What's the difference between APS-C and Quan Huafu?

The sensor size of APS-C format SLR is about 24* 16mm, and the Quan Huafu size is about 36*24mm. There is a slight difference of a few tenths of a millimeter between different machines.

In other words, the sensor area of Quan Huafu SLR is twice that of APS SLR. In the case of similar pixels, the unit pixel per inch of Quan Huafu SLR is lower than APS, and the area occupied by a single pixel is larger, so the picture quality is better.

Extended data

The original meaning of APS is "advanced photography system". It is a transitional product before the popularization of digital cameras. It still uses film, but it records a lot of relevant data on film and cassette through magnetic materials and digital plans.

Nowadays, most digital SLR cameras use CCD or CMOS photosensitive devices with specifications less than 135. Except Olympus system and Nikon Quan Huafu, they are almost the same size as APS-C film. For the convenience of description, people call photosensitive devices with similar sizes "APS-C specification".

Many digital monocular cameras also use this kind of sensor, some consumer digital cameras also use this kind of specification, and some monocular cameras also use this kind of specification. However, the exact dimensions of APS-C sensors are not the same. This makes the viewing angle of APS-C narrower than the full width at the same focal length.

References:

Baidu encyclopedia-APS format