Whether you use a flash as main light or a fill, the Flash X-Tender is a must with lenses 300mm or longer.
This unit weighs less than 3 ounces and folds flat for storage.
The Flash X-Tender increases your flash output by a minimum of 2 full stops
(3 stops from a flash's 50mm setting).
The FX-5 Model custom fits:
Weight: 95 grams