Compatibility ?
Posted 08/10/2015 - 23:58
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Your problem is due to the AF280t is a TTL flash and not a PTTL one.
Your camera and AF360FGZ use PTTL, so work together fine so long as the flash is set to use PTTL. In PTTL the camera controls the remote flash using light signals from the camera flash. This preflash sends information to the remote flash before taking the picture, then the main AF360 flash fires, being controlled by the camera meter.
The AF280 uses the TTL system,designed for older film cameras. It will not work with the K7 in TTL mode. You can use it if you set it to automatic mode, where the camera does not control the flash. The it uses it's own photo cell, but you will need to either have it on the hot shoe or use cable or radio control to fire it. You can also use it in manual mode.
When you use the AF280 with the AF360 , the preflash signaling will set off the slave cell on the AF280 flash before the camera is ready and will probably interfere with the signal to the AF360. The AF280 cannot be controlled by the camera meter at all and using the two flashes together will cause problems.
Your camera and AF360FGZ use PTTL, so work together fine so long as the flash is set to use PTTL. In PTTL the camera controls the remote flash using light signals from the camera flash. This preflash sends information to the remote flash before taking the picture, then the main AF360 flash fires, being controlled by the camera meter.
The AF280 uses the TTL system,designed for older film cameras. It will not work with the K7 in TTL mode. You can use it if you set it to automatic mode, where the camera does not control the flash. The it uses it's own photo cell, but you will need to either have it on the hot shoe or use cable or radio control to fire it. You can also use it in manual mode.
When you use the AF280 with the AF360 , the preflash signaling will set off the slave cell on the AF280 flash before the camera is ready and will probably interfere with the signal to the AF360. The AF280 cannot be controlled by the camera meter at all and using the two flashes together will cause problems.
Bob
Posted 20/10/2015 - 17:30
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Thanks for that, Bob. I did try to shoot later on with Sigma EF 500 flash gun in manual mode and it's work. I think your right about Pentax AF280;
"When you use the AF280 with the AF360 , the preflash signaling will set off the slave cell on the AF280 flash before the camera is ready and will probably interfere with the signal to the AF360"
Thanks for your help.
Saso E.
"When you use the AF280 with the AF360 , the preflash signaling will set off the slave cell on the AF280 flash before the camera is ready and will probably interfere with the signal to the AF360"
Thanks for your help.
Saso E.
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41 posts
21 years
One question about flash photography ... I'm shooting with K-7 and AF360FGZ flash unit in Slave mode. If I'm photographing only with this flash unit, exposure sems to be OK but if I try to use another one (AF280T) with Hama slave cell connected to that second flash, exposure is incorect. The photo is totaly underexposed. I try to trigger both flashes remotly with in-build camera flash as controller but faild every time. I can't sort out the problem. Is it posible that exsposure meter in the camera calculate wrong values? Or is it absolutely necessary to have two identical flashes in this situation two AF360FGZ or one 360 an second one AF540FGZ?
Thank you for your answers and best regards to all...
Saso E.