Who invented the SLR camera

In the early 1990s, Canon took the lead in developing "eye-controlled focusing" and applied it to cameras. At this stage, the theory of optical transfer function was applied to the field of optical design, and a photographic lens with high imaging quality, good color reproduction, large aperture and small distortion appeared. The wide application of a series of advanced technologies, such as multilayer coating technology, aspheric lens, image balance principle, electronic technology and microcomputer, makes the development of 135 single-lens reflex camera change with each passing day.

In Dresden 1936, Germany, the world's first 135 single-lens reflex camera-Kine Exkta was developed. It adopts a top view, which indicates the arrival of the SLR era.

1948, Germany produced the world's first pentaprism 135 SLR camera-CONTAX) S camera, which is the prototype of modern 135 SLR camera. However, the above two cameras have low practical value because the mirrors cannot be automatically reset. It was not until 1954 that Asahi Optical Industry Co., Ltd. solved the automatic reset problem of the reflector on an Asahi Pentax camera.

1960, Konica F camera used the metal curtain shutter for the first time, which made the shutter move faster and have a longer service life.

197 1, Pentax ES camera first had the function of aperture priority and automatic shutter. In 1976, Canon AE- 1 camera introduced shutter priority and automatic aperture function. At the same time, there has also been a debate about "which comes first?" In order to make up for this shortcoming and put an end to the controversy, Minolta launched the world's first dual-priority automatic exposure camera-Minolta XD-7/KOOC-0/35 SLR at/KOOC-0/977. There is a precedent that the same camera has multiple exposure functions.

In 1978, Canon AE- 1 and Progzam introduced the program automatic function.

In 1980, Nikon F3 camera integrates the functions of average metering, spot metering, automatic program, double priority and manual operation, which is of epoch-making significance in the history of 135 SLR.

1982, the rare metal titanium alloy shutter was first used on Nikon FM2 camera, which made the shutter speed as high as 1/4000 seconds.

1984, Konica TC-X camera was equipped with DX coding system for the first time.

Following 198 1 year, Asahi Optical Industry Co., Ltd. launched the world's first autofocus SLR camera-Pentax ME-F, and Minolta produced the world's first autofocus function, multi-mode automatic exposure function, manual exposure function and electric automatic film feeding function in 1985. 1986 α-9000 camera has realized the automatic exposure function, thus opening the curtain of modern autofocus camera production.

1989, Canon installed an ultrasonic motor on the matching lens of EOS- 1 camera, which realized the function of low noise, high speed and predictive autofocus.

There should be:

Although EXAKTA designed the world's first SLR camera, the most fundamental pentaprism structure of modern SLR cameras was invented by CONTAX. If there were no World War II, Nikon Canon would have to pay royalties to CONTAX for each SLR camera, so we usually think that CONTAX S is the originator of modern SLR cameras. Looking back at the whole history, Nikon Canon basically didn't play a key role. It is those companies that have closed down or are on the verge of closing down that bring forth new ideas and make continuous progress, such as Contex, KONICA and Minolta. Please remember these legendary names.