Roshutsucho: Exposure & ND

How long with an ND filter? How much extra exposure does your film need? Roshutsucho brings exposure calculations and a timer together for film and digital photography. FREE TO USE • ND filter calculator: calculate exposure times for ND2 through ND1000 • Exposure timer: start from a calculated result, pause and resume, and enable a completion alert • Sunny 16: find aperture and shutter speed combinations for ISO and light conditions • EV/LV converter: explore the relationship between exposure values and camera settings • Restore your previous settings for the next shoot PRO — ONE-TIME PURCHASE • Integrated calculator: start with a metered exposure or Sunny 16, apply ND compensation, then film reciprocity correction. See each step and the final time • Named presets: save and recall multiple shooting setups • Reciprocity correction: estimate longer exposures for the included film stocks • Push/pull calculations, bellows extension correction and flash guide number calculations Pro is a one-time purchase, not a subscription. The purchase screen shows the current local price. Purchase restoration is supported. MADE FOR THE FIELD A dark interface with English and Japanese support. Calculations, presets and the timer work offline; purchases and restoration require a connection. No ads or account registration. Optional usage sharing is off by default. Roshutsucho is a calculation tool. It does not measure light with your camera or remotely operate the shutter. Film correction is an estimate: consult film documentation and account for your shooting conditions. The timer supports 1 second to 24 hours. Completion alerts require notification permission; sound may be affected by silent mode, Focus or other device settings. Support: support@vjconnect-software.com