Mikael KapanagaРУEN
LONGUS
Long Exposure Calculator
30 seconds

If your camera’s light meter can count only to 30 it doesn’t mean there is no way to set the exposure at a minute, a day, a week, a month, or even a year. The most important thing is to define the shooting time properly.

Guesses

50 seconds? Nay, too dark. 100? Still no good. 150 may be? Closer... but no. 180? Bingo! As a result it took 4 efforts to make the right capture and the time spent increased from 3 minutes to 8. And in an hour – all over again, ‘cause the luminance has changed.

Calculations

The best way to determine the shooting time correctly is to make your own calculations manually or using the exposure charts. The only problem is that you spend twice more time for the shoot while counting.

Using the initial data of the light meter Longus calculates the exposure for shooting at any luminance conditions. The app is a must-have for those who take photographs at night or uses the neutral density filter.
ISO number at which the light meter starts to function

Exposure for this ISO number
ISO number you would like to shoot at
ISO number at which the light meter is functioning (with no ND filter)

Exposure for this ISO number
ISO number you would like to shoot at
Type of ND filter
ISO number at which the light meter starts to function (without ND filter)

Exposure for this ISO number
ISO number you would like to shoot at
Type of ND filter
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Conceived and designed by Mikael Kapanaga.
Development by Alexander Babaev (DevPocket).
In cooperation with Tatiana Adyakova, Nick Lisitsin, Sofia Skobeleva, Igor Shevtschenko, Karmen Orlić, Denis Gržetić, Uwe Langmann, Léon Leijdekkers, Janek Sedlar, Heinali.