Light Meter Ultra vs ZoneCalc

Fast, precise and easy to use. Get perfect exposures every time. No additional hardware required. Say goodbye to arcane Sunny 16. Figuring out the best exposure settings for your manual camera doesn’t have to be difficult. Light Meter Ultra for iPhone gives you the exact readings you need for your camera by simply pointing your device at the scene. Precise measurements mean you can dial in the perfect exposure settings for capturing the widest dynamic range, whilst customizable shooting profiles allow you to switch between settings with a single tap. Download now and take advantage of our free plan which includes our precision Aperture Priority metering mode, limited settings, and single-use shooting profiles. Or choose one of our PRO plans and gain access to everything the app has to offer, including our full suite of professional metering modes, quick-select reusable shooting profiles, plus advanced features such as reciprocity failure correction that you won't find elsewhere. Capture your creative vision with powerful features, including: - Aperture Priority Metering Mode - Shutter Priority Metering Mode* - Exposure Priority Metering Mode* - Stop increment selection of full, half or third stops* - Customizable ISO, Shutter Speed and Aperture ranges* - Exposure Compensation - Exposure Lock - Sample Offset - Custom Camera Profiles* - Detachable Lens Profiles* - Film/Emulsion Profiles* - Bulb-mode* - Reciprocity Failure Correction* *Features marked with an asterisk require an active PRO plan Download now and start metering on your iPhone today. Terms of Use: https://lightmeterultra.com/terms Privacy Policy: https://lightmeterultra.com/privacy

ZONECALC · ZONE SYSTEM CALCULATOR ZoneCalc is a precision tool for large format, medium format and 35 mm photography following Ansel Adams' Zone System. Built for photographers who work with a spot meter, develop their own negatives, and want full control over exposure and tonal placement. METERING In Classic mode, enter the shutter speed for the deepest shadow with detail (Zone II) and the brightest highlight with detail (Zone VIII). ZoneCalc returns the shutter speed for Zone V, 18 % middle gray: the exposure you set on the camera. Multi mode accepts any number of measurement points across the scene. The app auto-assigns each point to a zone; drag pins on the zone strip to express your placement intent. For pinhole cameras, you can enter your own apertures beyond f/32. NEW: METERING WITH THE IPHONE CAMERA Capture the scene with the iPhone and tap up to five measuring points into the image. The reading is taken from the camera's RAW image, not from the displayed photo. ZoneCalc pre-assigns the darkest area to Zone II and the brightest to Zone VIII; every zone can be changed. One tap transfers the reading to the calculator: two points go to Classic, more points go to Multi. Zone spacing and dynamic range are reliable right away. For the absolute value, calibrate the iPhone once with a grey card against your spot meter. Camera readings are saved to the history with image and measuring points. Camera metering requires an iPhone that captures RAW. RECIPROCITY For exposures above one second, the Schwarzschild effect is corrected automatically: t_corr = t_nom ^ p, using the film-specific exponent. The corrected camera time appears directly in the result card. The shutter speed list extends to 30 minutes. Films with reciprocity data: Ilford HP5+, FP4+, Delta 100/400, Pan F+ 50, Ortho+ 80, Kodak Tri-X, T-Max 100/400, Kodak Portra 160/400/800, Fujifilm Acros 100 II, Fomapan 100/200/400, Leica Monopan. N-RATING & DEVELOPMENT ZoneCalc compares the scene's dynamic range against the film's usable latitude and proposes a development adjustment, from N−2 to N+2. For each film, concrete times are shown for common developers: D-76, Rodinal, HC-110, XTOL, ID-11 and T-Max Dev, with dilutions per Massive Dev Chart and manufacturer recommendations. Add your own tested times per film and developer. HISTORY & EXPORT Every calculation can be saved with a note and the chosen developer; two entries can be compared side by side. The complete result with shutter speed, reciprocity, N-rating and development times exports as an image for the darkroom or for sharing via AirDrop, message or mail. DESIGN The interface follows the visual language of classic Leica instruments: monospaced typography, warm amber accent, hard edges instead of rounded corners. Fully localized in English and German, all-dark throughout, optimized for darkroom and field use. ZONECALC PRO Classic two-point metering with Zone V calculation and the zone strip are free. The one-time Pro upgrade unlocks: • Metering with the iPhone camera and grey card calibration • Multi-point metering with interactive zone assignment • Reciprocity correction and N-rating • Development recommendations with times per developer, plus your own development times • Save, compare and image export One app, no subscriptions, no data collection. All calculations run locally on device, including camera metering. ZoneCalc uploads nothing.