Originally posted by Zafar Iqbal I missed this. What speed will it sync to?
I got 1/90 reliably, sometimes I'd get lucky at 1/125.
Originally posted by darrenleow could you share some documentation about this please? i have the canon version, learnt to live without 1/180s, but im interested in getting my 1/180s back maybe with another product
The trigger looks for a signal on one of the hotshoe pins to know when you've half pressed the shutter. The Nikon trigger has a layout that lines up with Pentax hotshoe, but Pentax doesn't use that pin for that kind of signal, they use it to send data. So the Pentax hotshoe isn't going to send a steady voltage to wake up the trigger. Adding a small capacitor between that pin and ground will filter this data signal into a steady voltage that will wake up the trigger, I think I used a 10uF 16V standard electrolytic.
This won't work with the Canon trigger, the pin layout is wrong. I was able to buy a Nikon trigger for $10 and it worked fine with the receivers I already had from the Canon kit. Before I learned of this modification, I was using a rubber band to hold the top button of the trigger half way down, which will work with the Canon and Nikon triggers. Some people solder in a switch to accomplish that, but it is less work to just add the capacitor.