
【在 p********e 的大作中提到】
: a moon is around 1 degree in angle
: suppose we are using 135 system
: sensor is 36x24
: if we want to get a moon with diameter 24mm on film
: we need
: 24 pi
|
t*r
发帖数: 101 | 6 用什么lens啊
google一下就行了
【在 p********e 的大作中提到】
: a moon is around 1 degree in angle
: suppose we are using 135 system
: sensor is 36x24
: if we want to get a moon with diameter 24mm on film
: we need
: 24 pi
|
w**********e
发帖数: 2063 | 7 or 8mm
【在 N**D 的大作中提到】
: 10.5mm fisheye
|
s*******g
发帖数: 3332 | 8 问少是学数学的？
【在 p********e 的大作中提到】
: a moon is around 1 degree in angle
: suppose we are using 135 system
: sensor is 36x24
: if we want to get a moon with diameter 24mm on film
: we need
: 24 pi
|
|
N**D
发帖数: 10322 | 9 望远镜啊，刚才用10倍那个看，据清楚，比拍出来的强多了
moon
【在 p********e 的大作中提到】
: there for using a 24-105 lens or 70-200 lens is impossible to shoot the moon
: less bad when using 2x extender
:
: a moon is around 1 degree in angle
: suppose we are using 135 system
: sensor is 36x24
: if we want to get a moon with diameter 24mm on film
: we need
: 24 pi
|
