能作到这样实在是不容易，N的技术水平挺高，但是实用性一般，怕使用中没电了，可以多带电池，用不着加套机械快门，想用机械的有FM2呢，N的想法还是挣钱。

电子机械混合快门相机除了pentax LX 和加能新F1，还有图中
所示的加能EF，它的快门从1/2到1/1000秒为机械，30秒到1秒
为电子。快门从30秒到1/1000秒都能整挡手动设定，它的自动
曝光方式是快门优先。在手动相机中，慢速快门能够手动设定
到30秒的好象只有它了，其次是美能达的XK能到16秒。

尼康这个FM3对各挡快门都能双重控制，显然与老机不同，对
怀旧的烧友会有很大吸引力。但不知可靠性如何，另外工艺上
还能否保持80年代的水平(新FM2掉漆的事时有耳闻)？再有加个点
测光好象也不是什么难事，cosina可以轻易地在FM10的胚子上
弄出有点测光的奥林帕司2000，还不比FM10贵，尼康为啥不能？

还真是这么回事，好！好！看来俺错怪N了。
来自NIKON 加拿大网站
Introducing the Nikon FM3A - a manual-focus, auto exposure SLR camera.

Nikon Corporation is pleased to announce the introduction of the Nikon FM3A 35mm (135) format manual-focus SLR camera, designed as the successor to our popular Nikon FM2.

The new FM3A inherits most of the FM2's features, like durable metal body construction and a classic centre-weighted meter.

The hybrid shutter control system enables mechanical shutter speed control to be operated without batteries at any shutter speed, while in A mode the shutter speed is electronically controlled for Aperture-Priority Auto operation. In addition, TTL (through-the-lens) flash control, DX-coded film speed settings and new bright view focusing screens are also available. These features provide an unprecedented degree of flexibility in a manual SLR with the added benefits of selected automation.

The FM3A offers photographers access to the Nikon System, which includes the professional AF-S Nikkor lens lineup and many other AF and manual Nikkor lenses, in addition to a range of accessories.

With its classic exterior, simple operation and compact body design, the FM3A is the ideal camera to gain entry into the world of pure, personal SLR photography.

Nikon FM3A Major Features

Manual-focus 35mm SLR.
Durable, die-cast body
Hybrid shutter speed control system - When shutter speed is selected manually, the FM3A works without batteries at all speeds.
Aperture-Priority Auto exposure control possible with Ai-type Nikkor and AF Nikkor lenses.
Top shutter speed of 1/4000 sec. and peak flash sync speed of 1/250 sec.
Exposure compensation (-2 to +2 EV)
Standard TTL flash control possible
TTL flash-compensation button for balanced fill-flash effect
Compatible with DX-coded film cartridges
Three types of new, bright clear matte interchangeable focusing screens allow pinpoint-focus, even in dim light.
Sequential shooting of up to 3.2 frames per second with Motor Drive MD-12
Black or silver body available

Nikon FM3A Specifications
Type of camera
35mm single-lens reflex with electronically and mechanically controlled focal-plane shutter

Applicable film
35mm film in a cartridge

Frame size
24 x 36mm

Lens mount
Nikon F mount

Shutter Vertical-travel, metal focal-plane shutter

Shutter-speed settings
A (aperture-priority auto): 8 to 1/4000 sec., electronic stepless control (indications are 1 to 1/4000)
Manual: Bulb, 1 to 1/4000 sec., mechanical control

Viewfinder
Eye-level pentaprism

Eyepoint
14mm (at -1.0m-1)

Focusing screen
K3 type (split prism-image microprism type, Clear Matte Screen II) standard, B3 type and E3 type optional

Viewfinder frame coverage
Approx. 93% (objective screen)

Viewfinder magnification
Approx. 0.80x with 50mm lens set to infinity

Viewfinder information
Shutter speed, exposure meter indication, shutter indication, direct aperture value, exposure compensation mark, ready light

Reflex mirror
Quick-return type

Exposure meter sync
Ai type (automatic compensation at full-aperture f-stop)

Metering system
TTL centre-weighted, full-aperture exposure metering system, approx. 60% of the meter's sensitivity concentrated on a 12mm diameter circle

Metering range
EV 1 to EV 20 at ISO100 (with a 50mm f/1.4 lens)

Film-sensitivity settings
DX system or manual. With DX: ISO 25 to 5000 Manual: ISO 12 to 6400

Exposure compensation
Exposure compensated to ? EV in units of 1/3 EV (compensation to the + side not possible with ISO 12, and that to the - side not possible with ISO 6400)

Auto Exposure Lock
Enabled by pressing the AE lock button

Film advance
Lever provided, 30-degree standoff angle and 135-degree winding angle, automatic film advance enabled with MD-12 Motor Drive (sold separately)

Frame counter
Additive type (S, 1 to 36), automatic reset

Film rewinding
Film reset button and rewind crank provided

Self-timer
Mechanically controlled, countdown time of approx. 4 to 10 seconds, cancellation possible

Lens aperture
Instant-return system, with aperture lever

Multiple exposure
Activated with multiple exposure lever

Sync contact
X-contact only; synchronized with the flash at a low speed of less than 1/250 sec.

