Roshutsucho: Exposure & ND

Film correction & bulb timer

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Calculate your ND exposure and start a timer. With Pro, combine metered or Sunny 16 exposure with ND and film correction, then save your setup as a preset. 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

Ratings & Reviews

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• Added an exposure timer with pause, resume and completion alerts • Added the Pro integrated calculator and named presets • Restore your previous settings • Improved ND layout, purchases and restoration • Review requests appear at a natural break after continued use

Version 1.1

The developer, Hiroyuki Yamamoto, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Purchases
    • Location
    • Identifiers
    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
Hiroyuki Yamamoto
Size
45.6 MB
Category
Photo & Video
Compatibility
Requires iOS 15.0 or later.
  • iPhone
    Requires iOS 15.0 or later.
  • iPad
    Requires iPadOS 15.0 or later.
  • iPod touch
    Requires iOS 15.0 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English
Age Rating
4+
In-App Purchases
Yes
Copyright
© 2026 VJ-CONNECT
  • Developer Website
  • Privacy Policy

    • More by Hiroyuki Yamamoto

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