Lumen Forge 2.0 — eight new pro tools join the light meter, still 100% offline. • Lighting Ratio: stops or apertures to a key:fill ratio, ASC ratio, and contrast band. • Inverse Square: a falloff curve, remaining-light percentage, and the aperture compensation to hold exposure. • Bellows Factor for macro: extension or magnification to a corrected f-number and shutter. • Gel Balance: Kelvin to mired with the closest CTO/CTB gel recommendation. • Dynamic Range (SBR): add spot readings for a stops measurement, a zone-placement strip, and a grad-ND / bracket plan. • Flash Balance, Grey-Card Compensation, and an EV↔lux reference chart. All APEX and optics math is computed on-device and oracle-verified. No account, no network — everything stays on your device.

Lumen Forge - What's New Version 1.1 B&W Filter Factor Calculator - 17 Wratten filters (yellows K2/6/9/12/15, oranges 21/22, reds 25-A/29-F/70, greens 11/13/58, blue 47, 80A conversion, UV/1A, CPL) with accurate daylight and tungsten factors sourced from Kodak B-3, the Ilford B&W Guide, and Ansel Adams' published tables. Stack up to 3 filters, interpolate factor at any Kelvin from 3200 to 5500, and pull the live meter reading for instant shutter correction. Available in Pro Hub. Depth-of-Field Table - The Hyperfocal calculator now shows a full DoF table across every standard full-stop aperture: near limit, far limit, and total depth of field for the current focal length and subject distance. Tap any row to jump to that aperture. Recipe Compare - Select any two saved lighting setups and compare them side-by-side: EV difference, aperture and shutter stop delta, ISO ratio, Kelvin difference, and lux difference - all at a glance. --- Version 1.0 (launch features - already shipped) Film Reciprocity Calculator - 25 classic film stocks (Ilford, Kodak, Fuji, Foma, Rollei, ADOX). Enter your metered time; Lumen Forge applies the Schwarzschild formula to deliver the corrected exposure plus a per-film quick-reference table. Exposure Bracketing - Plan AEB sequences before you set up. Choose 3/5/7/9 frames and step size (⅓ to 2 stops). The full bracket sequence appears with each shutter speed clearly listed. Recipe CSV Export - Tap the share icon in Lighting Recipes to export all saved setups as a comma-separated file. Works with Numbers, Excel, and any spreadsheet app. Pro Hub with eight calculators at launch: Hyperfocal, Cinema 180 shutter, Sunny f/16, Macro reciprocity, Polarizer, Star Trail (NPF rule), Film Reciprocity, and Bracketing.

Lumen Forge 1.2 adds a Film Reciprocity calculator for 25 classic stocks (Ilford, Kodak, Fuji, Foma, Rollei, ADOX) using the Schwarzschild formula, an exposure Bracketing planner (3/5/7/9 frames, ⅓–2 stop steps), and CSV export of your lighting recipes. Fully offline — no account, no ads, no tracking.

Updated the app icon with a more premium detailed design and refreshed the App Store build.