焦点 - 超焦距计算器 - 景深

Still thinking about buying a new lens? Still need to do math calculations to take the perfect shot?

Use this depth of field and circle of confusion calculator to simulate out-of-focus blur. Calculate different camera settings using depth of field and hyperfocal distance, including the diffraction effect of small apertures. Blur values are measured in pixels of the camera sensor. The blur simulation shows the blur levels for infinity and the subject, as seen on a 25 cm or 10-inch printout or screen.

Tap on the magnifying glass to switch to the full-frame view to evaluate the subject size and switch to the 1/10 frame view to evaluate the blur.

Available parameters are: *Distance* - distance to the subject, *Lens type* - focal length, *F-ratio* - aperture adjustment, *Focus distance* - distance at which the lens is focused, *Sensor* - megapixel count of the matrix and camera sensor size.

You can use the *Hyperfocal* mode to set the focus value for the current F-number to the hyperfocal distance.

If you want both the subject and infinity to be in focus, use the *Auto hyperfocal* mode, which will find the minimum F and the corresponding focus value. *Auto hyperfocal* tries to achieve the best possible result, but due to the diffraction effect of small apertures, it may not always result in a sharp image, and the simulation will reflect this.

The last smart feature is *Max blur focus* - given the subject distance and F-number, it will suggest the closest focus value that will keep the subject in focus while maximizing the blur in the background. This idea is opposite to hyperfocal photography - here your focus is between the camera and the subject, and the depth of field ends at the subject plane, ensuring maximum blur in the background for a given F-number. This is useful when forced to use a relatively high F-ratio and there are no other objects closer to the camera than the subject in the frame.

The *Circle of confusion* used for depth of field, smart focus, and max blur calculations is the sensor diagonal divided by *1730*, which is the so-called Zeiss formula.

If you have any questions, suggestions, or have found an error, please feel free to write to us at: support@strelka.hk