Originally posted by Shanti would they work as slaves with a Pentax trigger or whatever its called TTL..
They will work fine as slaves but you will need to trigger them either with optical triggers like this:
Amazon.com: Seagull SYK-4 Optical Slave Trigger with PC Sync Socket: Camera & Photo or with radio triggers like these:
Amazon.com: Cactus V5 Wireless Flash Trigger: Electronics.
They will not work with Pentax TTL (P-TTL) either mounted on the camera or by using the pop up flash to trigger. If you try to use the pop up in wireless trigger mode the slave flashes will see the Pentax pre-flash as it meters and go off then, instead of when the real trigger flash occurs a split second later.
Note the links are just for information there are many brands and solutions I just got those in a quick search. I do use the Cactus v5 ones myself and would recommend them but there are other solutions both more and less expensive.
You will need to be able to set the power on the slave flashes manually, I am not familiar with either of those so I cannot help there. You can change the power by using switches or menu on most flashes or by moving them farther away or adding diffusion material. I use Pentax AF200t flashes because they have a simple slider on the back to change the power. Quick and easy, no menus.