illumeter app for iPhone and iPad

- Lets begin by selecting the exposure measurement mode!
illumeter provides aperture, shutter speed, and ISO mode!
Aperture mode calculates the appropriate aperture value based on shutter speed and ISO settings.
Shutter speed mode calculates the appropriate shutter speed based on aperture and ISO settings
ISO mode calculates the appropriate ISO value based on aperture and shutter speed settings.
The resulting value is then displayed in the center of the screen.

- Then, adjust the settings values by manipulating the rings!
You can easily adjust aperture, shutter speed, and ISO settings by sliding the corresponding rings.
The value corresponding to the selected mode will be updated in real-time according to the adjusted values.

- You can also adjust the focal length!
You can adjust the focal length by manipulating the green focal length ring.
Try adjusting it to a focal length similar to your cameras, ranging from 28mm to 200mm.

- Need to lock in exposure settings?
Simply tap on the point where you want to lock the exposure and focus.
While the exposure is locked at that point, the value is calculated based on the fixed exposure.
You can release the exposure lock anytime by tapping the Unlock button.
You can release the exposure lock anytime by tapping the Unlock button.

- Log and Revisit Your Exposures!
Capture the angle, frame, and exposure by simply tapping the shutter button.
You can revisit your logged exposures through a list or map.