N*****3
发帖数: 1405 | 1 Camera Nikon D3
Exposure 0.017 sec (1/60)
Aperture f/2.0
Focal Length 24 mm
ISO Speed 1600
Exposure Bias 0 EV
Flash No Flash
X-Resolution 240 dpi
Y-Resolution 240 dpi
Software Adobe Photoshop Lightroom 3.4
Date and Time (Modified) 2011:05:01 23:41:04
Artist CHEN TE CHIH
Copyright WingmanChen Photo Studio
Exposure Program Manual
Date and Time (Original) 2011:05:01 19:41:37
Date and Time (Digitized) 2011:05:01 19:41:37
Max Aperture Va... 阅读全帖 |
|
s******0
发帖数: 1340 | 2 N+的MTF图一般给出两张图,
第一张是wide的图,我的理解是wide aperture,算它最大光圈,那焦距是多大呢?是最短
处吗?那长焦端最大光圈的MTF是什么情况?
第二张写的是tele,猜想是长焦端,那aperture是多大呢?
这方面C+就比较清楚,短焦端给出最大光圈和F8的MTF,长焦端也是,给出的图是N+的二倍
. |
|
x****c
发帖数: 25662 | 3 1. make sure the lens you use has no back/front focus issue. Use the focus
test you just did to find out.
2. manually select focus point. and try to use center point as often as
possible, especially in low light and when use large aperture. Try not to
recompose (especially when you use large aperture and the object is closed
to you).
3. there is a little trick claimed by some ppl on the internet that helps
the focus a bit. Phase 1, half press the shutter to focus; Phase 2, release
it and re-half... 阅读全帖 |
|
R***a
发帖数: 41892 | 4 http://forum.xitek.com/showthread.php?threadid=884437
??pentaxforums???:
World's Smallest and Lightest Interchangeable Lens Digital Camera
The Q represents an evolution in interchangeable lens digital camera design,
featuring the world抯 smallest and lightest body. Experience the PENTAX Q.
The Camera. Evolved.
Q-Mount Lens System
The Q features the newly designed PENTAX Q-mount lens system for convenient
interchangeability with a variety of specialty Q lenses. Choose from a
selection of prime, zo... 阅读全帖 |
|
S*M
发帖数: 10832 | 5 原来是想吸引lomo用户
In addition to these relatively high-end lenses, Pentax will offer three
other lens options that highlight the camera's youthful, creative potential,
as well as its enthusiast appeal. The manual focus '03 FishEye' offers a
160° field of view and a fixed F5.6 aperture. Meanwhile, the 35mm equiv. '
04 Toy Lens Wide' and 100mm equiv. '05 Toy Lens Telephoto' are fixed
aperture, manual focus lenses designed to recreate the look of cheaply-made
film cameras such as the Diana. Each will co... 阅读全帖 |
|
a***a
发帖数: 40617 | 6 写raw文件时间爆长，中间还不能有任何操作。。。
Unfortunately, though, the X100's operational speed is rather spoiled by one
quite fundamental flaw. The camera locks-up all of its button-driven
operations while it's writing files to the memory card, and if you're
shooting RAW this can take up to 7 seconds, even with a reasonably fast SD
card. You can still autofocus or change the shutter speed, aperture, and
exposure compensation, but during this time you can't change the ISO, switch
between the OVF and EVF, focus man... 阅读全帖 |
|
|
G********d
发帖数: 10250 | 8 2.8E好象是小叶子喜欢的
Secret about Rolleiflex 2.8D and 2.8E / E2 / E3 have and what 2.8A, 2.8B, 2.
8C and even 2.8F do not have is the EVS system. The "secret" button in the c
enter of the aperture control wheel can be pressed and turned to couple or u
ncouple the EVS system. EVS system allows one fixed EV value with correspond
ing shutter speed and aperture combination. The EV value is read off from th
e center pointer of the shutter speed knob.
