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全部话题 - 话题: autofocus
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p*****t
发帖数: 3824
1
来自主题: PhotoGear版 - 【参加活动】Nikon 85D
Nikon 85D 是 85G的前一个版本,特点是做工比较好,但是紫边控制比较差
肯大嘴不断的说这个镜头好
This is a very, very good lens. It is made with the same sturdy mechanics as
the 28mm f/1.4D AF and 20-35mm f/2.8D AF.
It is especially well suited to the new Nikon D4 and D800, in fact, this is
the lens with which the Nikon D3 is shown in many of Nikon's promotional
photos.
This 85/1.4 has always been a favorite of portrait professionals, along with
the older 85/1.4 AI-s and newer 85/1.4 G.
THis AF-D lens is the toughest 85mm autofocus lens ... 阅读全帖
x****c
发帖数: 25662
n**b
发帖数: 13203
3
来自主题: PhotoGear版 - 大嘴建议不要转接Leica
DO NOT USE ANY OTHER LENSES, ESPECIALLY LEICA, IN THE RANGE FROM 18mm ~ 60mm.
You can't get better than Fuji's lenses, and other lenses, even awesome
LEICA lenses,won't autofocus or open and close their diaphragms for you as
you shoot and focus.
With other lenses, manual focus might not be that much of a problem, but you
'll have to open and close the aperture by hand every time you want to focus
or shoot or focus. Forget other lenses except for the 12mm Voigtl?nder for
ultrawide, or longer lens... 阅读全帖
s*c
发帖数: 897
4
来自主题: PhotoGear版 - 大嘴建议不要转接Leica
哪个 leica M镜头能autofocus or open and close their diaphragms for you?
大嘴自己吹了那么多leica,现在自己打自己的脸?

60mm.
you
focus
for
n**b
发帖数: 13203
5
来自主题: PhotoGear版 - Xpro-1 何去何从
“DO NOT USE ANY OTHER LENSES, ESPECIALLY LEICA, IN THE RANGE FROM 18mm ~
60mm.
You can't get better than Fuji's lenses, and other lenses, even awesome
LEICA lenses, won't autofocus or open and close their diaphragms for you as
you shoot and focus. "
--大嘴
b****r
发帖数: 17995
6
来自主题: PhotoGear版 - 请教一下用过teleconverter的
推荐一个副厂或者宾得的,有autofocus功能但是对IQ影响较小的teleconverter吧,或
者讲讲你们的经验?
b****r
发帖数: 17995
7
来自主题: PhotoGear版 - 请教一下用过teleconverter的
糖爸再推荐个可以用于K口的能autofocus的?有包子
M****s
发帖数: 693
8
来自主题: PhotoGear版 - 请教一下用过teleconverter的
据我所知,能AUTOFOCUS的有,但是市场上少见,KENKO出过,早就停产。新的现在市场
上几乎没有。
即使有,要注意几点:
1.两倍增距镜,一般只对最大光圈F4以上的镜头有效,狗头被忽略了
2.大部分的这种TELECONVERTER的SDM传递都有问题,别看都有那个触点,听说SOLIGOR
有一款1.4X可以传递,没见过。反而SIGMA的HSM镜头好像问题少一点。据说converter
里有电路,还跟马达的电压范围有关。
3.有的converter连AF螺丝刀传递都有问题——老老实实做个直连接会死啊,非得在
converter内部还加什么电路。。。
画质,只能将就了吧。我原来那个AF AUTOCONVERTER差点让我拆了镜片当AF EXTENSION TUBE,后者更是少见而稀罕的东西。
b****r
发帖数: 17995
9
来自主题: PhotoGear版 - 请教一下用过teleconverter的
对了你这说的这个司马或者宾得的autofocus,你知道是只是converter自己那几片玻璃
转,还是它能让前面接的自动头也能转啊
j*****d
发帖数: 60
10
来自主题: PhotoGear版 - How is this D5100 deal?
the refurbished Nikon D5100 16.2-Megapixel Digital SLR Camera Body bundled
with the refurbished Nikon NIKKOR 18-55mm VR Zoom Lens, Tamron 70-300mm f/4-
5.6 Di LD Macro Autofocus Lens, and other extras for $779.95 with free
shipping.
Y***0
发帖数: 1804
n**b
发帖数: 13203
12
来自主题: PhotoGear版 - Nikon V5! A99对焦喜剧了。。。
测试表明,A99对焦神速。Nikon对焦系统又立功了!
