原文由 云淡风高 发表
Wata的一个测距仪好用吗？

原文由 熊看 发表
还有介个——

原文由 utah 发表
ｉ

估计是哪几片玻璃比较值钱，呵呵．．．

原文由 晓巴 发表

对就是它，直筒式取景器。别看这个小玩意儿比起测距器简单多了可价格是测距器的20-40倍，偶买不起啊

原文由 utah 发表

是不是这个(也是老古董了)：

WEISU(1933)-For 3.5cm ELMAR. Earlier ones has a flared front end and were avaliable in black and chrome, later ones...

对就是它，直筒式取景器。别看这个小玩意儿比起测距器简单多了可价格是测距器的20-40倍，偶买不起啊

原文由 晓巴 发表

你说的“FODUA”我大概明白了，每个徕卡的附件都有自己的名字，比如给我的 LEICA E 相机配的35毫米取景器叫 “WEISO”。

WEISU(1933)-For 3.5cm ELMAR. Earlier ones has a flared front end and were avaliable in black and chrome, later ones...

原文由 firelight 发表
有一个柯达的,不准了,怎么调?

原文由 utah 发表

我这一支是不是1923年产的无从考证，但这个型号的确是23年开始生产的，那个时候好像还不是leitz的牌子，还是“FODUA”。

原文由 晓巴 发表

你这个可真是宝贝了，23年的东西保存这么完好，皮套看上去还很新。

23/24年间可是 Leica 0 系列的年代，继巴纳克的三个试验机后的全世界第一批35毫米照相机，你这个可是35毫米相机的祖宗机型上用的啊 25年才有真正的商品化 Leica Ia 上市。

原文由 utah 发表

晓巴兄是估焦高手，也玩过这个呀。。。呵呵

原文由 utah 发表
秀一下我压箱底的宝贝。

1923年的东西，都算我的爷爷辈了，呵呵。。。

虽然里面有些灰尘，但转动转盘时那个如丝般顺滑的感觉真是然我对那个时候的机械工艺水平佩服。

原文由 晓巴 发表
精致，很好玩。Leica II 系之前的都用这类玩意儿测距。

原文由 原上草 发表
用苏联测距器的70码飘过.........

The Kodak Service rangefinder has an elegant design. The distance scale is on the front and the distance is read inside the finder. Instead of merging images, this finder merges a split image like an SLR. Accurate to 3 feet. This finder cannot be calibrated by the photographer. In the sample I bought, the materials used in the optical system yellowed and darkened making the rangefinder unusable. This mounts vertically in the camera flash shoe.

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Walz rangefinders were modeled after Leice finders of the period except they came in bright colors. A shoe was mounted in the camera's flash shoe and the finder slides into the shoe. This allowed the rangefinder to be swung to the side so the shutter speed dial could be used. It also made taking off and mounting the rangefinder easy. Of course, many shoes have been lost so make sure one comes with the rangefinder - a problem with the Leica model too. The two silver caps covering the alignment screws on the top are also know to fall off and can be missing. Distance scale in feet and accurate to 3 feet. Cannot be adjusted by the photographer.

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Accurange is a cheap rangefinder with an interesting design. The distance scale can be calibrated by the photographer. The sample I bought was in bad shape. I do not know if this is usual for these rangefinders, but I was not impressed by the construction. Maybe someone else had better luck.

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The only two rangefinders I have now are the Watameter I and Amsco DeJur. The others I sold for one reason or another. I would also recommend Medis, Walz, and Leica. The Ideal is a good deal and a good finder regardless of its construction. If you can get a clear Kodak Service rangefinder, then they appear to be excellent as well. Small rangefinders like the Bodan are cute and can be used with normal and wide-angle lenses quite well, but the Watameter is not much bigger and you can easily calibrate it. Be careful with Accurange.

When buying rangefinders, vertical alignment is important especially if it cannot be adjusted by the photographer. Be careful of sellers claiming ignorance of how the finder works. Some really don't know, but some don't want to know.

The Medis rangefinder is a high-quality German unit. The base is similar to the Watameter. The distance scale can be calibrated. Accurate to 3 feet.

Rangefinders can come in very small packages. The Boden from Germany is very cute. This model was also sold under different names and the distance scale can be in feet or meters. Accurate to 1m. The scale can be calibrated, but not vertical alignment. This particular sample had a vertical alignment problem.

50 years ago accessory rangefinders were quite common. A rangefinder is a device to determine the object distance. Most contempory rangefinders are incoroprated into the camera viewfinder as found in the Leica. But there are cameras that require the photographer to guess the object distance and set the focusing scale on the lens accordingly. The accessory rangefinder is a device to help increase the accuracy of that process.

Accessory rangefinders can be handheld or mounted directly on the camera. Two basic rangefinder designs were used. A horizontal design with a shoe mounted in the center as shown on the top of the camera below. Or a verticle design where the end of the rangefinder slid into the flash shoe as shown attached to the bracket to the left of the camera.

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The rangefinder is simple to operate. Simply look though it and turn the distance scale until the two images in the finder merge. The problem with rangefinders is the mirrors can go out of alignment. A problem with virtical alignment will merge images together from left and right, but one appears above the other. For horizontal targets, this is no problem and the rangefinder can be accurate. For diagonal lines, this will cause measuring errors. Some finders like the Watameter (the lower finder) will let you adjust vertical alignment, finders like the Amsco DeJur (the top finder) could only be aligned professionally. However, if you feel confident, most rangefinders can be aligned by either taking it apart or using a few external screws on the body.

Most scales are in feet. Some like the Watameter (the lower finder), are in feet and inches. It is possible to find rangefinders calibrated in meters but they are rarer. Some meters like the Watameter allow the distance scale to be calibrated. The usual minimum object distance for thses devices is 3ft / 1.0m

Watameter was a German manufacturer of a very good series of rangefinders. They had three models. The Watameter I pictured below has an external distance scale from 22 inches to infinity. The Watermeter II has the same appearance and specifications, but the distance scale is read inside the finder. The Watameter Super uses an internal scale for distances between 22 inches and infinity and an external distance scale from 12 to 20 inches. All Watameter rangefinders can have the vertical alignment and distance scale calibrated by the photographer.

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The accuracy of the rangefinder is dependant on the length of the base - the distance between the two front windows. Most rangefinders are designed for normal or wide-angle lenses with maximum apertures of f/2.8 or smaller. Rangefinders become less accurate with longer focal length lenses and wider apertures. Generally the maximum focal length is 135mm at a maximum object distance of 1.5m.

The Amsco DeJur rangefinder (top finder) is a solid accurate rangefinder. Modeled after the Leica rangefinders, an Amsco is far less expensive on the used market. While it is difficult to calibrate the DeJur by yourself, my finder has not needed it. It is also an easy rangefinder to handhold. Since a Leica rangefinder usually sells at auction for $150 to $250, the Amsco in good condition is a real bargin and can be picked up from about $30 to $60. The minimum focus distance is 2.6 feet.