The calculator will then do the calculation 50 / 1.53 = 32.68 = 33 mm, meaning you would need a lens with a focal length of 33 mm, so the image is equivalent to one formed with a 50 mm full-frame lens. To calculate the f-stop needed it does 4 / 1.53 = 2.61 = f/2.6. So the aperture f-stop to get the same depth of field would need to be f/2.6. for: P P = pixel number; f f = focal length of the lens on the crop body; N N = f-number of the lens on the crop body; and c c = crop factor. Thus, C would have a shallower DOF than that of a FF when using FF equivalent lens, when: PFF Pc > c. P F F P c > c. For example the Pentax K100D has 6 megapixels with an APS-C sized sensor, comparing to 7. Check the figures. Or you can switch to manual focus and use an app like Field Tools to work out the hyperfocal distance. This places distant objects at the far limit of depth of field, and so maximises the depth of field. At a focal length of 55mm and aperture of f/16, our app says we need to focus at 9.5m…. A girl in a field seems like an appropriate photo to use when discussing depth of field…. Nikon D810 camera settings: f6.3, 70 – 200mm lens at a focal length of 190mm. How do you control depth of field (DoF)? When taking a photo, to increase or decrease the area in focus, you need to know what controls depth of field: Aperture; Magnification This is because Depth of Field is not just a function of aperture. Instead, aperture works together with a lens’s focal length, the amount of space between a camera and its subject, and the Circle of Confusion to create Depth of Field. This means to fully understand Depth of Field, a basic understanding of the way a lens works is required. fHGDW0t.

how to do depth of field