Ma Genan photographer Bruce Gilden's street video, doesn't he need accurate focus?

h TTP://xjada . blog . Sohu . com/32559057 . html

Hyperfocal distance shooting method

Hyperfocal distance is a fast shooting method without focusing. To put it simply, with a lens (preferably below 50mm), first adjust the appropriate shutter speed (I personally prefer 1/60s), then narrow the aperture as much as possible and adjust the distance of the lens focus ring to the mark of infinity. In this case, the image with the lens several meters away is clear, or it is called acceptable blur. Pay attention to changing the focus mode and metering of the camera to manual.

Not to mention the depth of field theory. For example, on a sunny day, a paraxial (SLR is also acceptable) camera, a 28mm fixed-focus lens, a black-and-white negative, 2 1, a speed 1/60s, f22, and an infinite focusing distance. In this case, all objects except 1 m are clear, or called acceptable blur.

Hyperfocal distance's calculation has a formula, but it's not that troublesome. For example, for a 28mm lens, the constant is 22, and this constant divided by the current aperture is the distance of hyperfocal distance. 35mm is 32, and 50mm is 64. Specific calculation methods and common constants can be found in this webpage.

I often use this method to sweep the street, but I dare not turn on the flash as boldly as in the video ... hehe!