“The final production A99 doesn’t have a built-in flash lamp (Editors
note: some prototypes with built-in flash were tested). There is a new hot
shoe for accys so a special link is delivered with this camera. The
Autofocus is really fast. The A99 (with non final firmware) has an ISO range
of 50-25600 (Editors note: Final firmware will probably have a +2 stop push
in High ISO). Camera is bit lighter than the A900 (973 g with battery). The
A99 weights 827g with battery.... 阅读全帖
i****o
发帖数: 1183
13
来自主题: PhotoGear版 - EOS M正式发布了
Autofocus:
Contrast Detect (sensor)
Phase Detect
Multi-area
Selective single-point
Single
Continuous
Face Detection
Live View
f*******e
发帖数: 8974
u****2
发帖数: 31
s**********k
发帖数: 934
k***w
发帖数: 53
17
来自主题: PhotoGear版 - Canon lens and camera for sale
I want to upgrade my equipment and would like to sell what i am using now.
Canon EF 50mm f/1.8 II Standard AutoFocus Lens $85
condition: almost new used twice
http://www.adorama.com/CA5018AF.html?gclid=CJ_n2eCWiLICFcXb4Aod
Canon EF 24-105mm f/4 L IS USM Lens for Canon EOS SLR Cameras $850
condition: new
http://www.amazon.com/Canon-24-105mm-USM-Lens-Cameras/dp/B000AZ
Canon 40D - $750
http://www.amazon.com/Canon-40D-10-1MP-Digital-Body/dp/B000V5P9
e***s
发帖数: 1397
18
来自主题: PhotoGear版 - 关于Nikon D800的左对焦点问题
目前看到的最全面的综述:
http://hifivoice.wordpress.com/2012/05/05/d800-autofocus-proble
试了几台机子,问题是很明确的,就看你介不介意了。网上有不少把机子寄回给Nikon
修的,返回来极少数反应修好了,大多数说没什么变化,甚至更差了。
有趣的是,B&H上清一色的盛赞D800,没人提左对焦点的问题;
Amazon的review,有一半都提到左对焦点的问题 - 只不过有的人不在乎,有的人持机
观望等着nikon出fix...
e***s
发帖数: 1397
19
来自主题: PhotoGear版 - 关于Nikon D800的左对焦点问题
http://hifivoice.wordpress.com/2012/09/02/d800-autofocus-the-gr
进一步说明,问题是实实在在的,但是因为比较隐晦,估计大部分用户都没注意到。

Nikon
i***f
发帖数: 10682
20
来自主题: PhotoGear版 - $999, 富士x-e1革命机性价比最佳
都有入摸人的出处,
"The next XF 18-55mm lens will be the first with new linear AF motor. It
will help to speed up the autofocus to 0.1 seconds. "
n**b
发帖数: 13203
21
有进步,但是还是没有其它家的快。富士粉会很开心,非富士粉会鄙视。
"We've had our hands on a fully-functional pre-production X-E1 for a couple
of days, and our first impressions are that Fujifilm's promises aren't idle.
Autofocus seems quicker and more-responsive, and the 'feel' of manual focus
has certainly been improved. We're not convinced it can yet match the very
best of its mirrorless peers, but Fujifilm has made a step in the right
direction, and that has to be applauded. Even more laudable is that fact
that existing X-Pr... 阅读全帖
z****6
发帖数: 10776
22
Fujitsu
http://en.wikipedia.org/wiki/Leica_Camera#Leica_S2
The Leica S2 is thus essentially a medium format camera in a "35 mm SLR"-
sized body. The new "Maestro" imaging processor used in the S2 was developed
by Fujitsu and the autofocus system (Leica's first to see production) was
developed in house.
n********g
发帖数: 138
23
来自主题: PhotoGear版 - 佳能 6D 正式指标泄露 DPReview
http://www.dpreview.com/products/canon/slrs/canon_eos6d
MSRP 2099$
Canon EOS 6D
Add to:
20.2 megapixels | 3.2" screen | Full frame sensor
Quick links: Forum
Announced: Sep 17, 2012
Specs
User reviews
Statistics
Specifications
Body type
Body type Mid-size SLR
Sensor
Image ratio w:h 3:2 ?
Effective pixels 20.2 megapixels ?
Sensor size Full frame (36 x 24 mm) ?
Sensor type CMOS ?
Processor Digic 5+
Image
ISO Auto, 100 - 25600 i... 阅读全帖
F******7
发帖数: 4765
24
Canon EF 35mm f/1.4L USM Wide-Angle Autofocus Lens ?
