National Photographic Services Apps

Manual Flash Calculator provides a handyutility for determining subject distance when using photographicflash manually. It's quick and simple to use for tricky lightingsituations where TTL auto-flash can struggle.Key Features:• Aperture range F/1.2 to F/22 in 1/3 stop increments• ISO 50 to ISO 6400 in 1/3 stop intervals• Flash output fractions from 1/1 to 1/128th power• Flash exposure compensation to +/- 3.0 EVNOTEManufacturers can be a little optimistic about their publishedflash Guide Numbers, particularly for scenes that lack reflectingsurfaces (eg. outdoor locations). Also be aware that the guidenumber for flash units with zoom heads is different at each zoomsetting.

A tool for photographers who prefer manually working with flashguide numbers

Sun Map is a solar event utility for the outdoor adventurerandphotography enthusiast. It is the ideal companion to help youplana photography shoot, or simply find the perfect vantage pointtoview a sunrise or sunset, for any date, anywhere in the world.KeyFeatures: • Time and direction of sunrise, sunset, and noontransit• Compass-driven map-rotation (on supported devices) •Search bylandmark, locality, or street address • GPS positioning ofyourcurrent location • Drag and drop map pin for exact placement•Local time zone and elevation above sea level • Correctionforatmospheric refraction and elevation • Correction forlocalmagnetic variation • Map types include: terrain, satellite,andhybrid • Touch gestures for map zoom, tilt and rotation • Storeanunlimited number of favourite locations • Capture map snapshotsforoffline use • Supports landscape and portrait orientation•Compatible with both phone and tablets Technical Notes:Thesunrise, transit and sunset calculations implement thealgorithmdescribed in: Solar Position Algorithm for SolarRadiationApplications (Technical Report NREL/TP-560-34302, RevisedJanuary2008) by Ibrahim Reda and Afshin Andreas, based on thealgorithmdescribed by Jean Meeus. Limitations: • Requires anInternetconnection for full functionality • Accuracy reduces aroundthepolar regions • Auto-rotation requires a hardware compatibledevice• More features will be coming, so give us feedback...

A tool for photographers who prefer manually working with flashguide numbers