#maximum guide number

Olympus E-1 Digital SLR System This is the world s first 100% interchangeable lens SLR System designed from day one exclusively for digital photography. Olympus FL-20 Electronic Flash for SP series, C5000, C750, C770, C5060, C7070, C8080, E1, E300 The new 4/3 type image sensor is designed to achieve the optimal balance between image quality, camera size and system expandability. This state-of-the-art 5.08 megapixel CCD delivers groundbreaking edge-to-ege sharpness. The E-1 is an uncompromising realization of the full benefits of pure digital technology with body and lenses designed to perfectly match the image sensor. Its Zuiko Digital Specific Lenses deliver higher resolutions, faster aperture speeds and focusing and more compact sizes than equivalent 35mm lenses built for digital. Lightweight. Pocketable. Perfect for simple and direct flash needs. The FL-20 Flash has a maximum guide number of 65 feet/20 meters at ISO 100 and features manual, auto and auto TTL control for increased creative flexibility. Fits perfectly in a shirt pocket or camera bag pocket for quick and easy flash when and where it s needed. Item Specifications: Product Description: Olympus FL 20 - hot-shoe clip-on flash Camera Flash: Hot-shoe clip-on flash Dimensions (WxDxH): 2.2 in x 1.1 in x 3.8 in Weight: 2.6 oz Guide Number (m / ISO 100): 20 Lens Coverage: 35mm Supported Exposure Control: TTL Color Temperature: 5500K Required Battery: 2 x battery - AA type Carrying Case: Soft case

Canon Speedlite 550EX - Hot-shoe clip-on flash - 55 (m) Speedlite 550EX is the main component of a flash system designed together with the EOS-3 SLR camera. It provides full compatibility with the area AF technology employed by the EOS-3 and refined E-TTL autoflash for improved performance. Other main features include a maximum Guide Number of 180 (ISO 100, ft.), an AF-assist beam which links to the EOS-3's 45-point area AF, FP Flash (high speed sync), FE lock (a flash version of AE lock), and FEB (Flash Exposure Bracketing). The Speedlite 550EX also incorporates a built-in wireless transmitter, which can control other Speedlite 550EX units set up as slave units. Flash coverage is set automatically from 24mm to 105mm, and a wide-angle panel extends the coverage to 17mm. The Speedlite runs on 4 AA-size batteries, and can also be used with optional external power supplies such as Compact Battery Pack E and Transistor Pack E.