Note that the T32 will shoot down to 0.25 meter in TTL. On normal auto
minimum distance decreases as you close down the aperture... cutting the
brightness of the light ala ND3. I'm not sure I understand why. I'd
have thought it was purely a matter of distance based on speed of light
and speed of the electronics. But it's clearly more complicated than that.
If shooting on digital I think I'd just make up a distance/exposure
table by trial and error. Don't forget that in normal auto mode you can
lie to the flash about the ISO being used. If you want to cut a couple
of stops tell the flash the ISO is 400 when the camera is actually set
at 100. I do that when using the T32 as fill flash on digital. I
usually set it 2 stops down. That typically underexposes the shadow
fill but eliminates risk of overdoing it. The shadows may still need a
bit of brightening but reduces the amount they have to be brightened.
Chuck Norcutt
T32 specs
---------
TTL AUTO
Aperture setting: continuous, accords with aperture ring setting of
camera-linked lens.
Working range: 0.25m-26m (100 ASA, F1.2 lens).
Bounce flash: with built-in bounce mechanism of Flash Diffuser Window or
Power Bounce Grip 2 + TTL Auto Cord T 0.3 or 0.6m.
Flash confirmation: flash ready and flash OK LED on the flash.
Viewfinder indication contact provided.
NORMAL AUTO
Aperture setting: Choice of three apertures (F4, F5.6 and F8 at 100 ASA).
Sensor Acceptance Angle: approx. 20°.
Working range: 1m-8m (F4, 100 ASA),0.7-5.6m (F5.6, 100 ASA) , 0.5-4m
(F8, 100 ASA) .
Bounce flash: with built-in bounce mechanism of Flash Diffuser Window.
Flash confirmation: flash ready and flash OK LED on the flash.
Viewfinder indication contact provided.
On 7/7/2014 7:41 PM, Mike Gordon via olympus wrote:
Recalled that the T32 in TTL or normal auto can only get so close as
can't send the quench signal fast enough. I suspect it depends
on which cam as well in TTL but have never read anything exact accept
what is in the T32 manual. For kicks when I tried it on digital at about
1:2 mag on a 125 macro, the normal auto mode it
waaaay overexposed. I had thought that in part due to the angle of
acceptance being 20 deg or so for the flash metering with a distant
background. The flash doesn't know anthing about the real FOV of course
in normal auto mode. Then last summer for kicks put the 3 stop ND filter
that comes with the set of filters for the T32 and the metering wasn't
half bad--within a stop or so in many circumstances and not really that
different than ETTL that requires FEC anyway. So I was mostly wrong and
the speed of quench signal was the major issue.
I don't have a macro flash bracket except the Lepp II which is great for
OM but it won't easily hold a big flash.
So how close can the T32 get in normal auto with the ND filter? It gets
complicated with light lost due to extension etc. Perhaps I've
rediscovered the wheel. Suspect this differs in TTL on OM and probably
dpends on which cam as well. Not sure why I did't try putting a ND
filter on it before. The flash time must be longer and allows time
for a proper quench signal. The T32 is much lighter to lug around for
hours obviously. Wish it had a few more auto choices though.
Bug blinder, Mike
--
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