Flash probalem

Ok i just got an external flash from a member on here it is a sigma ef-500 dg super .
When i take the first picture it's ok then i got to wait a very long time for it to flash on the next picture then once it's ready it will flash for 2 pictures then on the third picture it flashes really really bright and blows up the picture with flash . is this normal ?

My setting are :
Flash Mode: ETTL
Camera settings: flash exp. comp 0 , E-TTL II EVALUATIVE
I'm in indoors with bulb lighting and my ISO : 800 , Shutter: 1/640 , aperture: f10

I did put used battery in the flasher from old remotes can that be a possibility ?

Paul-R wrote in post #12103632
Ok i just got an external flash from a member on here it is a sigma ef-500 dg super .
When i take the first picture it's ok then i got to wait a very long time for it to flash on the next picture then once it's ready it will flash for 2 pictures then on the third picture it flashes really really bright and blows up the picture with flash . is this normal ?

My setting are :
Flash Mode: ETTL
Camera settings: flash exp. comp 0 , E-TTL II EVALUATIVE
I'm in indoors with bulb lighting and my ISO : 800 , Shutter: 1/640 , aperture: f10

I did put used battery in the flasher from old remotes can that be a possibility ?

I would go with a slower shutter speed. Try 1/60, and then maybe 1/250. Also switch to Man.

ranger50 wrote in post #12103657
I would go with a slower shutter speed. Try 1/60, and then maybe 1/250. Also switch to Man.

i am in "M" mode i tried every shutter speed possible nothing wrong there it's the flasher it self that is giving me problems i just want to know is it normal or not .

Try using fresh batteries.

please help guys i got a birthday party to do tomorrow now it flashes but the picture comes out dark ...

musashi wrote in post #12103777
Try using fresh batteries.

im going to go get some thanks .

are you using a 50D? the sigma flashes had issues with the 50D... i had to send my ring flash to get its firmware upgraded.. took a week, but free.

problem fix the old batterys i put in wasn't charging it right i replace with new ones now it works like nothing now .

That should have been the first think you did in troubleshooting, instead of having a heart attack.

This thread reminded me (sorry, Perry):

https://photography-on-the.net/forum/showthre​ad.php?t=455916

i know i feel stupid for these threads but here is my first flash photo

i hope this photo brings me back some credibility

lol the damage is done man

We're all here to learn and have some fun.