Quantum Qflash T4D, 10D TTL ???

[dennykyser]

I bought the Quantum Qflash T4D and the QF13N TTL adapter for my canon 10D but cant get the TTL to work, I have tried in AV mode and Program mode and the flash fires but shutter speed is extremely slow and obviously blured picture. I can not get the Camera to realize the flash is on. Does anyone have any sugestions to try.

[Quinn Porter]

You will get a lot of help if you post the same message over in the Fred Miranda Wedding Photography board. Quantum flash setups are discussed much more frequently there, and there are some regulars that are very knowledgeable about them.

[dennykyser]

Thanks Quinn I posted over there. I have checked this on both my 10D and 7E so know its not the camera. I cant get it to go into QTTL for some reason.

[scottbergerphoto]

I use the Q Flash T2D with the same TTL cable (13N) on a 10D with no problems. The flash should read QTTL on the LCD when the cable is in the hot shoe and the mode button is pressed to shift you through the modes.

In all camera modes the camera meter will measure the ambient light and give a shutter speed consistent with that. P mode limits the lowest shutter speed to 1/60 sec in flash. That would account for blurred backgrounds but the subject should be nailed. Cfn. 3 allows you to fix the shutter speed at 1/200 in Av mode.

Can you be more specific as to what the problem is?

Regards,
Scott

[dennykyser]

The flash wont read QTTL, it will only read TTL. It will not use a sync speed shuutter speed, it uses a long exposure, what ever the ambient light reading is. Works the same on both my Elan 7E, and my 10D.

[scottbergerphoto]

I don't know what you mean by, "It uses a long exposure." The exposure time is determined by the camera. The flash burst is about 1/10,000 sec. Do you mean that the flash won't fire if you set the shutter speed faster then what is recommended by the meter for ambient light?

I don't know why it is not recognizing your camera and going into QTTL. It could be a bad cable or flash. What happens if you use the PC Cord connection instead of the hot shoe and shoot in Manual or Auto Flash modes?
Scott

[dennykyser]

Setting in AV mode at f/4.0 the flash on in TTL mode, the shutter speed will not sync at 1/125 or 1/60 it sets it at whatever available light is like over a second.


I know it should recognize a flash and set the shutter speed at 1/60, 1/125 or if I change CF3 to 1/200 would sync there. Well it doesnt, in AV mode I set the f stop to f/4.0 and the shutter speed goes to a really long time, depending on where I am when I take the reading.

[scottbergerphoto]

There seem to be two issues:
1. The flash should not set your camera to any particular shutter speed. In P Mode, the shutter speed should not drop below 1/60 in flash mode or below 1/200 in Av Mode with Cfn 3.set as such. In all other cases the camera tries to expose for ambient light, flash present or not.

2. Your flash is not recognizing that it is attached to an ETTL camera for some reason. If it did it would switch to QTTL. Since it happens on both your cameras, you have a bad cable or flash. I suggest you giive Quantum a call on Monday. They are in NYC (Queens).

Good Luck,
Scott

[dennykyser]

Thanks Scott, I agree there is a problem between flash and camera. for some reason it seems to work fine in auto mode. I used it today but woudnt even count on the cord for auto, I used the other cord and my pocket wizard and used it in Manual. I love the flash tons of power and portable.

I am not a huge fan of TTL, or ETTL but do want that flexibility sometimes.