Why does the medium format SLR have poor focusing and poor video shooting?

Medium format SLR has poor focusing and poor video shooting, because it can't focus automatically after using manual focusing lens or switching manual focusing mode MF, and it can't focus automatically beyond the nearest focusing distance of lens. If the light is too dim, autofocus will fail. If the subject is single in color, such as cloudless sky and white wall in Wan Li, autofocus will fail. If the lens or fuselage hardware fails, autofocus will fail. Medium frame, also known as medium frame, 120 frame means that the sensor size of the camera is 120 frame. The common specifications of sensor size of medium format camera are 6x45, 6x6, 6x9, etc. And there are less common 6x7 specifications, but the imaging of this specification is more delicate.

Advantages and disadvantages of media format

In the film age, the quality of the lens is mainly reflected by the quality of the photos. Compared with the DSLR, the image fineness and bright color of the medium format film camera are better than those of the Quan Huafu DSLR, but at the same time, the DSLR is far better than the medium format camera in terms of easy operation, photo storage and management.

With the popularity of digital SLR cameras among the public and the continuous improvement of the production technology of SLR cameras by major manufacturers, the camp of digital SLR cameras has been growing in the field of civil high-end digital cameras. However, in the field of commercial photography, the structure and imaging software technology of digital SLR cameras are still immature, and the details and colors of the imaging level of sensor equipment are still far from those of professional large-format cameras, so the living space and life span of large-format cameras will not be greatly affected.

Compared with 135 format single electric reflex camera, most of the current 120 format cameras are film cameras, and the image quality obtained by 135 format single electric reflex camera can't be achieved. 120 format digital camera is more expensive and more comprehensive than 135 format SLR, which is not only available in ordinary civil photography. Thanks to the excellent difference between 135 SLR camera software layer image processing mode, 120 format can also achieve perfect results in commercial shooting with high quality requirements.