DofCalc visualizes the near and far limit depth of field given a specified lens focal length, aperture, filmback size, and focus distance. Useful for visualizing plausible focus ranges given a matchmove camera and lidar scan.

DofCalc.nk

set cut_paste_input [stack 0]
push $cut_paste_input
Group {
 name DofCalc
 label "<left>\nfocal length: \[format \"%.0f\" \[value f]]\nf-stop: \[format \"%.2f\" \[value N]]\nsubject dist: \[format \"%.2f\" \[value s]]\n\nhyperfocal dist: \[format \"%.2f\" \[value H]]\n---------------------------\ndof: \[format \"%.2f\" \[value dof]]\ndof near: \[format \"%.2f\" \[value Dn]]\ndof far: \[format \"%.2f\" \[value Df]]"
 addUserKnob {20 DofCalc}
 addUserKnob {4 depth_unit l "depth unit" t "Set your depth unit" M {mm cm dm m inch ft}}
 depth_unit ft
 addUserKnob {41 s l subject_distance T VAR.s}
 addUserKnob {41 f l focal_length T VAR.f}
 addUserKnob {41 N l f-number T VAR.N}
 addUserKnob {41 c l "coc limit" t "The smallest circle of confusion to be treated as a point in mm" T VAR.c}
 addUserKnob {41 H l hyperfocal_distance t "The hyperfocal distance in Meters" T VAR.H}
 addUserKnob {41 Dn l dof_near T VAR.Dn}
 addUserKnob {41 Df l dof_far T VAR.Df}
 addUserKnob {7 dof l dof_range R 0 100}
 dof {{Df-Dn}}
}
 Camera2 {
  inputs 0
  xform_order {{"\[topnode input0].knob.xform_order"}}
  rot_order {{"\[topnode input0].knob.rot_order"}}
  translate {{"\[topnode input0].translate.x"} {"\[topnode input0].translate.y"} {"\[topnode input0].translate.z"}}
  rotate {{"\[topnode input0].rotate.x"} {"\[topnode input0].rotate.y"} {"\[topnode input0].rotate.z"}}
  scaling {{"\[topnode input0].knob.scaling"} {"\[topnode input0].knob.scaling"} {"\[topnode input0].knob.scaling"}}
  uniform_scale {{"\[topnode input0].knob.uniform_scale"}}
  skew {{"\[topnode input0].knob.skew"} {"\[topnode input0].knob.skew"} {"\[topnode input0].knob.skew"}}
  pivot {{"\[topnode input0].knob.pivot"} {"\[topnode input0].knob.pivot"} {"\[topnode input0].knob.pivot"}}
  projection_mode {{"\[topnode input0].knob.projection_mode"}}
  focal {{"\[topnode input0]knob.focal"}}
  haperture {{"\[topnode input0].haperture"}}
  vaperture {{"\[topnode input0].vaperture"}}
  near {{"\[topnode input0].knob.near"}}
  far {{"\[topnode input0].knob.far"}}
  win_translate {{"\[topnode input0].knob.win_translate"} {"\[topnode input0].knob.win_translate"}}
  win_scale {{"parent.stabilize == 1 ? parent.overscan_percentage : 1"} {win_scale.u}}
  winroll {{"\[topnode input0].knob.winroll"}}
  focal_point {{"\[topnode input0].knob.focal_point"}}
  fstop {{"\[topnode input0].knob.fstop"}}
  name cam_dof
  selected true
  xpos -360
  ypos -270
 }
 Dot {
  name Dot6
  note_font_size 42
  note_font_color 0x7f7f7f01
  xpos -337
  ypos -50
 }
set N69da130 [stack 0]
 Constant {
  inputs 0
  color {0.2 0 0 0}
  name Constant8
  xpos -481
  ypos -101
 }
 Card2 {
  image_aspect false
  control_points {3 3 3 6 

