Photography Tools

Calculate precise Ferric Ammonium Citrate and Potassium Ferricyanide ratios for cyanotype printing based on paper size and absorbency.

User Intent: "Cyanotype ratio calculator"

Determine optimal pinhole diameter for specific focal length to maximize sharpness using 1890s optics journals.

User Intent: "Pinhole camera calculator"

Calculate projected image size and required lens focal length for designing immersive Camera Obscura rooms.

User Intent: "How to build a camera obscura room?"

Calculate exact shadow lengths for photography and art based on sun altitude. Derived from 17th-century sciographic rules.

User Intent: "Shadow length calculator for landscape photography"

Calculate manual camera exposure settings using the classic Sunny 16 rule. Perfect for film photographers without light meters.

User Intent: "How do I expose film without a light meter?"

Calculate the maximum shutter speed for sharp star photography using the 500 Rule. Prevent star trails in your night sky images.

User Intent: "How long can I expose for star photography?"

Calculate long exposure times for photography when using Neutral Density (ND) filters. Convert base shutter speeds into final exposure times.

User Intent: "ND filter exposure calculator"

Calculate the 35mm equivalent focal length for any lens and sensor combination. Compare Full Frame, APS-C, and Micro Four Thirds FOV.

User Intent: "Focal length crop factor calculator"

Find exact golden hour and blue hour times for photography at any location and date. Uses NOAA solar equations for accurate twilight windows.

User Intent: "What time is golden hour for photography?"

Calculate the exact scanning resolution needed to enlarge or reproduce photos and documents at any target print size.

User Intent: "What DPI should I scan photos at?"

Calculate the exact shooting interval for smooth timelapse video. Enter event duration and clip length — get interval, frame count, and storage estimate.

User Intent: "How do I calculate timelapse interval?"