Filter Simulation vs Roshutsucho

Simulate real optical filters in black & white. This app uses custom CIColorKernel shaders to modulate grayscale luminance based on color vector similarity—accurately mimicking red, yellow, green, blue, and orange filters as used in film photography. Then, if needed, save the filtered image with filter information. Then, swipe left and find an automatic shutter speed calculator for applying various ND filters And that's not all; keep on swiping and you can simulate pinhole photographs before shooting!

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