fr:userguide
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fr:userguide [2012/08/29 15:41] – [Bulb/Focus Ramping] oxypi | fr:userguide [2012/08/29 22:24] – [Bulb Timer] oxypi | ||
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{{ vimeo> | {{ vimeo> | ||
- | Bulb Ramping permet d' | + | Le Bulb Ramping permet d' |
Options: | Options: | ||
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Notes techniques : | Notes techniques : | ||
- | * Exposure is metered using a condition | + | * L' |
- | * Exposure for every shot is computed from previous shots, using a feedback | + | * L' |
- | * ISO is chosen using the 180 degree rule, so the resulting shutter speed stays between 90 and 270 degrees | + | * La sensibilité |
- | * Only full-stop | + | * Seuls les ISOs exacts |
- | * Shutter speed can be adjusted with a resolution of 10ms. | + | * La vitesse de déclenchement peut être ajustée avec une résolution de 10 ms. |
- | * Frames with fast shutter speeds | + | * Les images avec une vitesse de déclenchement élevée |
- | * It can go from 1/8000s @ ISO 100 (daylight) to several | + | * Cela peut aller de 1/8000 s à ISO 100 (lumière du jour) jusqu' |
- | * Exposure | + | * algorithm is a feedback controller designed with pole placement - the closed loop response will have two real poles placed at the smoothing factor value. Smoothing factor is computed in such a way that, when scene ramping speed matches the speed selected in menu, ramp is followed at exactly 1 EV behind it. |
- | * If the lighting changes suddenly a few stops between two shots (for example, you change the ND filters or the aperture), the algorithm should recover completely after 2 or 3 shots. A sudden exposure change is considered when the exposure difference is greater than 2 stops. | + | * Si la lumière change soudainement de plusieurs |
- | Logging: | + | Enregistrement .log : |
- | * When you use bulb ramping, Magic Lantern | + | * Lorsque vous utilisez le bulb ramping, Magic Lantern |
- | * These log files can be used to see how well the ramping went and to fine-tune the algorithm. | + | * Ces fichiers |
==== Bulb Timer ==== | ==== Bulb Timer ==== | ||
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[[http:// | [[http:// | ||
- | Very long exposures with Bulb mode and ML timer. | + | Expostitions très longues en mode Bulb et avec timer ML. Cet outil est utile pour les prises nocturnes et pour l' |
- | Bulb timer is started by holdin the shutter pressed halfway for one second, or by remote triggers / intervalometer. | + | Le timer Bulb est activé en gardant le déclencheur à mi-course pendant une seconde, ou avec une télécommande. |
- | + | ||
- | Tip: you can cancel the exposure earlier by half-pressing the shutter button. | + | |
+ | Astuce : vous pouvez arreter avant la fin en appuyant à mi-course sur le déclencheur. | ||
==== LCDsensor Remote ==== | ==== LCDsensor Remote ==== | ||
fr/userguide.txt · Last modified: 2012/08/31 01:22 by oxypi