Yeh,
Manual GN is weird. This high voltage thread jolted my memory now. I
recall Tim commented about two years ago that the
tubes are in series (no independent supplies) and the conversion
efficiency is reduced with two tubes. I believe he said there also was
more juice left in the cap as it fires to the extinction voltage of the
tube and not to 0 and thus more juice is left in with two tubes in
series.
Now need to decide whether to try Portra 400 VC-3 or try to carry
around the T28 in the hot shoe and a T32 on one of the Lepp bracket
arms and try Ektar 100 or Portra 160 for the lepidoptera outing. Not
sure how Walt manged with his bug portrait rig, but with a 135mm focal
length and the increased working distance, I usually don't have enough
photons with the T28 on a Lepp bracket. He must have positioned the
angled T28
flash closer somehow with the Kalt shoulder gizmo--never have seen what
he was talking about.
Mike
Chuck states:
Manual is available on the eSIF. I too think the guide number is
strange. Even stranger is that the guide number with one flash is
higher than with two.
Chuck Norcutt
usher99 [at] aol.com wrote:
Thanks, Piers.
I should find a a manual for it. Seems very odd that one manual
mode isn't just a full dump.
Seems I can't reduce the bulk of the Lepp flash bracket T32/T28
butterfly rig w/o the single flash version.
Thanks again for the info--appreciated.
Mike
Disconnect, no (disable, yes, but that won't reduce the bulk).
GN with one flash disabled is indeed 28 (meters, ISO 100) but only
in TTL auto mode, according to the manual which asserts that in Manual
mode, the GN
is 22 (high) and 9 (low).
Piers
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|