Grainium vs Light Meter LuMe

Grainium is the analog ecosystem — six precision tools, a community of working film photographers, an AI built for film, and a worldwide directory of labs and camera shops, all in one app. CAPTURE & MEASURE - Light Meter — incident and reflective metering with film-specific reciprocity correction - Colour Temp — Kelvin readings calibrated for daylight and tungsten stocks - Zone Reference — Train your eye to estimate subject distance for sharper zone focusing DEVELOP & PROCESS - Dev Timer — push/pull-aware multi-bath timers with haptic step alerts - Safe Light — true-red darkroom mode, coin-test calibrated - Negative View — instant in-camera positive preview for inversion DISCOVER & SHARE - A worldwide directory of film labs, repair shops, and analogue camera stores — find what's near you, find what's worth a flight - A community gallery to publish your work, follow photographers who inspire you, and find your next favourite film - Photo walks, meet-ups, gallery openings, expos — find local events or host your own - A blog of field notes, gear reviews, and darkroom guides from the community GRAINIUM ASSIST — AI BUILT FOR FILM Ask anything: identify a roll from a half-remembered design, plan an exposure for an unfamiliar stock, get a starting recipe for a push to 3200. Grainium Assist is trained on the language of film photographers, not generic photo metadata. WHY FILM PHOTOGRAPHERS LOVE GRAINIUM Six precision tools that fit in your pocket. A community that actually shoots film. AI that knows film and development. And a directory of every lab worth knowing. GRAINIUM PRO Unlock the full toolkit, AI Assist, event creation, and an ad-free experience. - Subscriptions auto-renew unless cancelled at least 24 hours before the end of the current period. - Manage or cancel any time from Settings → Apple ID → Subscriptions. PRIVACY & TERMS We don't sell your data. We don't track you across other apps. Our privacy policy and terms are at https://grainium.tech/privacy and https://grainium.tech/terms. SUPPORT https://www.grainium.tech/support Built for photographers, by photographers.

LuMe is a pro-grade light meter and exposure calculator built for film photographers. Whether you're shooting medium format on a Mamiya, large format on a 4×5, or 35mm on a Leica, LuMe gives you the exposure intelligence your film camera doesn't have. METERING MODES FOR EVERY SITUATION • Matrix — averages the whole scene for balanced exposures • Center-weighted — emphasizes the middle, like a classic SLR meter • Spot — measures a small area you tap, just like a 1° spot meter • Zone System — Ansel Adams' tonal mapping (Zones I–IX) right in your viewfinder MULTI-POINT SPOT METERING Place up to four spot markers anywhere on your scene. Read each EV at a glance, evaluate contrast range, and place tones with intention. LIDAR SPOT DISTANCE (on Pro devices) See the physical distance to any metered spot — useful for hyperfocal setup and verifying focus on rangefinders and manual-focus lenses. RECIPROCITY CORRECTION FOR EVERY FILM STOCK Long exposures don't behave linearly on film. LuMe applies the Schwarzschild exponent for your stock — Tri-X, TMax, Portra, Ektar, Velvia, and more — so you don't need printed tables in your bag. DEPTH OF FIELD CALCULATOR Hyperfocal distance, near limit, far limit — for 35mm, APS-C, medium format (6×4.5, 6×6, 6×7), and large format (4×5). One tap. FLASH GUIDE NUMBER CALCULATOR GN, distance, power fraction → f-stop. Solved. LIVE EXPOSURE TOOLS • Histogram overlay • Highlight/shadow clipping warnings • ND filter compensation • Aperture priority & shutter priority • Exposure compensation dial • ISO and shutter range constraints (cap at your film speed) BUILT FOR THE WAY FILM PHOTOGRAPHERS ACTUALLY SHOOT • Spot meter a high-contrast scene; place highlights on Zone VII • Apply reciprocity for a 30-second exposure on Tri-X • Calculate hyperfocal for landscape work on Portra 400 • Verify a flash setup before burning a frame LuMe replaces your handheld meter, reciprocity card, DoF chart, and flash calculator with one tool that fits in your camera bag. Available in 16 languages: English, German, French, Spanish, Italian, Portuguese, Dutch, Swedish, Polish, Turkish, Russian, Arabic, Japanese, Korean, Chinese (Simplified & Traditional). LUME PRO • $6.99 USD for lifetime access Privacy policy: https://lume.contraststudio.app/privacy.html Terms of Use: https://lume.contraststudio.app/terms.html