Silverlog Flash vs Photography Tools

Silverlog Flash calculates flash exposure using guide numbers — the fundamental relationship between flash power, distance and aperture. HOW IT WORKS Choose what to solve for and enter the other two values. Find the aperture for a given flash-to-subject distance, the maximum distance for a given aperture, or the guide number from a known distance and aperture. Adjust ISO to see how sensitivity affects your working range. FEATURES • Guide number to aperture calculation • Guide number to maximum distance calculation • Guide number from distance and aperture • ISO adjustment • Metric and imperial distance units • Works offline — no internet connection needed • Clean, focused interface • Dark mode support USEFUL FOR • Manual flash photography without TTL • Working out flash-to-subject distance for off-camera flash • Understanding your flash's effective range at different apertures • Film photographers using manual flash units Part of the Silverlog photography toolkit. No account required. No data collected.

Aperture is the precision photography toolkit designed for serious photographers who want accurate calculations in the field. Whether you're shooting long exposures at dusk, planning a milky way session, asking an AI photography question, or calculating the perfect depth of field for a portrait - Aperture has every tool you need in one place. CALCULATORS ND Filter Calculator Calculate the correct shutter speed when adding ND filters. Enter your base exposure and filter strength, get the perfect long exposure shutter speed instantly. Depth of Field (DOF) Calculator Find your exact near and far focus limits. Enter aperture, focal length, and subject distance to see your full depth of field in metric or imperial units. Hyperfocal Distance Maximize sharpness across the entire frame. Calculate the hyperfocal distance for any lens and aperture combination to get everything in focus from foreground to infinity. Equivalent Exposure Match exposure across different settings. Change ISO, aperture, or shutter speed while keeping the same exposure - perfect for bracketing or switching from tripod to handheld. Sunny 16 Rule A quick reference guide for outdoor exposure without a meter. Organized by light condition from full sun to deep shade. PLANNING Sun and Moon Data See precise golden hour, blue hour, nautical dawn, astronomical dawn, sunrise, and sunset times for any date and location. Moon phase, illumination, moonrise, and moonset included. Golden Hour Countdown Live countdown to the next golden hour or blue hour from your current location. Never miss the light again. Milky Way Planner Find the best night window and direction to photograph the galactic core. See moon illumination, peak altitude, azimuth bearing, and the three best months of the year for your location. REFERENCE Scene Settings Guide Starting camera settings for 15+ scenes including landscapes, portraits, night, waterfalls, street, macro, and more. A quick-start reference for any shooting situation. PRO FEATURES AI Assistant Ask any photography question and get instant, personalized advice. Scene analysis, gear recommendations, technique tips - powered by AI and tailored to your current setup. Star Trail / NPF Rule Calculate the maximum shutter speed to avoid star trailing. Uses the NPF rule for pin-sharp stars based on your camera sensor, focal length, and aperture. Reciprocity Failure Essential for film photographers. Calculate the corrected exposure time for long exposures on film, accounting for reciprocity failure for major film stocks. Crop Factor Calculate the full-frame equivalent focal length and aperture for any crop sensor camera. Understand your actual field of view and depth of field on any sensor size. Shoot Planner Plan your next shoot in advance. Set date, location, notes, and checklist. Organize upcoming shoots and never forget your gear list. Scout Locations Save location scouting notes with map pins and photos. Build your personal library of promising spots. Shoot Log Document completed shoots with gear, conditions, settings, and notes. Build a photographic record of your work over time. Year Card Generate a shareable summary of your year in photography - total sessions, unique locations, best session, and most-used gear - all in a beautiful exportable card. Designed for photographers by photographers. Dark, instrument-style interface with golden accents. SF Mono for all technical values. Clean, focused, and distraction-free. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/