Wendy Another thing which I have read is that the guide numbers are based on the flash being used in an averagely reflective room. Outdoors the guide number is effectively reduced by one stop. So the 36 0f the 360 Pentax flash becomes 25.
The other dodge to watch out for is which focal length the guide number is quoted at. Not many quote for a 35mm lens as once they did. More likely 100. I suppose one ought to allow for the APSC sensor factor as well. Happily before you enrol on a maths degree and paint your room 18% grey, a mixture of chimping and bracketing works a lot more easily. Peter On 28/02/2008, wendy beard <[EMAIL PROTECTED]> wrote: > Ok. Think I've got it. > So looking at the table - f8 and ISO 100 with the flash at full power > will illuminate correctly objects at a distance of 2.7m > > thanks everybody! > > Wendy > > -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
