K100D overexposes with dedicated flash

Hennie · 07-31-2009, 10:55 AM

When using the pop-up flash exposure is fine, but when a dedicated flash is fitted it overexposes, with all settings on automatic. This happens with a genuine Pentax flash as well as with a 3rd party make.
Does anyone have a solution?

Oldschool · 07-31-2009, 12:28 PM

I'm not a flash expert by any means, but perhaps you can go into some more detail like: which flash, which camera, what settings, etc.

**Ash** · 07-31-2009, 02:08 PM

Is it a P-TTL flash (ie a 360, 540, 200 FGZ) - if not, you will not have correct exposure regardless of the auto setting. But more info, as above, would be handy

Hennie · 08-02-2009, 05:37 AM

The Camera is a Pentax K100D and the flash is a Sigma EF 500 Super.
I also tested with a Pentax flash designed for the K100D, belonging to a relative and the same problem exists with his flash on my Camera.
However, he uses a Pentax K100D and a K200d and we tested both flashes on those cameras and they work perfectly.
Therefore it seems as if I have a camera setting problem.

jantjooh · 08-02-2009, 06:16 AM

I believe you have to set your cam to "P-TTL auto" mode in the flash menu, when you use a dedicated flash in automatic mode. You could compare the camera settings with your friends camera.

07-31-2009, 10:55 AM	#1
Hennie Inactive Account Join Date: Jul 2009 Location: Polokwane, Limpopo Province Posts: 2	K100D overexposes with dedicated flash When using the pop-up flash exposure is fine, but when a dedicated flash is fitted it overexposes, with all settings on automatic. This happens with a genuine Pentax flash as well as with a 3rd party make. Does anyone have a solution?

08-02-2009, 05:37 AM	#4
Hennie Inactive Account Join Date: Jul 2009 Location: Polokwane, Limpopo Province Posts: 2 Original Poster	Camera and flash details The Camera is a Pentax K100D and the flash is a Sigma EF 500 Super. I also tested with a Pentax flash designed for the K100D, belonging to a relative and the same problem exists with his flash on my Camera. However, he uses a Pentax K100D and a K200d and we tested both flashes on those cameras and they work perfectly. Therefore it seems as if I have a camera setting problem.

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07-31-2009, 12:28 PM	#2
Oldschool Pentaxian Join Date: Jun 2007 Location: Central NJ Posts: 1,278	I'm not a flash expert by any means, but perhaps you can go into some more detail like: which flash, which camera, what settings, etc.

07-31-2009, 02:08 PM	#3
Ash Loyal Site Supporter Join Date: Mar 2007 Location: Toowoomba, Queensland Photos: Gallery \| Albums Posts: 23,920	Is it a P-TTL flash (ie a 360, 540, 200 FGZ) - if not, you will not have correct exposure regardless of the auto setting. But more info, as above, would be handy

08-02-2009, 06:16 AM	#5
jantjooh Junior Member Join Date: Jun 2009 Location: Netherlands Photos: Gallery Posts: 39	I believe you have to set your cam to "P-TTL auto" mode in the flash menu, when you use a dedicated flash in automatic mode. You could compare the camera settings with your friends camera.