inconsistent flash output

[Z10silver]

Hello, I am using the Cognisys scout system with a pair of wired SB-28 flashes (modified connections) and a Canon 6D. The Scout trigger is working great. However, I'm finding that I will consistently have the first shot brighter than the second, and the second brighter than the 3rd. It appears that the flash output is going down progressively. I have attached an example. I was shooting in "burst mode" and switched to using a 0.5 sec pause between shots but I am still having the issue. Attaching example. Flashes are set at 1/2 and 1/4 power. Shutter is 1/160.

Thank you,
Zach

183

184

[-jeff]

It sounds like you have either a weak flash or weak batteries. What kind of batteries are you using? Another product for short recycle times you might look for a Nikon SD-8A or one of the many Chinese copies.

185

This will speed up recycle times.

Hope this helps.

[Z10silver]

Hi Jeff, I'm using eneloop rechargeable batteries

[-jeff]

Do both flashes have the same issue?

[Z10silver]

Yes, the problem seems to have improved by increasing ISO and lowering flash power. I'm still working on finding a balance so that there is no decrease in flash output between shots.