There is no quick release catch for the waist level hood.... 阅读全帖 |
|
s*****e
发帖数: 21415 | 9 ☆─────────────────────────────────────☆
Ranma (ranma 1/2) 于 (Wed Jun 22 15:45:19 2011, 美东) 提到:
http://forum.xitek.com/showthread.php?threadid=884234
1/2.3" 12M BSI
跟我估计的一样
1. Q是这个微型的NC-1是APS-C的，而不是以前说的。因为Q这个名字明显更加接近消费级
2. 感光器是1/2.3" BSI CMOS而不是1/2.33" CCD，因为1/2.33"这个规格是
松下的，P1从来没用过P2的感光器。另外CCD连拍忒慢，正确的选择是用CMOS
☆─────────────────────────────────────☆
mak007 (粉之深黑之切) 于 (Wed Jun 22 15:46:55 2011, 美东) 提到:
到底是apsc还是1/2.33？
☆─────────────────────────────────────☆
Ranma (ranma 1/2) 于 (Wed ... 阅读全帖 |
|
y***n
发帖数: 2318 | 10 The gears include 50mm f1.4, T2i, and 430EXii.
For indoor, set the parameters as - Tv, 1/1600S, ISO 200, f1.4, 45 degree
flash bouncing, and rely on the 430's auto exposure feature for satisfying
results (even the viewfinder indicates way underexposure). Good things about
these settings:
1. High shutter speed to capture the constantly moving subject
2. Instant and accurate auto-focus - thanks for the 430's focus light n
feedback to the camera
3. Big aperture for pleasing blurred background
4. Lo... 阅读全帖 |
|
d******a
发帖数: 32122 | 11
http://www.dpreview.com/reviews/samsungnx10/page18.asp
The Samsung NX 30mm f/2 is a highly attractive pancake lens. It's very sharp
across the image frame straight from f/2 onwards and the results are really
great at medium aperture settings. Distortions as well as lateral CAs are
minimal and not field relevant. You may spot some purple fringing in extreme
contrast situations but that's rather typical at very large apertures
anyway. The amount of vignetting is minor even at f/2 (at least from a... 阅读全帖 |
|
k********a
发帖数: 446 | 12 这篇文章里关于5D2的部分都不对啊。例如文章里说：
“5D MARKII只有中心点是十字对焦。而1Ds3是所有辅助对焦点以外都是十字对焦。而
这两款机型的十字对焦点配置均是一个横向F2.8的线性感应器+一个纵向的F5.6线性感
应器。”
“也就是说。即使5D2中心点是十字对焦。但是如果你配置的镜头光圈小于F2.8时（比
如F4）.那么，中心点也只能触发F5.6感应器的反差检测。此时你的中心点十字对焦依
然只能当一字对焦使用。不具备高精度。”
可是5D2 English Manual 里是：
【【5D2】】:
【With lenses whose maximum aperture is larger than f/5.6】
With the center AF point, cross-type AF (sensitive to both vertical and
horizontal lines) is possible.
【With lenses whose maximum aperture is larger than f/2.8】
With the center AF point... 阅读全帖 |
|
m*z
发帖数: 3102 | 13 Exposure 112
看来你都不知道长曝光是什么呢....
PS就是模模皮, 加加颜色.就这么多了
-------------------------
Camera Nikon D7000
Exposure 112
Aperture f/14.0
Focal Length 18 mm
ISO Speed 100
Exposure Bias +1/3 EV
Flash Off, Did not fire
Orientation Horizontal (normal)
X-Resolution 240 dpi
Y-Resolution 240 dpi
Software Adobe Photoshop CS5 Windows
Date and Time (Modified) 2011:10:29 21:11:04
Exposure Program Manual
Date and Time (Original) 2011:10:27 10:03:33
Date and Time (Digitized) 2011:10:27 10:03:33
Max Aperture Value 3.5
S... 阅读全帖 |
|
m*z
发帖数: 3102 | 14
Camera Maker: Canon
Camera Model: Canon EOS REBEL T2i
Lens: Canon EF 50mm f/1.8 II
Image Date: 2011-11-01 00:14:26 (no TZ)
Focal Length: 50mm
Aperture: f/2.8
Exposure Time: 0.067 s (1/15)
ISO equiv: 3200
Exposure Bias: +0.33 EV
Metering Mode: Matrix
Exposure: aperture priority (semi-auto)
White Balance: Manual
Flash Fired: No (enforced)
Orientation: Normal
Color Space: sRGB
GPS Coordinate: undefined, undefined
Software: QuickTime 7.6.6
厉害~~(1/15) 60下很易糊的~~ |
|
s****h
发帖数: 921 | 15 先找到一个local专卖店，人家说是shutter坏了，打不开，
找到一个local维修点，人家说肯定是Aperture Control Unit坏了，所以才shutter打
不开。
我有点昏。
最恐怖的是因为日本地震，所以Aperture Control Unit没货。 |
|
|
T*******I
发帖数: 5138 | 17 I would like to say it is but not definitely. Some lens with oily blades
might not work properly since the blades might always open to its maximum,
and you cannot adjust it by turning the aperture circle. In this case, you
must clean the blades by opening the lens units. Actually the cleaning is
not tough if you have basic knowledge and tools. It is relative easy.
