EV对照表 app for iPhone and iPad

Photography friends all know that in very weak light conditions, a large aperture to be measured using a baseline value, and then converted into this base to the number of actual shooting aperture and shutter a few, but to live is usually measured after mental arithmetic progression, for non--,
Often experience in photography is a senior course, if the palm, but for beginners is really a bit trivial thing, so this software specially developed for beginners can be very fast conversion can set the aperture and shutter values.

Instructions for use:
A. EV query part:
1 First, use your hands before the camera, transferred to a large aperture, usually F2.8 or F4, with your usual way of metering the number of measured a shutter.
2 in the bottom of the screen select your software measured the aperture and shutter data.
3 and then press the conversion button, which can be needed at all levels of the EV number of aperture and shutter.

B. convert part of flash output:
1. You must know your flash of GN values​​, please see the flashing lights of the specification.
(2) and then flash the software, enter your values ​​and the GN is a subject or person from the flash distance.
3 and then press "calculate" how much can be learned which can contribute to the aperture value.
4 camera software may not be set on the calculated aperture value can be set closer to the aperture.

Please note: currently only supports iOS version 9.1 or above.