K100D and AF500FTZ

dbuffington · 01-21-2009, 10:39 AM

Hi Folks!

I stumbled onto a nice clean AF500FTZ flash, and I've tried it on my K100D.

The flash is set for TTL and Auto Zoom. The body is set on "P".

The problem is that the flash appears to do a full power dump. All the images are almost completely washed out.

Do I have one of the settings -- on the camera or flash -- wrong?

Thanks!
Dave

**Lowell Goudge** · 01-21-2009, 10:48 AM

the AF500FTZ only supports TTL and manual modes, and the K100 does not support TTL but only P-TTL

the flash can only work in manual mode on this body.

The flash is an excellent flash, but use on a DSLR is limited to *istD and DS which both support TTL flash.

Note TTL flash has a sensor that reads light reflected back off the film (or photo sensor UV screne) and therefore measures actual light through the lens.

P-TTL flash uses a sensor off the viewing screen (like normal metering) and a preflash before the mirror goes up, and then calculates the flash duration based upon the known open apature of the lens, the stop-ped down apature set by the camera body and the amount of light it recieves back from the preflash

01-21-2009, 10:39 AM	#1
dbuffington Junior Member Join Date: Feb 2008 Posts: 44	K100D and AF500FTZ Hi Folks! I stumbled onto a nice clean AF500FTZ flash, and I've tried it on my K100D. The flash is set for TTL and Auto Zoom. The body is set on "P". The problem is that the flash appears to do a full power dump. All the images are almost completely washed out. Do I have one of the settings -- on the camera or flash -- wrong? Thanks! Dave

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01-21-2009, 10:48 AM	#2
Lowell Goudge Site Supporter Join Date: Jan 2007 Location: Toronto Photos: Gallery \| Albums Posts: 17,888	the AF500FTZ only supports TTL and manual modes, and the K100 does not support TTL but only P-TTL the flash can only work in manual mode on this body. The flash is an excellent flash, but use on a DSLR is limited to *istD and DS which both support TTL flash. Note TTL flash has a sensor that reads light reflected back off the film (or photo sensor UV screne) and therefore measures actual light through the lens. P-TTL flash uses a sensor off the viewing screen (like normal metering) and a preflash before the mirror goes up, and then calculates the flash duration based upon the known open apature of the lens, the stop-ped down apature set by the camera body and the amount of light it recieves back from the preflash