Dig I sky is the first of a new generation of compact and lightweight multi-function exposure meters from Gossan. This is the perfect tool for photographers who demand flexibility, accuracy and consistency. The clear, bright TFT color screen provides an instant, easy-to-read display in any mode, whatever the ambient conditions, while the large controller ring and selector button make for simple and quick one-handed operation. All measuring values may be indicated in full, 1/2 or 1/3 f-stops. The built-in Sky port remote radio trigger removes the need for cables to fire studio flash and offers up to 4 Flash groups that may be selected and triggered on 8 different radio frequencies, allowing the simultaneous use of different lighting sets in the same location. Fully up date able, Gossan is the first exposure meter Manufacturer to be able to offer free software upgrades. Technical Specifications: contrast measuring principles and sensor incident light and reflected light, 2 SBC silicon photo diodes, color-corrected; processing of measuring values digital repeat accuracy 1 digit (=0. 1 EV) incident and reflected light ev-2. 5 to EV +18. 5 incident and reflected light f/1. 0 to f/90 film speeds ISO 3/6° to 16000/43° in 1° DIN correction values EV -5. 0 to +5. 0, adjustable in 1/10 EV steps measuring value resolution 1/1, 1/2 UNC 1/3 EV steps (measuring value correction in 1/10 EV steps) shutter speeds 1/8000S up to 30 min (standard value) Flash synch speeds 1/1000 s to 1 sec (synch speed) noncore RF remote triggering Lunchroom (Sky port and sky speed). dimensions approx. 139 x 60 x 16 mm (with Diffusor 24 mm) delivery contents exposure meter with carrying bag, strap, rechargeable battery, battery re-charger, CD with software.