If the oily blades still work (I mean they can be adjusted to what you wish)
properly, you don't need to clean it, especially when wo... 阅读全帖 |
|
i****o
发帖数: 1183 | 18 Me: Please use AV.
Siri: AV on, what aperture do you want to use？
Me: 1.2
Siri: Man, your Nikon lens sucks, the max aperture is 1.4.
Me: Oh...then 1.4 please
Siri: what ISO do you want to use?
Me: 1600
Siri: 咔嚓 |
|
n**b
发帖数: 13203 | 19 好消息，从Poll来看，发生的概率只有40%，还不到一半！
Some X100's have a factory fault which causes their aperture blades to stick
. Has your camera been so cursed?
1. No, my camera is quite new (under 500 exposures) and all seems well at
present (70 votes [16.83%])
2. No, my camera has some mileage on it (over 500 but under 5,000
exposures) and all is still well (141 votes [33.89%])
3. No, my camera is a work horse with more than 5,000 exposures and still
work perfectly (35 votes [8.41%])
4. Yes, the apert... 阅读全帖 |
|
d*h
发帖数: 2347 | 20 I would say try 50f1.8 first because it is cheap, plus you don't really lose
anything even if you don't want it, can sell it easily.
for new babies, they are small and lying in they back most of the time, you
need to be able to shoot quite close, and a lot of time, from the top to 45
degree down, so you might need a 35mm.
IMO, you don't need a 28mm, because of the distortion, unless this
distortion really works towards your favour...
try use your stock 18-55IS lens, that is what i did, keep tryi... 阅读全帖 |
|
a****g
发帖数: 164 | 21 Aztek Premier 有 3.3 micron aperture, tango 只有 10 micron aperture. Aztek的
scanner 应该实际解析度更高一些。 |
|
e****t
发帖数: 17914 | 22 aperture ring是stuck的，完全松了，上网查了查是 75 Summarit的普遍情况
卖家是主动PM找我卖的。
几个小时前联系卖家 不鸟我
一般等几天爆？
是paypal CC付款的
-------update-------
收到回信
I had never noticed or felt the aperture ring had any issues. I fully tested the lens before I boxed it up and did
notice anything wrong. I have a concern returning the equipment sonce it has been out of my possesion for a
few days and do not know what it may have been subjected to.
Chris |
|
x****c
发帖数: 25662 | 23 Aperture clicking stops completely if you enable the "power save" mode.
But when you're in the power saving mode, without the constant aperture
adjustments (which causes the clicking) the AF gets much slower (roughly: AF
time doubles!). You also won't have the histogram displayed.
So in power saving mode you'll only hear sounds when the lens is focusing (
obviously).
I still haven't decided which is a better compromise for me
试试这个 |
|
z****6
发帖数: 10776 | 24 镜头包括bokeh和aperture blade，google一下x100 aperture blade, x100 bokeh这两
个吧 |
|
x5
发帖数: 27871 | 25 ☆─────────────────────────────────────☆
expert (老猫咪@毛毛的爹) 于 (Sat Mar 17 14:48:11 2012, 美东) 提到:
aperture ring是stuck的，完全松了，上网查了查是 75 Summarit的普遍情况
卖家是主动PM找我卖的。
几个小时前联系卖家 不鸟我
一般等几天爆？
是paypal CC付款的
-------update-------
收到回信
I had never noticed or felt the aperture ring had any issues. I fully tested the lens before I boxed it up and did
notice anything wrong. I have a concern returning the equipment sonce it has been out of my possesion for a
few days and do not know what it may have been subje... 阅读全帖 |
|
l******t
发帖数: 115 | 26 You could give this a try:
1. AV mode;
2. Set aperture to max (e.g., set aperture to 4 if you have the 24-105 F/4
kit lens);
