« Photographie/Filtres optiques/Filtres gris neutre » : différence entre les versions

l'abréviation de "seconde" est s et non sec
(l'abréviation de "seconde" est s et non sec)
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Les meilleurs résultats sont obtenus avec des filtres de forte densité, ND400 ou ND1000, avec lesquels on atteint sans problème les temps de pose de plusieurs secondessondes ou de plusieurs minutes nécessaires pour réussir ce genre de prise de vues. Faut-il préciser que l'usage d'un [[trépied]] très rigide s'impose, sauf bien sûr si l'appareil peut ou doit être parfaitement immobilisé d'une autre manière, comme c'est le cas pour la photographie prise depuis la voiture.
 
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