Ttl And Qttl Mode Operation - Quantum Instruments Qflash 5d-R Series Operating Instructions Manual

QFT5D P635A 1.11_QFT5D P635A 1/11/12 1:51 PM Page 23

11. TTL and QTTL MODE OPERATION

TTL Mode
TTL mode may be used when the camera exposure is set to manual, aper-
ture or shutter priority, or program mode, and Qflash is connected to the
camera with a compatible QF series Adapter. The camera will determine
flash exposure. The listing for compatible QF series TTL adapters is avail-
able from your dealer, or at www.qtm.com. QF series TTL adapters are
generally not compatible with digital cameras.
The exposure indications for TTL mode are similar to those of Auto mode
with one exception. The amount of under or over exposure will not be
shown in the display.
QTTL mode
When using a D, Dw, or Dw-R series QTTL adapter, "TTL" is replaced by
"QTTL" on the Qflash display. QTTL mode has all the features of the Auto
Fill mode including adjustment of fill ratio. The difference is that QTTL
mode lets the camera, not Qflash, control exposure.
Set your camera to manual, aperture or shutter priority, or program mode
for QTTL dedication to Qflash 5d-R.
Some cameras allow compensation (+/-) for flash/fill ratio. Qflash 5d-R
flash/fill can also be set on the QTTL adapter using the "Fill" dial. Choose
any setting from –3 stops below to +2 stops above the camera's aperture,
in 1/3 stop increments. When using the "Fill" dial on the QTTL adapter, set
flash compensation on your camera to zero.
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