James Owl Calc

James' Long Exposure Calculator is the ultimate companion for landscape photographers seeking to master the art of long exposure photography. Designed by professional photographer James Yu, this powerful tool eliminates guesswork and transforms your creative vision into precise camera settings.
Whether you're capturing silky smooth waterfalls, dreamy misty seascapes, or ethereal cloud streaks, this app delivers professional-grade calculations tailored to your specific equipment. Simply input your current settings and desired effect, and the advanced algorithm will recommend the perfect ND filter combination, aperture, and ISO values to achieve stunning results every time.
Key features include:

Precise exposure calculations for any ND filter strength
Reverse calculation mode - start with your desired exposure time
Smart adaptive technology that accounts for changing light conditions
Built-in countdown timer with audio alerts
Camera-specific settings for maximum accuracy
Detailed tutorials for various long exposure techniques
Clean, intuitive interface designed for field use

The app supports all major camera brands and ND filter types, from ND8 to ND64000. Take your long exposure photography to the next level with James' professional insights and techniques refined through years of experience.
Whether you're a beginner exploring long exposure or a seasoned professional seeking efficiency, James' Long Exposure Calculator provides the precision and guidance you need to create breathtaking images that stand out from the crowd.