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Shutter Speed Tester with Raspberry Pi
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Shutter Speed Tester with Raspberry Pi

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Create a shutter speed test

Create a shutter speed test

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  • 1. Shutter Speed Testerwith RasPi2013-May-24Japanese Raspberry Pi Users Group池田 百合子IKEDA YurikoSponsored by
  • 2. 自己紹介Self Introduction池田 百合子 (IKEDA Yuriko)WordPress Plugin dev.‣ Ktai Style‣ Ktai Entry写真好き (Love photograph)http://www.yuriko.net/@lilyfanjp
  • 3. 生田緑地ばら苑Ikuta Rose Garden
  • 4. 川崎工場夜景Factories in Kawasaki at Night
  • 5. 金環日食Annular Eclipse
  • 6. ダイヤモンド富士Mt. Fuji with Diamond
  • 7. フィルムは死なずFilm is forever.
  • 8. フィルムカメラの現状Status of Film Cameras
  • 9. 新品カメラがないNew products are fewCanon EOS-1v From Mar 2000Nikon F6 From Oct 2004FujiFilm GF670W From Mar 2011Lomography Belair X 6-12 From Nov 2012
  • 10. 中古カメラの問題Problem of second hands整備が必要 (Need to maintenance)モルトプレーンが弱っている(Moltoprene is weak)露出が不正確 (Exposure is wrong)露出計が壊れている (Meter is broken)シャッター速度が不正確(Shutter speed has gap)
  • 11. そこでNowシャッター速度を測定しよう。(Measure the shutter speed.)
  • 12. シャッターについてAbout camera shutter
  • 13. レンズシャッターLens shutterレンズの絞り位置にシャッター(Shutter at aperture)レンズ一体型カメラに多い(For point & shoot)開放絞りに近づくと速度が出ない(Slows at largeaperture.)
  • 14. フォーカルプレーンFocal Plane shutter (FP)レンズの焦点位置にシャッター(Shutter at focal point)レンズ交換式カメラに多い(For interchangeable-lens camera)速い被写体は像が歪む(Fast target warpsimage.)
  • 15. FPシャッターの動作Move of FP shutter2枚の幕が時間差で動作(Two curtains run in time-lag.)時間差がシャッター速度(The lag is shutter speed.)高速シャッター: 先幕を後幕が追い掛ける形(At high-speed, the rearcurtain chases the frontcurtain.)
  • 16. JIS B 7092:1992Japan Industry Standardシャッター速度の測定方法(Testing of shutter speed)ISO 516 に対応(Refers ISO 516)センサ位置(Sensor Location)画面中央と (Center and)縦走り(vertical travel): 10.5mm横走り(horizontal travel): 16mm16mm10.5mm
  • 17. めんどくさいToo complex
  • 18. 縦横共用Both vertical & horizontal隅と中央にセンサ(Sensor at corner andcenter of film window.)シャッター速度:各地点の明るい時間(Shutter speed:length of bright time.)幕速度: ポイント間の時間(Curtain speed:time between points)
  • 19. 模式図Diagramlampdiffuserlensshuttersensorsshade diffuserRasPi
  • 20. 裏蓋が開くことNeed to open back doorデジタルカメラ不可(Not applicable for digital camera)メーカーなら可能……(Camera maker can do this way.)フィルムカメラ万歳 !!(Film camera is marvelous!!)
  • 21. まだ構想段階Still in plan
  • 22. 乞うご期待Don t miss it.