3. Set other things auto (ISO, etc.);
4. Take photos.
(You could learn other stuffs when you have time.) |
|
d*****0
发帖数: 68029 | 27 sensor外的对焦系统是19点11个十字点，定价2800。。。
Sony Introduces New Full-Frame α99 Camera with Translucent Mirror
Technology and Dual AF System
Flagship α A-mount camera delivers new levels of image quality, focus
capabilities and video performance
SAN DIEGO, Sept 12, 2012 – Sony’s long awaited α99 digital camera sets a
new performance standard for professional-class DSLRs, combining all of the
benefits of full-frame imaging with the responsiveness and speed of
Translucent Mirror Technology.
The successor to S... 阅读全帖 |
|
z****6
发帖数: 10776 | 28 http://www.canonrumors.com/2012/11/ef-24-70-f4l-is-ef-35-f2-is/
As suspected the new Canon EF 24-70 f/4L IS will be announced. This lens
should appears as a kit lens with the upcoming EOS 6D. The other lens isn't
a new 50mm at this time, it's acctually going to be a new EF 35 f/2 IS.
Pricing will also be higher than the previously unconfirmed suggestions.
EF24-70mm F4L IS USM
15 elements in 12 groups, two aspherical lens, lens configuration sheet
2 UD lens
9-blade circular aperture
W... 阅读全帖 |
|
p**********8
发帖数: 4234 | 29 aperture value or aperture priority mode? |
|
e**n
发帖数: 5876 | 30 我试图给qaz解释一个概念, 就是镜头的物理孔径(diameter of the entrance pupil/
aperture)到底和底片大小有没有关系.
qaz认为"因为底大了,同样的光圈值,镜头光圈直径要变大.这个是和底片的对角线成正
比的."
我试图解释说: 镜头的物理孔径(diameter of the entrance pupil/aperture)只由焦
距和光圈决定，与底片大小无关. F=f/D F为光圈数，f为焦距，D物镜口径.
例如: 43上的50mm f1.8的头和FF上的50mm f1.8头. 这两个镜头f1.8的光圈孔径都是
50mm/1.8=27.78mm. 也就是虽然两个头在不同系统(底片大小)上, 但光圈孔径都是一样
的.
qaz非说43底小, 所以同样的光圈值, 光圈直径就小.
我公式都给了, 不知道再怎么解释了. 童鞋们帮帮忙
不要PA阿. 谢谢 |
|
b****1
发帖数: 3685 | 31 Camera Maker: Panasonic
Camera Model: DMC-GH2
Lens: LUMIX G VARIO 100-300/F4.0-5.6
Image Date: 2012-08-12
Focal Length: 162.0mm (35mm equivalent: 324mm)
Aperture: f/6.3
Exposure Time: 0.0008 s (1/1250)
ISO equiv: 160
Exposure Bias: none
Metering Mode: Spot
Exposure: aperture priority (semi-auto)
White Balance: Auto
Flash Fired: No (enforced)
GPS Coordinate: undefined, undefined
Software: Adobe Photoshop Lightroom 4.1 (Windows) |
|
M**X
发帖数: 3014 | 32
Manual是给大师用的~~~
比如你一看你拍那个地方就知道around how much shutter/aperture/ISO~~、那时你就
可以
用Manual了
~~
比如下面照片你知道要用多少shutter/aperture/ISO吗? |
|
w****e
发帖数: 2210 | 33 Take a look at the list of ALL 51 improvements the X20 has over the X10,
1. 2/3-inch X-Trans CMOS II sensor without optical low pass filters improves
resolution to as much as a 4/3″ sensor.
2. S/N ratio improved to level similar to Full frame sensors.
3. Phase detection AF allows for AF speeds as low as 0.04secs (compared to
X10 0.16secs).
