On Tue, 08 Mar 2005 18:35:25 GMT, Owamanga , wrote
in :

On Tue, 08 Mar 2005 13:10:05 -0500, Alan Browne
wrote:

bob wrote:

T.N.T. wrote:

the D70's flash sync speed of 1/500s at
ISO200 vs 350D's 1/200s at ISO100 is just 1/3 stop different, not
as much an advantage that 1/500s vs 1/200s makes it out to be. That
makes it 16-15 for D70.

Thinking about this some more, you'd need twice the power output to
illuminate the same scene if you drop from ISO200 to ISO100,
effectively cutting your flash power in half, limiting ranges,
doubling recharge times etc. This just isn't a good comparison.

You seems to think the aperture always get stuck and can't be opened up
or ISO can't be changed to 200 or something.

snip

Flash photography is always 2 exposures, ambient and flash, at the
same time.

You missed the killer, the big one, the real reason for fast sync:

It lets you fill-flash in broad daylight, dark Churches or anywhere in
between.

You seems to miss the ISO setting aspect. For the same ISO, faster flash
sync is, of course, always better and always wanted in fill flash to
enable the use of wider aperture opening, which brings the main
desireable effect - shallower DoF. For a higher minimum ISO setting, a
proportionately higher flash sync is a "necessity" in order to get the
same aperture effect. The ability to freeze ambient light in fill flash
is a plus, but minor and in rare situations.


--
T.N.T.

Lbh xabj jung gb qb vs lbh rire jnag gb rznvy zr.