1 {-0.5 -0.5 0} 0 {0.1666666865 0 0} 0 {0 0 0} 0 {0 0.1666666865 0} 0 {0 0 0} 0 {0 0 0} 
1 {0 -0.5 0} 0 {0.1666666716 0 0} 0 {-0.1666666716 0 0} 0 {0 0.1666666865 0} 0 {0 0 0} 0 {0.5 0 0} 
1 {0.5 -0.5 0} 0 {0 0 0} 0 {-0.1666666865 0 0} 0 {0 0.1666666865 0} 0 {0 0 0} 0 {1 0 0} 
1 {-0.5 0 0} 0 {0.1666666865 0 0} 0 {0 0 0} 0 {0 0.1666666716 0} 0 {0 -0.1666666716 0} 0 {0 0.5 0} 
1 {0 0 0} 0 {0.1666666716 0 0} 0 {-0.1666666716 0 0} 0 {0 0.1666666716 0} 0 {0 -0.1666666716 0} 0 {0.5 0.5 0} 
1 {0.5 0 0} 0 {0 0 0} 0 {-0.1666666865 0 0} 0 {0 0.1666666716 0} 0 {0 -0.1666666716 0} 0 {1 0.5 0} 
1 {-0.5 0.5 0} 0 {0.1666666865 0 0} 0 {0 0 0} 0 {0 0 0} 0 {0 -0.1666666865 0} 0 {0 1 0} 
1 {0 0.5 0} 0 {0.1666666716 0 0} 0 {-0.1666666716 0 0} 0 {0 0 0} 0 {0 -0.1666666865 0} 0 {0.5 1 0} 
1 {0.5 0.5 0} 0 {0 0 0} 0 {-0.1666666865 0 0} 0 {0 0 0} 0 {0 -0.1666666865 0} 0 {1 1 0} }
  name Card5
  xpos -481
  ypos -5
 }
 TransformGeo {
  inputs 2
  translate {0 0 {-parent.VAR.Df}}
  scaling {{(parent.cam_dof.haperture/parent.cam_dof.focal)*-translate.z} {(cam_dof.vaperture/cam_dof.focal)*-translate.z} 1}
  name TransformGeo5
  xpos -481
  ypos 43
 }
push $N69da130
 Constant {
  inputs 0
  color {0 0 0.2 0}
  name Constant7
  xpos -591
  ypos -101
 }
 Card2 {
  image_aspect false
  control_points {3 3 3 6 

1 {-0.5 -0.5 0} 0 {0.1666666865 0 0} 0 {0 0 0} 0 {0 0.1666666865 0} 0 {0 0 0} 0 {0 0 0} 
1 {0 -0.5 0} 0 {0.1666666716 0 0} 0 {-0.1666666716 0 0} 0 {0 0.1666666865 0} 0 {0 0 0} 0 {0.5 0 0} 
1 {0.5 -0.5 0} 0 {0 0 0} 0 {-0.1666666865 0 0} 0 {0 0.1666666865 0} 0 {0 0 0} 0 {1 0 0} 
1 {-0.5 0 0} 0 {0.1666666865 0 0} 0 {0 0 0} 0 {0 0.1666666716 0} 0 {0 -0.1666666716 0} 0 {0 0.5 0} 
1 {0 0 0} 0 {0.1666666716 0 0} 0 {-0.1666666716 0 0} 0 {0 0.1666666716 0} 0 {0 -0.1666666716 0} 0 {0.5 0.5 0} 
1 {0.5 0 0} 0 {0 0 0} 0 {-0.1666666865 0 0} 0 {0 0.1666666716 0} 0 {0 -0.1666666716 0} 0 {1 0.5 0} 
1 {-0.5 0.5 0} 0 {0.1666666865 0 0} 0 {0 0 0} 0 {0 0 0} 0 {0 -0.1666666865 0} 0 {0 1 0} 
1 {0 0.5 0} 0 {0.1666666716 0 0} 0 {-0.1666666716 0 0} 0 {0 0 0} 0 {0 -0.1666666865 0} 0 {0.5 1 0} 
1 {0.5 0.5 0} 0 {0 0 0} 0 {-0.1666666865 0 0} 0 {0 0 0} 0 {0 -0.1666666865 0} 0 {1 1 0} }
  name Card4
  xpos -591
  ypos -5
 }
 TransformGeo {
  inputs 2
  translate {0 0 {-parent.VAR.Dn}}
  scaling {{(parent.cam_dof.haperture/parent.cam_dof.focal)*-translate.z} {(parent.cam_dof.vaperture/parent.cam_dof.focal)*-translate.z} 1}
  name TransformGeo4
  xpos -591
  ypos 43
 }
push $N69da130
 Constant {
  inputs 0
  color {0.03306 0.364 0.03306 0}
  name Constant6
  xpos -701
  ypos -101
 }
 Card2 {
  image_aspect false
  control_points {3 3 3 6 

