请教一下双反的“CORD”和“FLEX” 是什么含义。

请各位老师赐教。

雅西卡能有啥危险

雅西卡
flex，cord，mat 都有啊。 flex，cord在双反中应用比较普遍吧，除了雅西卡之外，美能达、奥巴、理光都有如此后缀。 本帖最后由 woshixiaobai 于 2021-5-21 14:01 编辑

除了Rollei，还有哪家是用flex和cord后缀来区分自家TLR的两个等级的？

另外，除了flex，cord，还有mat也是双反产品常用的后缀之一。

基本上可以这么说。
针就rollei TLR来说，4片天塞总体来说表现不如高端机器上6片的普兰纳或者xenotar，但是就反差和通透度来说，4片天塞还是具有优势的。正所谓尺有所短，寸有所长。 本帖最后由 不拍 于 2021-5-21 09:22 编辑

和现在卖器材也是一样，厂家按档次精准定位，若以rollei为例，低端机是方方面面都不如高端机，包括镜头。 低端机存在的优点廉价，轻（因为减了功能）。



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如果你的叙述前面加一个“大多数情况下”，或者“一般来说”，那么我就完全同意了。
4片镜有4片镜的优势，甚至3片白头都有自己的优势，想必老兄是知道的。 本帖最后由 不拍 于 2021-5-21 02:16 编辑

高级机性能和配置都高级一些，用起来方便一些。 同厂的高级机和低级机比较，高级机一定比低级机强，而且不论怎样调光圈，低级机都弱于高级机。



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雅西卡的资料不让发了被拦截了，说有危险。

主流TLR的镜头都非常棒，不过既然玩到了TLR，风格的差异应该考虑一下。
如果拍拍黑白景物，那么所谓的高级机（Rolleiflex Planar/xenotar)，低级机(Rolleiflex T/Rolleicord)其实是各有千秋，各有长短，不能一概而论地说高级机一定比低级机强；
如果开大光圈使用，那么所谓的高级机会更合适一些。

------Minolta Autocord--------

Autocord RG I
image by Aldo Rafael Altamirano (Image rights)
Twin-lens reflexes bearing the Minolta name had been offered as early as 1937, starting with the Minoltaflex (I). However, by the mid-1950s, the Japanese TLR market had become quite crowded. The Minolta Autocord series was an effort by Chiyoda Kogaku Seiko, K.K. to compete in the premium-quality segment of the TLR market.

The Autocord series went through a large number of minor variations during its lifespan between 1955 and 1966—at least 17, by one count.[1]

All shared a number of desirable features: crank film advance with automatic shutter cocking and frame counting; a highly regarded Tessar-type 4-element Rokkor f/3.5 lens; self-timer; slow shutter speeds, down to 1 second; and an override button, allowing the advance crank to rotate backwards and cock the shutter without advancing the film, permitting double exposures. Early Optiper shutters only had speeds to 1/400 sec., but this was increased to 1/500 in later versions.

These features compared well with a Tessar-equipped Rolleiflex of the day, yet Autocords sold at a subtantially lower price. Both meterless models and ones including a light meter (originally selenium; later, CdS) were offered in parallel throughout the series.

Many versions of the Autocord feature some form of EV number scale around the taking lens to assist with exposure settings. Some metered models use a quirky system where the shutter and aperture indicators each point to a different row of integers; the photographer was intended to mentally add these two numbers until they equaled the EV indicated on the light meter. A 1957 magazine ad proclaimed, "Your wife or child could have done it—even without looking at the f/stop or shutter speed numbers."[2] Despite this appeal to the male ego, the system was never adopted by any other camera maker, and no doubt perplexes Autocord purchasers today who are missing the original manual.

Autocords use a focus lever that protrudes from below the lensboard. Some photographers have noted the ergonomic advantage of this design compared to knob-focusing TLRs such as the Rolleiflex, as it is not necessary to shift the camera between hands for focusing versus winding. But the metal of the Autocord lever is brittle and vulnerable to breakage—the one notable weak link in these otherwise excellent cameras. This focusing mechanism is also found on all postwar Flexarets, beginning in 1945, according to McKeown.

This Minolta Autocord I is a late model among the popular Autocord series of TLR (Twin Lens Reflex) medium-format cameras. It was first introduced in 1965. This meterless camera is equipped with a Citizen-MVL shutter and a Minolta Rokkor 1:3.5 f=75mm taking lens. Autocord II added 220 film compatibility. The counter can can only go up to 12, but can be reset to begin at 1 for exposure 13-24, this can be done with a slider knob on the crank side of the body. The film chamber had a pressure plate for selecting 12 or 24 exp. The Autocord III is similar to previous but adds a 24 exposure counter. Rotate the dial to the correct exposure number. The corresponding meter versions was known as the Minolta Autocord CDS, Autocord CDS II and Autocord CDS III. The name plate has been replaced with the meter reading unit. It has three settings, off, low and high. This can be adjusted by rotating the round lens sensor dial on left hand side. It uses the RM-1R 1.4v mercury battery which is located on the right dial. There is a BC button to check the condition of the battery. On the left hand side of the body, the meter display has ISO selection of 6 to 25,000 ASA.

我不太了解， 不过听说也是相当棒的机器。
网上的一些资料，我发一下，如果能发出去的话，给你参考。

价格很直观啊。谢谢。

如果是日系的雅西卡、美能达，这个规律也还存在吗？

就Rollei而言，FLEX一般配置较高，结构更复杂；过片上玄一次完成，多数配置5片和6片镜头。
而CORD结构简单而可靠，一般采用4片镜头，小光圈拍黑白成像效果也非常牛X。 本帖最后由 不拍 于 2021-5-20 03:31 编辑

您客气了。哪个更高级看价格就知道了，就禄莱而言Flex更高级。

不只是禄来。
雅西卡、美能达  都分FLEX和CORD。

谢谢您。 那么比较来说FLEX和CORD哪种更高级呢？

FLEX 是双镜头反光结构“Twin Lens Reflex”中Reflex的最后四个字母，Rolleiflex: "Roll" = rollfilm. "ei" =Heidecke. "flex" = reflex.

CORD是影像记录“Photo Record”中Record的最后四个字母，Rolleicord: "Roll" = rollfilm. "ei" = Heidecke. "cord" = Record.

好像 CORD 是禄来的低端，FLEX是禄来的中高端