Lensage is the photography calculator built for landscape and astrophotographers who plan. Every shot needs the right tool. Lensage gives you 15+ professional calculators, 33 ready-made exposure recipes, and a 33-term glossary — all working offline on your iPhone, iPad, and Apple Watch. THE CALCULATORS YOU ACTUALLY USE • Depth of Field — near, far, total, hyperfocal, with a visual depth ruler • Hyperfocal Distance — the single most useful number for landscape work • Field of View — match focal length to scene • NPF Rule — pixel-sharp stars, sensor and lens accounted for • 500 Rule — quick star-trail estimate • Moon Phase — illumination, rise & set, for any night • Golden & Blue Hour — civil, nautical, and astronomical twilight • Sun Altitude — direction and elevation at any moment • Milky Way Visibility — galactic core altitude for your spot • Exposure & Reciprocity — long-exposure compensation • ND Filter — stops, seconds, full chart • Sunny 16 — the rule, computed • Crop Factor — full-frame equivalents instantly • Diffraction — smallest sharp aperture • Print Resolution — pixels to inches at any DPI EXPOSURE RECIPES (33 scenes) Milky Way Core, Aurora, Fireworks, Lightning, Star Trails, Moonrise, Waterfall, City at Night, Snowscape, Storm Chase, Glacier & Ice, Foggy Morning, Sunset Silhouette, Beach Midday, Autumn Foliage, Drone Aerial, Urban Abstract, Golden Portrait, Chapel Wedding, Concert, Pet Indoor, Indoor Basketball, Panning, Wildlife, Macro, Light Painting, Puddle Reflection, Multi-Exposure, Gigapixel Panorama, Infrared, Backlit Smoke, Product Flatlay, Food by Window. Each recipe gives you ISO, aperture, shutter — plus 4 field-tested tips written by someone who has actually shot the scene. GLOSSARY — 33 terms in plain language Depth of Field, Circle of Confusion, Hyperfocal, Crop Factor, Bortle Scale, NPF & 500 Rules, Bayer Pattern, Reciprocity, Diffraction, Bokeh, and 23 more — explained without the noise. APPLE WATCH COMPANION Your most-used calculator, on your wrist. Quick DOF and hyperfocal lookups without unlocking your phone. HOME-SCREEN WIDGET Tonight's moon phase, twilight times, and Milky Way visibility on your lock screen. BUILT FOR SERIOUS USE • 100% offline — no servers, no tracking, no ads • 9 languages, fully localized • No account, no login — your settings stay on your device • Apple Watch + Widget + iPad + iPhone PRIVACY: ZERO DATA COLLECTION Lensage does not collect any data. Not email, not name, not analytics. Period. We don't even have servers. Read our privacy policy — it's the shortest one you've ever seen. PRO UNLOCK (one-time) Most of Lensage is free. Upgrade to Pro once to unlock: • PDF export of any calculator result • Full cheat-sheet library in reference mode • Apple Watch full-featured app • Every future Pro feature included forever — never a subscription Plan the shot before you arrive. Light, focus, moon, stars — Lensage gets you there.
