k****t
发帖数: 12697 | 1 胶片单反一周一经典之(12)
Pentax MX
预告贴:
http://www.mitbbs.com/article_t0/PhotoGear/34621303.html
上期: Pentax K1000/KM
http://www.mitbbs.com/article_t0/PhotoGear/34716363.html
转眼到了 1976 年, ASAHI 在前一年中已经顺利把 M42 螺口系统过渡到 K 型卡口, 机
身也出了四个型号, 嗯, 接下来干什么呢? 四面看看, OLYMPUS 1972 年开始做单反,
上手就是小型化, OM-1 过去四年挺受欢迎, 咱也来个小型化吧. 于是就有了 M 系列,
一不做二不休, 连镜头也小型化, 于是, SMC PENTAX-M 开始逐步取代 SMC PENTAX.
MX 是 M 系列机身中的第一个, 也是很特别的一个, 因为它跟其他 M 机身根本不是一
个路数, 其他几个, ME, MV, MG 及其子型号都是基于一个框架,一个电子快门, 其他功
能加加减减就弄出 5,6 型号. MX 则完全是它自身一个框架, 全机械, 几乎就是 O... 阅读全帖 |
|
d******a
发帖数: 32122 | 2 NX200 dxomark分数已经和Sony的那块传感器很接近了
NX300据说比NX200强了一大截
NX300 unboxed, impression and comparing with old 20mp sensor camera
2 days ago
2 boxes - 1 for camera and 1 for case bag. thank you Samsung.
comes with Samsung Micro SD adapter card 8 GB. don't know speed but no
matter.
comes with Adobe LightRoom 4.1. support not yet available but soon this
April update from Adobe as promised. shoot jpeg for now.
comes with 18-55 lens with metal mount? MK III version.
body - look more like old rangefinder but b... 阅读全帖 |
|
h*******g
发帖数: 10585 | 3 ☆─────────────────────────────────────☆
kitkat (标头党) 于 (Thu Nov 15 18:59:42 2012, 美东) 提到:
胶片单反一周一经典之(1)
NIKKORMAT FT3
上次的预告贴:
http://www.mitbbs.com/article_t0/PhotoGear/34621303.html
先说说NIKON 这个牌子, 那时没有NIKON CORP (到80年代才改名NIKON CORP 把相机牌
子和公司名字统一起来). 那时公司叫做NIPPON KOGAKU K.K. (日光猪式会社). SLR从
1959年的F 开始, NIKON 牌子只打在专业机上(那时也就F, F2), 非专业不叫NIKON. 早
期出过个NIKKOREX 系列有点象ROLLEIFLEX 前面一大块硒光电池测光, 那个系列是个失
败. 为了竞争非专业市场(那时NIKON 的主要对头不是CANON, 是TOPCON, TOKYO KOGAKU
K.K.东光猪式会社),做了第二次尝试, 就是NIKKORMAT. NIKKORMAT... 阅读全帖 |
|
H*******g
发帖数: 6997 | 4 ☆─────────────────────────────────────☆
Grace09 (Frank) 于 (Thu Aug 30 02:56:54 2012, 美东) 提到:
回此BSO帖。老朽经历类似，还讨不到老婆。少年时，感叹阿飞和他的女人。转眼间，
竟发现自己不如阿飞。十年寒窗苦，解不开一根麻花辫。
一年三百六十日，风刀霜剑严相逼，
明媚鲜妍能几时？一朝飘泊难寻觅。
秋风萧瑟，不见佳人。
悲歌断弦，两行浊泪。
月下独斟，对影三人。
世事漫随流水，算来一梦浮生。
醉乡路稳宜频到，此外不堪行。
********************************************************************
标题这句话 这是我老婆对我说的
我家是城市里的穷人 当初结婚的时候 老婆没有嫌弃我的家境 跟我走在了一起
我知道亏欠她很多 没有房子 没有大钻戒 唯一的赌注就是我的前途
也是我作孽 我不该在这么稳定的时候选择结婚 我自己常常反省 是我害了她
随着时间的推移 在我博士第三年的时候 同龄的人好多也都混出头了 生活状况也都相
当不错... 阅读全帖 |
|
d********r
发帖数: 1238 | 5 上个季度居然50% 新增股票都给了RSU，自己涸泽而渔了
http://online.wsj.com/news/articles/SB1000142405270230341710457
Paying workers with shares may not involve cash. But as Twitter TWTR +4.24%
investors are learning, it comes at a real cost.