4. 1080p HD video @ 60fps (X10 1080p HD video @ 30fps).
5. Phase detection Autofocus also works during movie recording.
6. Face detection works during movie r... 阅读全帖 |
|
y*********e
发帖数: 7269 | 34 最牛的革命机了
亮点，比EM5改进的五轴防抖和AF
新的小范围AF，是革命机Contrast AF的一大突破，有望比Phase AF更小更精准。
Super Spot AF: Selectable from center of enlarge view(0.02% – 0.16% in
view image)
内置wifi功能结合smart phone，弥补了之前没有GPS，wireless shutter release的缺
陷，上传照片更方便。
唯一遗憾就是没有三防了。
http://www.43rumors.com/
Model name: E-P5
Product type: Micro Four Thirds interchangeable lens system camera
Memory : “SD Memory Card*1 (SDHC, SDXC, UHS-I compatible, Eye-Fi Card
compatible*2 )
*1: Class 6 or higher is recommended for Movie shooting.... 阅读全帖 |
|
b*****t
发帖数: 3928 | 35
Exif data
Camera Nikon D300
Exposure 0.002 sec (1/640)
Aperture f/7.1
Focal Length 11 mm
ISO Speed 200
Exposure Bias +2/3 EV
Software ViewNX 2.7 W
Exposure Program Aperture-priority AE |
|
j****c
发帖数: 19908 | 36 看你最先用什么了
我一直用LR，最近试了aperture，觉得aperture难用呢 |
|
d***l
发帖数: 50 | 37 想要看看自己那个焦段用的最多。照片都再Apple Aperture里。请推荐一个Mac上能用
的统计软件，有Aperture plug-in 更好。 |
|
p*********r
发帖数: 4593 | 38 Used the Google translator to translate. Some of the text can not be copy-
pasted for some reasons. Most of the comments for each camera were copied.
Here is from output from Google translator
A sharp photo of example
to shoot a building is today
no longer a challenge for
a system camera. But alas, the subject
moves: Be it the pedaling child, the
rennende athletes or vorbeiflitzende
Sports car, the autofocus systems are guided to their limits. During
the focus on static
Motifs in the laboratory ... 阅读全帖 |
|
m********l
发帖数: 6748 | 39 手动aperture ring了吗？要对准"A" marking，手动调光圈值是不行的，放到"A"以后
，机器在aperture priority可以调光圈。 |
|
w**7
发帖数: 5258 | 40 Wiki 是个好东西
“where f is the focal length, and D is the diameter of the entrance pupil (
effective aperture). It is customary to write f-numbers preceded by f/,[2]
which forms a mathematical expression of the entrance pupil diameter in
terms of f and N. For example, if a lens's focal length is 10 mm and its
entrance pupil diameter is 5 mm, the f-number is 2 and the aperture size
would be expressed as f/2”. |
|
O*********h
发帖数: 4674 | 41 Aperture
LR
DPP
这是我prefer的顺序
DPP/LR都还行，但是Aperture貌似就是色彩比较讨喜，不知道为啥，自动曲线/对比度/
色阶都很给力
DPP貌似就是比较简单，几个色彩模式，然后就是锐度，对比，高光，阴影，效果也只
能说一般般，最不能容忍的就是太慢了，尤其是数码矫正，降噪，都很慢 |
|
O*********h
发帖数: 4674 | 42 DPP最方便，你确定？
Aperture比DPP快多了，就算升级，aperture也更快
DPP方便在哪里? |
|
b******g
发帖数: 3616 | 43 链接在此：http://dealsea.com/view-deal/169542
上次去马蹄湾就恨自己少个鱼眼没能来张带人的震撼照，后来一直关注鱼眼。这个头我
观察了一阵了，Nikon版大部分白店的价格在280-290之间，终于今天来了deal，230的
价格需要的朋友可以入手了。
另外解释下前几个月曾经有过199刀的Rokinon 8mm鱼眼deal和这个是不一样的。以下是
科普：
Rokinon 8mm鱼眼对Nikon来说有3个版本，对Canon,Sony等有2个版本。
1。最便宜的一个版本是这个：
Rokinon FE8M-N 8mm F3.5 （FE8M-C for Canon)
http://www.amazon.com/Rokinon-FE8M-N-Fisheye-Nikon-Black/dp/B00
这个版本也就是版上前几周讨论过的199的deal。这个FE8M版是第一代产品，成像很好
，但有2个缺点。第一是hood不可拆，直接的后果就是在全幅上hood的一部分会出现在
照片里，需要裁掉。第二个缺点是在Nikon相机上无法测光，也就意味着设置光圈/快门
只能靠不停地试。
... 阅读全帖 |
|
d*****e
发帖数: 515 | 44 所有的镜头，拆下来，调转一下，都是微距镜头。调转之后用手扶住，别漏光进来就可
以照微距了。缺点是不能自动focus，不能调节aperture。如果镜头F值太小的话，景深
小，在拆下镜头前需要把aperture调小。
对于偶尔拍一下微距的人来说，不用投资买微距镜头了。
还可以买一个转接头，更方便了。转接头很便宜，amazon上搜索“Macro lens Reverse
Adapter”
