Originally posted by geomez
Did you put the flash in wireless mode?
No need unless you're triggering optically.
---------- Post added 01-10-2015 at 06:20 PM ----------
Originally posted by Rudy
I was investigating these triggers too and I found this video that says 603c version 1 does not work with Pentax but 603n ii and 603c ii (version 2) works with Pentax. I think I will buy 603n ii
http://youtu.be/UFt0ADfaqsQ You're correct version 1 doesn't work with Pentax.
The n and c II are the same triggers the difference is the shutter cable. Buy the C version to get the shutter cable that works with Pentax. They work fine on my K30.