x*******3
发帖数: 8342 | 1 35L f/1.4 LII
Canon files patent for EF 35 f/1.4L II
Patent Publication No. US 7,944,625
Published 2011.5.17
Filled 2009.8.5
Specifications
Focal Distance: 34.59
Fno: 1.45
Half angle of view: 32.02
Image Height: 21.64
Lens Length (mm): 126.93
Back Focus (mm): 37.98
50 1.4, why not mark II?????
Canon patent for EF 50 f/1.4 USM
Patent Publication No. 2011-70032
Published 2011.4.7
Filled 2009.9.25
Specifications
Focal Distance: 51.70
Fno: 1.30
Half angle of view: 22.79
Image Height: 21.64
Lens Length (mm): 98
Back Focus (mm): 37.5
Aspherical: 2
340 IS L II
Canon patent for EF 300 f/4L IS II
Patent Publication No. 2011-70032
Published 2011.4.7
Filled 2009.9.25
Specifications
Focal Distance: 294
Fno: 4.14
Half angle of view:4.08
Image Height: 21.64
Lens Length (mm): 225
Back Focus (mm): 83.12
Aspherical: 1
24 2.8
Canon patent for EF 24 f/2.8 USM
Patent Publication No. 2011-70032
Published 2011.4.7
Filled 2009.9.25
Specifications
Focal Distance: 24.48
Fno: 2.86
Half angle of view:38.26
Image Height: 21.64
Lens Length (mm): 92
Back Focus (mm): 38.00
Aspherical: 0
28 1.8 DO
Canon files patent for new DO lenses
Patent publication 2009-198960
Published 03/09/2009
Filing date 2008/02/25
Example 1
Focal length f = 27.14mm
Fno = 1.85
Angle of 77.1 °
Example 2
Focal length f = 24.50mm
Fno = 1.45
Angle of 82.9 °
Example 3
Focal length f = 25.00mm
Fno = 1.45
Angle of 81.8 °
Example 4
Focal length f = 24.33-36.50-47.00mm
Fno = 3.4-4.0-4.7
83.3-61.3-49.4 ° angle
Example 5
Focal length f = 26.00-39.00-50.23mm
Fno = 3.4-4.0-4.7
79.5-58.0-46.6 ° angle
Information
General retrofocus
In general SLR wide angle lens
Many chromatic aberration
Using high-dispersion glass, as excessive compensation around
General diffractive optics
Can correct chromatic aberrations
Where it is difficult to use
Manufacturing difficulties
Aberration can not fine-lattice |
T********r
发帖数: 6210 | 2 哭，手里还有一个340is一直没卖掉。。。
【在 x*******3 的大作中提到】
: 35L f/1.4 LII
: Canon files patent for EF 35 f/1.4L II
: Patent Publication No. US 7,944,625
: Published 2011.5.17
: Filled 2009.8.5
: Specifications
: Focal Distance: 34.59
: Fno: 1.45
: Half angle of view: 32.02
: Image Height: 21.64
|
T********r
发帖数: 6210 | 3 为什么不是35/1.2!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
【在 x*******3 的大作中提到】
: 35L f/1.4 LII
: Canon files patent for EF 35 f/1.4L II
: Patent Publication No. US 7,944,625
: Published 2011.5.17
: Filled 2009.8.5
: Specifications
: Focal Distance: 34.59
: Fno: 1.45
: Half angle of view: 32.02
: Image Height: 21.64
|
z****6
发帖数: 10776 | 4 除了cv，还有哪些35/1.2？
【在 T********r 的大作中提到】
: 为什么不是35/1.2!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
|
o*******6
发帖数: 6113 | 5 24/2.8多好的镜头啊，为什么要replace呢？新头价格肯定不低啊。 |
l***a
发帖数: 12410 | 6 靠。。。乍一看我以为35L2要7944
【在 x*******3 的大作中提到】
: 35L f/1.4 LII
: Canon files patent for EF 35 f/1.4L II
: Patent Publication No. US 7,944,625
: Published 2011.5.17
: Filled 2009.8.5
: Specifications
: Focal Distance: 34.59
: Fno: 1.45
: Half angle of view: 32.02
: Image Height: 21.64
|
T********r
发帖数: 6210 | 7 一堆35/1.4环伺，奸C应该搞个不同的东东才能占领制高点呀。而且搞得
跟50/1.2那样，边角差点，就冲着1.2去买的人也不会在少数，相反，还
搞1.4，要有本质提高太难了。
【在 z****6 的大作中提到】
: 除了cv，还有哪些35/1.2？
|
x****c
发帖数: 25662 | 8 死等标头更新。
其它无视。
【在 x*******3 的大作中提到】
: 35L f/1.4 LII
: Canon files patent for EF 35 f/1.4L II
: Patent Publication No. US 7,944,625
: Published 2011.5.17
: Filled 2009.8.5
: Specifications
: Focal Distance: 34.59
: Fno: 1.45
: Half angle of view: 32.02
: Image Height: 21.64
|
x*******3
发帖数: 8342 | 9
为嘛？你不是24-70控么？
改啦？
【在 x****c 的大作中提到】
: 死等标头更新。
: 其它无视。
|
s**********s
发帖数: 4255 | |
S*M
发帖数: 10832 | 11 这是什么狗变？太诡异了
Example 4
Focal length f = 24.33-36.50-47.00mm
Fno = 3.4-4.0-4.7
83.3-61.3-49.4 ° angle
【在 x*******3 的大作中提到】
: 35L f/1.4 LII
: Canon files patent for EF 35 f/1.4L II
: Patent Publication No. US 7,944,625
: Published 2011.5.17
: Filled 2009.8.5
: Specifications
: Focal Distance: 34.59
: Fno: 1.45
: Half angle of view: 32.02
: Image Height: 21.64
|
o*******6
发帖数: 6113 | |
