Does anyone knows the guide number of the Vivitar flash 285?

-- Alberto (arobles@coqui.net), May 03, 2000

Answers

According to the manual: at normal head position it is 120 for ISO 100 film, at wide head position it is 100 and for tele head position it is 140. These tend to be actually too high in real world use since the manufacturer's testing methods are done under lab conditions. I would suggest dropping the GN about 10 to 20 points for actual shooting. Run a test for your camera amd film using the above info as a starting point.

-- Todd Frederick (fredrick@hotcity.com), May 07, 2000.