有时候需要step up， step down ring，要注意male female thread。 |
|
o**s
发帖数: 3412 | 45 to continue to be a PITA,
his maths formulas and graphs gave me a headache but here is the conclusion
i thought made sense:
'Cameras with larger pixels are NOT inherently less noisy. The larger pixels
only enable more light to be collected to produce higher signal-to-noise
ratio images. But it is the lens and exposure time that deliver the light to
the pixels.
Larger pixels = less detail. It is a continuum trade between detail and
light per pixel. There is no free lunch. If you want the same det... 阅读全帖 |
|
d**********n
发帖数: 3634 | 46
Virtual currency on mitbbs, used to buy virtual clothing items for your
avatar. (I think that's the only use?)
Have you tried metabones? http://www.metabones.com/products/details/MB-EF-E-BM3
there's eletronics in the adapter that allows you to adjust aperture
electronically via your A7. Oh also, A7 shutter sound is quieter than A7R,
so you are lucky.
Edit:看错了，你说的是鞋产。他们转E mount的adapter都有aperture ring on the
adapters themselves |
|
d**********n
发帖数: 3634 | 47 Ok so I've shot a few college dance shows before, and they are a pain in the
ass. I don't know if kids performances are as painful, but here are some
tips that might apply:
1. Scenes change, lighting change, constantly check your photos to make sure
you are not over/under exposing.
2. Red light is your enemy, but I doubt kids performances will saturate the
stage with red light like dance performances.
3. Shallow depth of field/wide open aperture might sound like a great idea
due to the low light... 阅读全帖 |
|
d**********n
发帖数: 3634 | 48 1. Get in close
It was the famous photojournalist Robert Capa who once said "If your
photographs aren’t good enough, you’re not close enough.” He was talking
about getting in amongst the action. If you feel like your images aren’t ‘
popping’, take a step or two closer to your subject. Fill the frame with
your subject and see how much better your photo will look without so much
wasted space. The closer you are to the subject, the better you can see
their facial expressions too.
2. ... 阅读全帖 |
|
d**********n
发帖数: 3634 | 49
I hope you understand english, here goes...
The sigma lens is EF-S, meaning it will only fit on crop-body sensors like
70D. Full frame sensor cameras like 6D can't use it. In general, full frame
is better than crop body, minus a few special cases like sports and what not
. Anyways, don't bother with that sigma lens even if you are buying a crop
body, because it's not a good enough lens. For a better alternative,
consider http://www.amazon.com/gp/product/B000FZ3FY8/ (that listing is shipped from... 阅读全帖 |
|
G*******g
发帖数: 3729 | 50 新版本
The Sigma 120-300mm f/2.8 DG OS HSM Lens for Canon is a telephoto zoom lens
featuring a fast, constant f/2.8 maximum aperture. This lens is the first
lens designed under Sigma's new Sports line of lenses, making it well-suited
for fast-moving subjects such as wildlife, nature, aviation, racing, and
other similar situations.
Featuring a dust- and splash-proof construction, this lens is ideally-suited
for use in outdoor and adverse conditions. Its design features rubber focus
and zoom rings as... 阅读全帖 |
|
