When using fill flash one does not use a slow sync speed. If the
ambient light is sufficiently bright to cast noticeable shadows a slow
shutter speed is likely to require undesirable or even unattainable
small apertures. The E-M5 is especially bad in this respect due to its
minimum 200 ISO. Take the worst case, full sun. If we use the sunny 16
rule at ISO 200 we need f/16 at 1/200. The E-M5 has a nominal max sync
speed of 1/250. My own E-M5 will sync at 1/320 (the spec for the E-M1).
At 1/320 the sunny 16 rule would call for f/13. Quite probably still
an undesirable aperture even at the maximum sync speed.
All that said, I have not actually tried fill flash with the E-M5. When
I did need it I grabbed the Canon 5D instead with its 1/200 sync speed
and minimum 50 ISO.
I also admit to having no experience at all with flash units offering
high speed sync. Perhaps that solves they sync problem but I have
always wondered if the light output is sufficient for full sun fill.
Dr. Flash
On 12/28/2013 12:49 AM, Moose wrote:
> * Relatively slow sync with shutter shock may be a real problem for
> some folks using fill. I just don't know enough about flash to give a
> meaningful opinion. My solution was to grab an Oly with SS delay.
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|