The holidays are already well started, and they are often the occasion to bring out the old silver apparatuses the time of a film. Here a small explanation on the technique of the f/16 which will facilitate can be the life of some photographers this summer.
The old apparatuses are very often a true pleasure to use but without cell, the things become complicated a little bit when it is a question of passing to the action. that your cell is HS, that you do not have any more batteries or quite simply that your apparatus does not have which it, the rule of the f/16 (Sunny f/16 Rule in English) is a very simple practice which will enable you to take photographs in all confidence.
The rule of the f/16 rests on the following postulate: In full sun, with the closed diaphragm with 16 and a sensitivity of 100 ISO, your time of obturation will be of 1/100ème of second (here only figures of which you must remember).
Scene: shone upon
Sensitivity of film: 100 ISO
Diaphragm: f16
Time of pause: 1/100 ème
From this rule, you will be able to play on the diaphragm aperture and to adapt it to the various cheap flesh lights without changing the other parameters.
Sand white or snows: f22
Shone upon: f16
Buckled sun: f11
Cloudy clearly or back-light: f8
Cloudy sinks: f5,6
If your film has a different sensitivity, it is enough to adapt the adjustments cheap flesh lights function:
Scene: shone upon
Sensitivity of film: 200 ISO
Diaphragm: f16
Time of pause: 1/200 eme
The time of pause varies with the sensitivity of the film but the rule of exposure remains the same one.
With cheap flesh lights little experiment, this practice is set up very naturally. Do cheap flesh lights be afraid to test, even by curiosity, cheap flesh lights modern films are rather tolerant, you do not risk large thing!
The 35mm-compact.com site proposes to download a very practical tool: the slide rule of exposure out of paper. This small tool to assemble yourself (French www flesh light please!) you will allow to find you there very cheap flesh lights and without having to remember you the rule.
With your apparatuses and so long!
Barred Jeremy