1 {-0.5 -0.5 0} 0 {0.1666666865 0 0} 0 {0 0 0} 0 {0 0.1666666865 0} 0 {0 0 0} 0 {0 0 0} 
1 {0 -0.5 0} 0 {0.1666666716 0 0} 0 {-0.1666666716 0 0} 0 {0 0.1666666865 0} 0 {0 0 0} 0 {0.5 0 0} 
1 {0.5 -0.5 0} 0 {0 0 0} 0 {-0.1666666865 0 0} 0 {0 0.1666666865 0} 0 {0 0 0} 0 {1 0 0} 
1 {-0.5 0 0} 0 {0.1666666865 0 0} 0 {0 0 0} 0 {0 0.1666666716 0} 0 {0 -0.1666666716 0} 0 {0 0.5 0} 
1 {0 0 0} 0 {0.1666666716 0 0} 0 {-0.1666666716 0 0} 0 {0 0.1666666716 0} 0 {0 -0.1666666716 0} 0 {0.5 0.5 0} 
1 {0.5 0 0} 0 {0 0 0} 0 {-0.1666666865 0 0} 0 {0 0.1666666716 0} 0 {0 -0.1666666716 0} 0 {1 0.5 0} 
1 {-0.5 0.5 0} 0 {0.1666666865 0 0} 0 {0 0 0} 0 {0 0 0} 0 {0 -0.1666666865 0} 0 {0 1 0} 
1 {0 0.5 0} 0 {0.1666666716 0 0} 0 {-0.1666666716 0 0} 0 {0 0 0} 0 {0 -0.1666666865 0} 0 {0.5 1 0} 
1 {0.5 0.5 0} 0 {0 0 0} 0 {-0.1666666865 0 0} 0 {0 0 0} 0 {0 -0.1666666865 0} 0 {1 1 0} }
  name Card3
  xpos -701
  ypos -5
 }
 TransformGeo {
  inputs 2
  translate {0 0 {-parent.cam_dof.focal_point}}
  scaling {{(parent.cam_dof.haperture/parent.cam_dof.focal)*parent.cam_dof.focal_point} {(parent.cam_dof.vaperture/parent.cam_dof.focal)*parent.cam_dof.focal_point} 1}
  name TransformGeo3
  xpos -701
  ypos 43
 }
 Scene {
  inputs 3
  name Scene2
  xpos -691
  ypos 129
 }
 Output {
  name Output1
  xpos -701
  ypos 375
 }
 Input {
  inputs 0
  name InputCam
  label "\[value number]"
  xpos -260
  ypos -249
 }
 NoOp {
  name VAR
  xpos -260
  ypos -177
  addUserKnob {20 User}
  addUserKnob {7 s l subject_distance R 0 1000}
  s {{parent.cam_dof.focal_point}}
  addUserKnob {7 f l focal_length R 0 250}
  f {{parent.cam_dof.focal}}
  addUserKnob {7 N l f-number R 0 45}
  N {{parent.cam_dof.fstop}}
  addUserKnob {7 c l coc}
  c 0.025
  addUserKnob {7 H l hyperfocal_distance R 0 1000}
  H {{"(pow(f, 2)) / (N*c)/mm"}}
  addUserKnob {7 Dn l dof_near R 0 1000}
  Dn {{"(s*mm * (H*mm-f) / (H*mm + s*mm - f*2))/mm"}}
  addUserKnob {7 Df l dof_far R 0 1000}
  Df {{"s > H ? 100000 : (s*mm * (H*mm-f) / (H*mm - s*mm))/mm"}}
  addUserKnob {7 mm}
  mm {{"parent.depth_unit == 1 ? 10 : parent.depth_unit == 2 ? 100 : parent.depth_unit == 3 ? 1000 : parent.depth_unit == 4 ? 25.4 : parent.depth_unit == 5 ? 304.8 : 1"}}
 }
end_group