光圈是1.4L对不对?
i***f
发帖数: 10682
25
来自主题: PhotoGear版 - 菜丝要给NEX和Fuji做三个小定焦
找亮点。。。
"Zeiss announced on their blog plans to produce lenses for Sony NEX and Fuji
XF mirrorless cameras. The first three lenses currently in development are
2.8/12, 1.8/32 and 2.8/50 macro. What to expect:
All new Zeiss mirrorless lenses will have autofocus Zeiss lenses for X-mount
will have also a manual aperture setting Priced at around EUR 1,000
Shipping will start in early summer 2013 The new lenses will be made in
Japan
For now Zeiss will not make lenses for Micro Four Thirds because... t... 阅读全帖
p***o
发帖数: 108
26
来自主题: PhotoGear版 - 24-105 4L $780
http://www.ebay.com/itm/Canon-EF-24-105mm-f-4L-USM-Autofocus-Le
卖家是big value inc
$780
c*********a
发帖数: 897
d*****0
发帖数: 68029
28
来自主题: PhotoGear版 - 铁丝对D600 AF赞不绝口
http://forums.dpreview.com/forums/readflat.asp?forum=1021&threa
纷纷表示完胜D300S,甚至比D800还好。
"I’m pleased to report that after extensive testing and specifically
looking for the problem, autofocus on the D600 is fast, accurate and
positive even with moving subjects; perhaps feeling a little more ‘solid’
than the D800 – more like the D700, in this sense.".
Read "The Nikon D600 review: full frame for the masses? – Ming Thein |
Photographer" at http://blog.mingthein.com/2012/09/24/nikon-d600/
i***f
发帖数: 10682
29
看了一下,V1的对焦似乎很神。
"The Nikon V1's full-autofocus shutter lag in single-point AF mode (center
AF position) was incredibly fast, at only 0.097 second with the 10-30mm kit
lens. That's faster than most professional DSLRs we've tested! In auto-area
AF mode, lag more than doubled to 0.234 second, though that's still quite
fast for a CSC and competitive with most DSLRs. Continuous AF mode resulted
in a shutter lag of 0.100 second, also quite fast, though we can't test
tracking ability in the lab. When m... 阅读全帖
b********o
发帖数: 772
s****i
发帖数: 243
31
来自主题: PhotoGear版 - 请教镜头
是这个吗?
Canon EF 180mm f3.5L Macro USM AutoFocus Telephoto Lens for Canon SLR
Cameras
请问用这个为什么比100mm的好?
e**n
发帖数: 5876
32
来自主题: PhotoGear版 - 微单对焦速度问题
cont. autofocus所有微单都有, 但都是杯具
r******o
发帖数: 1530
33
1岁小孩,回国要待半年,爷爷奶奶要求给配备一个好用的相机,特别指明不要单反,
说那个太大,太复杂不好随时拿起就照。
去Amazon看了一圈,去dpreview看了一圈,晕了,现在数码相机这么多啊?
估计在Canon,Nikon,SONY和Panasonic里面选一个吧?
貌似Canon SX260 HS好像不错,但是dpreview说autofocus有点慢,拍小孩子会不会不
给力?
求推荐,谢谢!
a****a
发帖数: 363
34
来自主题: PhotoGear版 - 卖两个全新canon lens
Canon EF 50mm f/1.4 USM Standard AutoFocus Lens
Canon EF-S 55-250mm f/4-5.6 IS II Image Stabilizer Telephoto Zoom Lens
new in hand
pls PM
thanks!
a****a
发帖数: 363
35
Canon EF 50mm f/1.4 USM Standard AutoFocus Lens $310
Canon EF-S 55-250mm f/4-5.6 IS II IS Lens $150
+ Your label
全新 new in hand
i***f
发帖数: 10682
36
来自主题: PhotoGear版 - 尼康的牌子算是砸了。。。
看看这位悲惨的,跟Amazon换了三台,都有泥,最后绝望了,准备自己PS处理算了,
"This is my first DSLR and I wanted to love it. I put in a lot of research
and this camera seemed perfect for what I needed.
The first one came with a large spot on the sensor (and some smaller spots).
It was almost 0.3 mm (actual physical dimension -- the number of pixels
affected in the photo was much larger) and it could be seen in the shot even
at F 3.5. I tried the "clean sensor function" I even blocked the mirror up
and attempted to blow the dirt a... 阅读全帖
f**s
发帖数: 968
37
链接在此:
http://www.kenrockwell.com/tech/8mm-f35.htm
8mm f/3.5 Fisheye
Pro-Optic, Samyang, Rokinon, Bower &c. (2009-)
© 2010 KenRockwell.com. All rights reserved.
