On Ven, 30 gen 1998 23:07, Rand E. Tomcala <mailto:rtomcala@xxxxxxxxxxx>
wrote:
>Jim,
>I don't have the curve that you refered to, but the Shipman87 book gives
>this chart for the F280 flash working distance vs shutter speed.
>Shutter speed working distance (this refers to OM77AF f1.8, ASA100)
>100 13 (feet)
>125 9.3
>250 6.3
>500 5.3
>1000 3.7
>2000 2.7
>*flash only, ambient light extends distance
>Although this chart was done with the OM77AF, I think that the data is
>totally indicative of the characteristics of the flash unit.
>Rand E.
>
Cause 77AF does have a faster synchro speed, I think the GN should be quite
less on a OM-4. The difference should be about one stop.
Marco
##################################################################
# This message was delivered via the Olympus Mailing List
# To receive the Olympus Digest send mail to: listserv@xxxxxxxxxxxxxxx
# with subscribe olympus-digest in the message body.
#
# To unsubscribe from the current list send a message to
# listserv@xxxxxxxxxxxxxxx with unsubscribe olympus in the message body.
#
# For questions email: owner-olympus@xxxxxxxxxxxxxxx
##################################################################
|