James Owl Calc vs TimerGlass

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.

TimerGlass is the field companion for film photographers — reciprocity, pinhole geometry, exposure estimation, and a beautiful timer, all in one quietly designed app. WHAT IT DOES • Reciprocity failure correction for 100+ film stocks (Ilford, Kodak, Fuji, Foma, Rollei, ADOX, CineStill, Lomography and more) — built from manufacturer data sheets. • ND filter stack and bellows extension compensation are folded into the same calculation. • Pinhole camera tool — Lord Rayleigh's optimal aperture, effective f-number, equivalent angle of view by film format, and Sunny-16 exposure estimation that flows straight into the timer. • Long-exposure timer with Live Activity and Dynamic Island, accurate even when your phone is locked. • Long-exposure side-effects advice — pull-development guidance for B&W, color-shift tips for negative and slide film, contextual to your actual exposure time. • History of recent exposures with all the parameters you used. • Custom film stocks — define your own with power-law or lookup-table reciprocity curves. DESIGNED FOR Large-format and pinhole photographers who do long exposures often, 35mm and medium-format shooters chasing dusk and night scenes, and anyone tired of squinting at a film data sheet by torchlight. LANGUAGES English, 简体中文, 繁體中文, 日本語, Deutsch, Français. PRIVACY TimerGlass collects nothing. Everything you do stays on your device.