Class: PhotoUtils::Tools::FilmTest

Inherits:
PhotoUtils::Tool show all
Defined in:
lib/photo_utils/tools/film_test.rb

Instance Method Summary collapse

Methods inherited from PhotoUtils::Tool

#description, #initialize, #name, #usage

Constructor Details

This class inherits a constructor from PhotoUtils::Tool

Instance Method Details

#run ⇒ Object 



9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
 
# File 'lib/photo_utils/tools/film_test.rb', line 9

def run
  camera = Camera['Hasselblad']

  scene = Scene.new
  scene.camera = camera
  scene.sensitivity = 100
  scene.camera.shutter = 1.0/60
  scene.camera.lens.aperture = 5.6
  # scene.description = "film: Acros 100; flash: Metz 60 at 1/128~1/256 power; dev: 11m in HC-110 (H) @ 68"

  scene.print_exposure

  zone_offset_from_mg = -4

  # recommendation from Adams' "The Negative"
  # steps = [0, -1.0/3, -2.0/3, -1, 1.0/3, 2.0/3, 1]
  steps = [-2, -1.5, -1, -0.5, 0, 0.5, 1, 1.5, 2]

  scenes = []

  base_fog = Scene.new
  base_fog.description = "base + fog"
  scenes << base_fog

  steps.each do |i|
    scene2 = scene.dup
    scene2.brightness = PhotoUtils::Brightness.new_from_v(scene.brightness.to_v - zone_offset_from_mg)
    scene2.sensitivity = Sensitivity.new_from_v(scene.sensitivity.to_v + i)
    # FIXME: scene2.calculate_best_exposure
    scene2.description = i.to_s
    scenes << scene2
  end

  scenes.each_with_index do |scene2, i|
    puts "%2d | %5s | %10s | %10s | %12s | %12s" % [
      i + 1,
      scene2.description,
      scene2.sensitivity,
      scene2.exposure.aperture,
      scene2.exposure.time,
    ]
  end
end