There are four main factors that control depth of field: lens aperture, lens focal length, subject distance, and sensor size. Your sensor is pretty well set, so you won’t have much luck changing that. Your focal length and distance to the subject are usually determined by your choice of composition. So the lens aperture is your primary

Well, depth of field is defined as the distance between the nearest and the farthest objects that are in acceptably sharp focus in an image. So, basically it's what's in focus within the frame you're shooting, to put it really, really simply. Today, I want to specifically target deep depth of field.

Depth of Field is primarily controlled by camera aperture or f-stop with the depth of field being inversely related to aperture size. A wider aperture which corresponds to a smaller f-stop number (f-2.8 – 5.6) yields a shallow depth of field. In other words, a selective focus point with more of the photo being out of focus.
The distance in which the depth of field effect should be sharp. This value is measured in Unreal Units (cm). Depth Blur km for 50%. Defines the distance at which the pixel is blurred with a radius half of the Depth blur Radius. This is particularly useful to emulate cheap atmospheric scattering.

This span of acceptable sharpness is what we term depth-of-field (DOF). Focal length of the lens – shorter more DOF – longer less DOF 1. f/# - Lower aperture number (larger opening) less DOF 2. f/# - Higher aperture numbers (smaller opening) more DOF 3. Subject distance – The further the subject the more DOF 4.

ALEJANDRO PEREZ SANCHEZ. In this lesson, we are teaching you how to render depth of field by adjusting our camera settings, render settings and as a bonus using a cloud FX to make things feel even further away! I hope this helps you out with rendering out more interesting shots.
Step 9 – Using Depth Map. To use the Depth Map, all you have to do is retrieve the selection from the Alpha Channel. To do this, CTRL/CMD + Click on the alpha channel, once the selection is active, now I can blur the background to make it out of focus. So, with the selection active, go to Filter > Blur Gallery > Field Blur to blur the background.
Step 1. Before we begin, we need to make sure that we change our renderer to V-ray. Bring up the Render Setup window, go to the Common tab, and then scroll down to the bottom where it says Assign Renderer. Click the button to the right of the Production line and choose V-ray in the dialog box that pops up. Click Ok. To use this feature, open your image in GIMP and duplicate the background layer. Then, go to Filters > Blur > Focus Blur and adjust the blur radius, shape, noise, and depth map. If you want to .
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    • how to do depth of field