dexton's crossword puzzle

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Across
  1. 3. a device for taking pictures
  2. 6. also known as f-stop
  3. 7. the level of sensitivity that the camera has to light
Down
  1. 1. a person who uses the device for taking pictures
  2. 2. a style of photo
  3. 4. rule of...
  4. 5. a part of the device for taking pictures