Come in, master! ! The difference between focal plane and photographic lens! !

Compared with camera lens, the resolution of film camera lens is not high, but the contrast on the focal plane is great. That is, the definition is relatively high.

The focal plane has a large aperture, and the imaging quality with large aperture is still excellent. Moreover, the main difference between focal plane and camera lens is that the aperture can be changed at will. That is to say, there is no specific and clear reduction of the first gear and the second gear, but the aperture can be closed at will, between the two gears.

There are not many manufacturers producing camera lenses in the world. Carl zeiss of Germany specializes in producing lenses for Alai, a German film machine, while Atong of France seems to produce his own lenses. And it seems that Pan Shen also made his own lens in America.

Whether the lenses can be interchanged, you can search online whether you can't focus at infinity.

If you want to see more things, you can go to my blog: /bjphotographer.

Supplementary question:

Technical problems are not necessarily superb. Most importantly, the demand for focal plane is too small, and the development team is not short of people. If the demand is large, the cost will drop quickly. At least not as outrageous as it is now.