Originally posted by Ken T Pentaxians,
Does the K30 still use highest ISO of the Auto ISO range in TAv Mode with flash on ?
Is there any way for us to use TAv with flash and the camera uses proper ISO to make correct exposure, without getting the image way overexposed with too high ISO ?
Would somebody sheds some lights for me please. Thanks.
From what I can tell, the only logical mode for flash photography on the K-30 (all models?) is Av. I just did a test using the built-in flash:
No flash - Av mode
F 5.6
1/40
ISO 6400
With flash - Av mode
F 5.6
1/40
ISO 400
I say "logical" but there are random times when I've seen the shutter speed go higher without flash than with. Seems that's when you allow the ISO to float to 12,800.
If I switch to TAv mode, I get the same ISO setting both with and without flash so this is why I don't think Pentax has set up their cameras to work correctly in TAv mode under flash power. All I get are the same speed and shutter (expected) but the ISO doesn't auto-adjust downward to compensate for the extra flash lighting -- over exposed as a result.
Haven't tried it with the 360FGZ external flash but I may do that later.
Edit: repeated with 360FGZ
Essentially the same result as the built-in flash. In Av mode, the ISO adjusts downward to compensate for the addition of strobe lighting. In TAv mode, the ISO remains the same with or without flash resulting in major overexposure with the flash.
Additionally, in Av mode I had to dial in +1.0 FEC for the 360FGZ to get the image correctly exposed and the same as with the built-in flash. One more reason why us folks don't think Pentax has done enough to sort out all of the flash issues on their equipment.