Intro Specs Performance Compared Recommendations
8mm f/3.5 Fisheye, Pro-Optic Nikon AI-s version. enlarge. ($290, Korean, no
filters, 13.8 oz./391g). This one came from this link to it at Adorama (also
specifically in Nikon, Canon EOS, Pentax/Samsung and Minolta Maxxum/Sony
mounts). It also comes branded as Bower, also specif... 阅读全帖
L****n
发帖数: 12932
38
LA-EA2+SAL50F1.4
phase detect autofocus, continuous AF even video.
m***i
发帖数: 2480
39
来自主题: PhotoGear版 - MS 5D III 2499
6d has the same autofocus as 5d mark iii. GPS and wifi
m***i
发帖数: 2480
40
来自主题: PhotoGear版 - MS 5D III 2499
Same autofocusing system as mark III - much better than mark ii
L****n
发帖数: 12932
41
来自主题: PhotoGear版 - sony NEX的话入5还是入7好?
5N in my opinion is a half finished product. The body is sleek, the sensor
is excellent, but the kit lens sux, not only quality bad, but so damn large,
just like a MB convertible dragging a trailor :-) make it not a
pocketable camera.
If u consider the price, get the nex6 kit for 1k, sell the highly sought
after pancake 1650 for 400, and get the 1855 for less than 100. U end up
spending 700, 300 more than 5n kit, but u get a EVF, flash, wifi and build
in phase detector autofocus, a no brainer... 阅读全帖
p*********e
发帖数: 32207
42
来自主题: PhotoGear版 - sony NEX的话入5还是入7好?
我买5n唯一的目的是转接leica的镜头,图的是它的轻便和转接友好
现在我的5n上是通过一个voitlander的M mount to E mount adapter转接50lux
所以nex6的其他好处,比如autofocus, flash, 乃至wifi对我都没有吸引力
evf很有,但反过来nex6的机身也要大些
所以综合看5n就更吸引我了
尤其是那个touch screen在取景时的放大功能,对手动头来说非常方便.

large,
s***7
发帖数: 1644
43
真的改善了吗?多大差别?目前市价两个套机差200块,不知道这差价值不值。
L****n
发帖数: 12932
44
加个翻转屏, wifi 各100刀。 其余一样。 not woth it IMHO.
b*******5
发帖数: 234
45
我用过,不过作为一个新手小白,不知道评价有没有参考意义,就是排娃时,就和dc一
样一按就对,自己识别娃脸,还出现婴儿图标(不知如何做到的),然后拍挺清楚的,
我几乎不用手动对焦,慢而且我很弱不知道对清楚了没。可惜从没用过5N没有对比,完
全是sony脑残粉,想买就直接订新款了。

★ 发自iPhone App: ChineseWeb 7.7
G********n
发帖数: 615
46
Canon EF 50mm f/1.8 II Camera Lens by Canon
$110.99
Canon EF 50mm f/1.8 II Standard AutoFocus Lens-Gray Market by Canon
$100.90
拍娃用,请问买哪个比较好?多谢!!
g********o
发帖数: 134
a*******e
发帖数: 3021
48
来自主题: PhotoGear版 - amazon 的三洋又要来了
人家还是清楚地,
No, it does not. Only the Bower 8mm f/3.5, the Bower 14mm f/2.8, and the
Bower 85mm f/1.4 lenses in our inventory have the focus confirm chip inside
the lens.
Manzell L: By the way, it is not an AF chip, as the Bower lenses are manual
focus lenses, not autofocus lenses. The above lenses simply have a focus
confirm chip which allows the green focus confirmation LED inside the camera
to light when the camera thinks the image is in focus while you are
focusing manually.
可惜了
l*x
发帖数: 396
49
lens rental测试中心对焦点随机误差,无敌兔和入门机差不多,在全幅机中完败。
http://www.imaging-resource.com/news/2012/08/01/autofocus-reali
l**********3
发帖数: 212
50
来自主题: PhotoGear版 - 最终买Nex6相机,请拍照问题请教
在版上请教了很多问题,最终买了Nex6和两个镜头,其中一镜头是50mm,1.8的,主要用
来拍娃。
我是初学者,我现在就是用autofocus拍出来照,效果很不错,就是老是出现红光来
focus,我爸爸不让我拍,说是对小孩眼睛不好,后来改用manual focus, 就是用调啊
调,拍出来效果不好,灯光很暗,不柔和,怎么样能改进啊。。。请指教一下。。。
另请高手推荐一本关于nex6的学习书本,还是就看说明书就好啊。。。。
Thanks
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