9th March 2005, 12:50 AM
hi guys. i'm changing to a new flash unit. I realise din realli use my flash unit to its maximum. I always use ITTL. like to know if any1 can explain d concept behind manual usage of flash. how to do slow flash sync, rear curtain syn. is fill in flash auto? coz realise when i shoot portrait, sometime it flash, sometime it din. thanks alot
9th March 2005, 01:08 AM
Slow sync flash is flash with a slow shutter speed to expose for the ambient light. (normally used with rear curtain sync)
Rear curtain sync : the flash fires at the end of the exposure instead of the start.
9th March 2005, 01:18 AM
the other modes gives you more room to play around with in flash photography. like with rear sync flash, you can take a pic of a person moving with a light trail behind him.
9th March 2005, 11:35 AM
maunal flash must use the age-old equation :
aperture(numerical value) x distance = guide number
guide numebr is a number assigned to the flash as a measure of its maximum power output