AF540 and K7- pttl

SOldBear · 03-16-2011, 10:38 PM

Originally posted by HGMonaro

yeah but... I want the off camera flash to be the main/only light source. Correct me if I'm wrong, but I thought it was capable of this? IF so, what settings should I have (on camera and flash)

The remote (slave) flash can be the main source, but it can NOT be the only source.

In wireless flash, the built-in flash (or the flash attached to the camera) ALWAYS fires during exposure. If you set it as the control, the strobe will be weaker than when it is set as the master. But there is no way to prevent the control/master flash from firing.

This applies not only to Pentax p-TTL, but also to all flash techniques that use a preflash strobe.

The only way to NOT have the built-in flash to fire is to use RF remote, or a long flash extension cord.

SOldBear · 03-17-2011, 05:27 PM

Originally posted by Ex Finn.

...540 is able to fire as a remote main flash.
With no light contribution to the picture from the on-board control flash...

Don't take anyone's words.

Try taking a photo with the flashes in front of a mirror to find out for yourself...

HGMonaro · 03-17-2011, 07:59 PM

I realise the camera's flash will fire (hopefully at a reduced amount as to not affect the image) but should my camera be set to 'control' and AF540 for 'master'. That's how I thought I read the manual (can't find it at the moment... I should go and download it I guess!!!) but my AF540 will only fire when it is set to 'slave' which I don't think is right??

BTW, I think this thread is hijacked!!!!

sifun · 03-22-2011, 07:10 PM

Okay so I did PTTL with the 2 second timer, and indeed I was crazy my PTTL works.

Perhaps its just the results I get from what I see, I have whitebalance set at flash or even auto, and it seems that the skin tones are so over whitened and un-natural.

Should I be using a custom white balance for flash for correct skin tones?

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03-16-2011, 10:38 PM	#16
SOldBear Veteran Member Join Date: Feb 2009 Location: Alameda, CA Posts: 3,206	Originally posted by HGMonaro yeah but... I want the off camera flash to be the main/only light source. Correct me if I'm wrong, but I thought it was capable of this? IF so, what settings should I have (on camera and flash) The remote (slave) flash can be the main source, but it can NOT be the only source. In wireless flash, the built-in flash (or the flash attached to the camera) ALWAYS fires during exposure. If you set it as the control, the strobe will be weaker than when it is set as the master. But there is no way to prevent the control/master flash from firing. This applies not only to Pentax p-TTL, but also to all flash techniques that use a preflash strobe. The only way to NOT have the built-in flash to fire is to use RF remote, or a long flash extension cord.

03-17-2011, 05:27 PM	#17
SOldBear Veteran Member Join Date: Feb 2009 Location: Alameda, CA Posts: 3,206	Originally posted by Ex Finn. ...540 is able to fire as a remote main flash. With no light contribution to the picture from the on-board control flash... Don't take anyone's words. Try taking a photo with the flashes in front of a mirror to find out for yourself...

03-17-2011, 07:59 PM	#18
HGMonaro Veteran Member Join Date: Apr 2007 Location: Melb. Aust Posts: 840	I realise the camera's flash will fire (hopefully at a reduced amount as to not affect the image) but should my camera be set to 'control' and AF540 for 'master'. That's how I thought I read the manual (can't find it at the moment... I should go and download it I guess!!!) but my AF540 will only fire when it is set to 'slave' which I don't think is right?? BTW, I think this thread is hijacked!!!!

03-22-2011, 07:10 PM	#19
sifun Forum Member Join Date: Dec 2009 Location: Melbourne, Victoria Photos: Albums Posts: 58 Original Poster	Okay so I did PTTL with the 2 second timer, and indeed I was crazy my PTTL works. Perhaps its just the results I get from what I see, I have whitebalance set at flash or even auto, and it seems that the skin tones are so over whitened and un-natural. Should I be using a custom white balance for flash for correct skin tones?