Flash control
TTL flash: Enabled by using SB-28, SB-27, etc. in combination
TTL flash compensation: Compensation to -1 EV activated with the TTL flash compensation button on the camera
Film speed synchronization in TTL flash: ISO 12 to 1000

Sync terminal
JIS sync terminal provided as standard, with lock screws

Accessory shoe
Hot-shoe contact (sync contact, ready-light contact, monitor contact, stop-signal contact for TTL flash) with a lock hole to prevent accidental dropping

Ready light
Lights when the flash is fully charged with SB-28, SB-27, etc.; blinks for full-output warning or shutter-speed settings from 1/500 to 1/4000 sec.

Camera back
Detachable hinged back; MF-16 Data Back can be attached in place.

Camera-back opening
Achieved with the film-rewind lever

Power source
One 3V lithium battery (CR-1/3N type), two 1.55V silver-oxide batteries (SR44 type), or two 1.5V alkaline batteries (LR44 type)

Meter-on timer
To turn the camera on when the shutter-release button is pressed lightly, turning it off 16 seconds after your finger leaves the button. With the MD-12 Motor Drive, the camera is turned on when the shutter release button of the MD-12 is pressed lightly, and it turns off approx. 66 seconds after your finger leaves the button.

Battery power check
Displayed for 16 seconds with the meter-on timer. The exposure meter does not work if the batteries are exhausted.

Number of film rolls that can be shot
When repeating the procedure of holding the shutter-release button in the lightly pressed position for 10 seconds, pressing it all the way, and waiting until the timer activates, with 36-frame film rolls, a shutter speed of 1/250 second in Aperture-Priority Auto mode:   At normal temperature (20°C) At low temperature (-10°C)
One 3V lithium battery approx. 110 rolls approx. 60 rolls
Two 1.55V silver-oxide batteries approx. 120 rolls approx. 65 rolls  
Two 1.5V alkaline batteries approx. 50 rolls approx. 10 rolls

Optional exclusive or common accessories
MD-12 Motor Drive
SB-28 Speedlight and equivalents
MF-16 Data Back
CF-27S / CF-28S / CF-29S Camera Case
AR-3 Cable release

Tripod socket
1/4 (ISO 1222)

Dimensions (W x H x D)
Approx. 142.5 x 90 x 58mm (camera body only)

Weight
Approx. 570g (camera body only, including battery)

All specifications apply when fresh batteries are used at normal temperature (20°C).

Specifications and designs are subject to change without any notice or obligation on the part of the manufacturer.

在http://www_klt_co_jp/Nikon/35mm/index_fm3a.htm看到了，但没有特别注明：没有电池可以实现全机械快门档位。
Exposure control Aperture-Priority Auto and Manual
Shutter speed Stepless from 1/4000 to 8 sec. on Aperture-Priority Auto; mechanical 1/4000 to 1 sec., plus B on Manual

TO 西老：
混合快门，俺知道的有C的F-1NEW，P的LX，N的FE2，FA，F3，其特点是：
1，同电子比（同一机器），机械缺慢门机械档，所以称部分而非全程。
2，这些老混合快门缺慢门机械档的命门在于机械阻尼机构复杂，所以省略掉。

俺特别欢迎电子/机械速度档位可以全程切换的新混合快门问世，俺是技术的追随者，不管是N还是C，统统欢迎，呵呵。

大家有没发现，这个FM3A的倒片扳手也是没菱角的

FM2 和FE2 二合一 太爽了！

混合快门早就有了：

CANON F-1 NEW从8~1/60是电子控制，1/125以上和1/90是机械的；
PENTAX LX从1/60及以下是电子，1/75以上是机械的，

所以这不算奇事，NIKON敢于宣布这是第一台全功能混合快门，就是有电没电都是全部能控制的。这类快门装到F5、F6上是意义不大的，因为那些是AF机，总要有电才有用。

到www_nikon_com看看吧，那里已经正式宣布了。

最近俺没有去NIKON网站，俺只是凭经验说说，俺觉得这种全新的全功能混合快门（全机械/电子切换），一以前没有见谁家有过；二实现起来困难，电子快门是无级，时钟电路控制，电磁释放；全机械是发条、弹簧、齿轮等机构实现有级，两者还要设计在一起，佩服！三如果有，应该装备在F4，F5这种顶级机上，想当年F4保留的手动退卷机构，绝对是专业思想。
俺在没有见到正式产品消息之前，暂时保留自己的看法，俺也衷心祝愿N能够有这样的新产品，这种快门可以说是极其理想的快门，具备划时代的意义，起码可以结束机械/电子快门之争。

AE和混合快门没多大14，除非和FM2一个价位否则没太大吸引力，怎么没加个点测？

汽水：送给你...

俺将这些传统的已经翻译成中文了，数码的还没翻译，积极性不太高。

FM3A

新镜头

SB-50DX

看来这个FM3A有点意思，全混合快门，全金属机身，估计便宜不了；

镜头就只有那个饼干有点意思；

SB-50DX是一支偏向广角的闪光灯，指数不算高，大约相当于22指数，不能摇头幌脑，作副灯是很好的，有点类似M 的3500xi，但功能多了不少，有内置灯的柔光片，也想得出来。

打搅人家做梦不好哟

FM3A的面世意味着FE2的再生，这主要归功于F3的停产。

ATX340, 别高兴得太早了, 有合适的FE2的话还是要下手的啊.