Possibly a simple problem

O

owenmathias

Suspended / Banned
Messages
1
Name
Owen
Edit My Images
No
New to this site, and as you all seem so friendly I'm going to pose a small question about something that has been bugging me.

I shoot with D3s and a D700. My usual wedding dancefloor set up has been sb900 on camera triggering several 3rd part flashes as slaves on either corner of the dancefloor. This has always worked well, up until a couple of weeks ago.

All of a sudden, even though the slaves are triggering, I am not picking them up in the camera, and therefore missing the nice rim light and crossflash that I've become used to. :shrug:

I am shooting manually at 1/60 or 1/100 with ISO 400-800 and anywhere between f1.4 (50m) and f4 (24-70).

I know this is probably a simple problem as it affects all my cameras except one d700 and I cannot identify why there's a difference.

Thanks for your patience with this idiot.

Owen
 
mike weeks said:
If it was rear curtain they would be captured, there has to be something triggering them outside of the exposure time which would be some form of pre-flash.

Mike
Click to expand...

Probably. I was just thinking that since they are being triggered optically the delay could be long enough to be problematic. Particularly if the sensor isn't in alignment.

I've never had it happen but I don't use optical slaves.
 
I had a similar issue a while back. I could the pre-flash from the mounted flash was triggering the slaves just before the main flash and exposure. Try switching the master to manual (I assume it won't then use a pre-flash to meter).
 
Check that your SB900 (master flash) is in M mode and not ttl/bal aa.
Alternatively if your making use of ttl on the master your 3rd party slaves need to be in the appropriate slave mode, some have a couple of slave options S1 and S2.
eg, S1 maybe standard slave to use with manual flash and S2 to use with TTL flash which will then disregard the pre flash from the master in TTL
Likewise if your master is in M mode, your slaves should be in S1 and not S2 as above.
Hope this helps
 
You must log in or register to reply here.
Back
Top