I disagree and think you have misunderstood my two (unrelated) comments.
Low ISO helps non-high-speed sync flash precisely because the
brightness problem *is* the ambient light. A flash as powerful as the
T-32, for example, has plenty of power for daylight fill and can easily
deal with the lowered ISO. My concerns about flash power had to do with
high-speed sync where the ambient light problem is being handled by the
shutter.
Chuck Norcutt
On 12/29/2014 6:23 PM, C.H.Ling wrote:
Low ISO will not help fill flash, fill flash effectiveness only affected
by ambient light, shooting distance and flash power. You need high flash
power to get long working distance, reduce ISO will reduce flash GN at
the same time.
C.H.Ling
----- Original Message ----- From: "Chuck Norcutt"
<chucknorcutt@xxxxxxxxxxxxxxxx>
I don't know why Canon did it but I see low ISO as an aid to bright
sun fill flash. It may well have reduced dynamic range but that may
be a small penalty to pay for getting the shot at all. You can maybe
solve the problem with high-speed sync flash units but that produces
problems of another sort... the flash range is pretty short because it
requires a lot of flash power to fire the flash multiple times in a
short time interval. Even so, I (grits teeth) am actually considering
buying a Metz 52-AF1 digital flash for micro 4/3 cameras. It's
regularly $289 (same as an FL-600R) but it's more powerful and has a
$60 rebate from Bogen/Manfrotto if you buy by the end of January.
B&H's site says by the end of December 2014 but if you download the
actual rebate form you'll see it's January 2015. B&H error or big fib??
Dr. (don't say it, TTL) Flash ???
--
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