irinel_dimitriu

<p>Thank for your responses. Yes solution is in exposure time, and it working good. It must be a little longer. I didn't read the entire user's manual of my flash carefully. I was lazy.<br> Now its easier ( in formula), in reality is still dificult. :(<br> shutter speed =number of flashes per frame/frecvency of flash<br> The rest is a lot of exercises, ideea, patience and a model. :)</p>

<p>Can anyone help me? Am I stupid or blind? I simply cannot realize why it don't wanna work. Both nikon official site support and d3100 manual say that those are compatible in this case :<br> https://support.nikonusa.com/app/answers/detail/a_id/886/~/d-slr-and-nikon-speedlight-compatibility------2nd table<br> https://www.manualowl.com/m/Nikon/D3100/Manual/116830?page=190------2nd table ,or pag 174<br> SB 28 in repeating flash mode , power set to 1/64 , 3-4 flash/frame, 4 Hz ( maybe other settings)<br> D3100 in M mode ,portrait, A,... lens manual or G series. Just one flash :(<br> What is wrong? what i must change ( not the flash -- sb800/900 is too expensive) :)<br> Any suggestion, experiences, ideea?<br> Thanks</p>