RapidExposure

This app will turn iPhone into exposure meter for cameras.
It can continuously measure exposure value and indicate the information without releasing the shutter.
It allows you to recalculate and indicate the shutter speed together with other ISO values and F values even during the measurement.

The measurement is interrupted by the save button, and then write a row exposure value which iPhone automatically set into the image that iPhone had been taking,
The image with the row exposure value is saved as a sample and displayed.　It also displays the exposure value that the user has set.

You can see the saved images on a list of images in the history window.

You can adjust and rock the exposure on the tapped point of the preview screen.
The exposure rock can be cancelled by the 'Auto' button.

The shutter sound can be reduced by the volume button. However, it becomes the normal volume if it is set mute.

At first the app puts high priority on ISO and F in exposure calculation.
Under the exposure measurement, it indicates variable aperture stops (F-number) at a fixed shutter speed when you manually change the shutter speeds.
Or, when you manually change the aperture stops (F-numbers), it indicates variable shutter speeds at a fixed aperture stop.
If you change the ISO value, shutter speed or F-value changes depending on the mode at the time.

The range of ISO vales, F values and shutter speeds are as follows. (In the new version, detail display mode is added in which F,ISO,SS values are changed by 1/3 step)

ISO vales:
"25","50","100","200","400","800","1600","3200","6400","12800","25600","51200"

F values:
"F0.7", "F1", "F1.4", "F2", "F2.8","F4", "F5.6", "F8", "F11", "F16","F22", "F32"

shutter speeds:
"60","30","15","8","4","2","1","1/2","1/4","1/8","1/15","1/30","1/60","1/125","1/250","1/500","1/1000","1/2000","1/4000","1/8000"


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How to use:
(1) Immediately after start-up, this application starts the exposure calculation automatically and it displays the values of ISO, F and SS in the wheel.
(2) Exposure is recalculated in accordance with the subject that is reflected in the camera, the value of the SS will change accordingly. When you point the camera toward bright, the value of SS is reduced. Turning the camera to darker, the value of the SS will increase.
(3) If you change the value of the ISO in the wheel, the value of the SS will change