Shares of the micromessaging platform tumbled Tuesday as a lockup expired on
stock amounting to roughly two-thirds of its diluted share count. Some of
those shares were held by early Twitter investors. Many were held by
employees granted them to augment cash salaries.
The massive e... 阅读全帖 |
|
Z*Z
发帖数: 12 | 6 i think one of the key points is that some resturants did not inform
customer in advance about this 'minimum consumption', which causes a
lockup problem for the consumers. |
|
G*******e
发帖数: 426 | 7 发现680的测光取景器真土呀：
All three finders shut themselves off when you lock up the mirror,
forgetting their readings and locking up the camera. You must transfer the
meter data to the camera body and have the camera set OUT of AE mode in
order to get the mirror lockup to work. |
|
o****o
发帖数: 8077 | 8 dealer just called, saying the Wireless Control Module is not working
Google returns this information:
Jeep Wrangler Problem
2 ReportsMe Too Edit Model Years Affected: 2007, 2008
Verified
A no crank or no start condition may develop due to electronic lockup of the
wireless control module (WCM), also referred to as the Sentry Key Remote
Entry Module (SKREEM). When this module fails the remote keyless entry
system will also not operate. The WCM is commonly replaced to correct this
concern.
-------... 阅读全帖 |
|
x*b
发帖数: 5723 | 9 Presenting BMW 4 Series M Performance Parts and Limited Slip Differential (
LSD)!
BMW will finally offer an optional limited slip differential (LSD) as part
of the M Performance Parts catalog. The LSD will be a clutch type unit and
feature a 30% lockup. LSD may be offered for other models eventually,
depending on how well it sells for the 4 Series.
http://www.f30post.com/forums/showthread.php?t=866546
经历这么多年，BMW终于要给非M的车型optional LSD了，大家怎么看？ |
|
e**n
发帖数: 1326 | 10 这个不对吧？
假设在一侧悬空时还能发挥20％的最大扭矩的稳态，那么吃在LSD上的有效总扭矩只有
20% * 2000nm = 400nm.
你代入那个公式的时候 "限滑扭矩＝C x 总有效扭矩 ＋B" ，总有效扭矩只能用到
400nm不能用
2000nm吧。
其实我觉得应该用数列的方式来想，
假设torque sensitive LSD的 clutch pack 可以提供 applied torque * 20% 的摩擦
力（左右扭矩差）。
初始的Load由preload提供， 100nm. 也就是说没有任何的torque sensitive 设计的话
，一侧悬空时总的applied torque就是那着地单轮的100nm.
然后就是因为有了这个100nm的applied load，torque sensitive提供了20%的
additional friction => 100 + 20nm, applied torque is now 120nm.
然后 120 × 20% clutch pack is providing total 24nm friction, applied... 阅读全帖 |
|
w*******y
发帖数: 60932 | 11 I work at an Office Depot in Northern California that's had a pile of these
hubs in lockup all year, never had a spot for them on the shelf. They were
always priced at $9.99, but just a few days ago dropped to $4.97 each.
Model #: USB2HUB-7P-1V
OD SKU - 302199
On their website it's listed as delivery only, and shows no picture or specs
, but they may still be available in the store (my store had more than 5).
The hub gets great reviews online and appears to usually sell for $25-40.
|
|
t******g
发帖数: 462 | 12 AONE IPO lockup period (70 M shares) expired 2010-03-29 |
|
q*********u
发帖数: 9501 | 13 这个不是问题，对股价没有太多影响，美国股市因为有option，所以lockup是假的。 |
|
