d90 problem

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steve waugh

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stephen
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Hi Guys
I'm very new at this camera stuff and recently
I have been trying to use my sb900 as a slave
with my built in flash as commander.
I have followed the instructions from the
manuel,the idea being the built-in set to -- so
that it does not fire and the sb900 set to TTL
so that it does.
The problem is that the built-in fires as well
as the sb900,I may not be reading the instructions
correctly,or perhaps the camera is faulty,anyway
can anybody help?
Cheers Steve.
 
steve waugh said:
Hi Guys
I'm very new at this camera stuff and recently
I have been trying to use my sb900 as a slave
with my built in flash as commander.
I have followed the instructions from the
manuel,the idea being the built-in set to -- so
that it does not fire and the sb900 set to TTL
so that it does.
The problem is that the built-in fires as well
as the sb900,I may not be reading the instructions
correctly,or perhaps the camera is faulty,anyway
can anybody help?
Cheers Steve.
Click to expand...

I am pretty sure that the pop up has to fire to trigger the slave, albeit at a reduced power.

Ken Rockwell has an easy to follow guide to remote flash use LINK
 
The built in flash has to fire in commander mode, it is the way the camera sends the exposure information to the SB900. The built in flash does not add to the exposure of the picture. If you find it a problem Nikon do a IR filter that fits on the hotshoe that covers the built in flash.
 
Davec223 said:
The built in flash has to fire in commander mode, it is the way the camera sends the exposure information to the SB900. The built in flash does not add to the exposure of the picture. If you find it a problem Nikon do a IR filter that fits on the hotshoe that covers the built in flash.
Click to expand...


SG3-IR...

images


Cost about a tenner from most good Nikon retailers.
 
Thankyou again,
Me being me,I read the manual page 188
and reading"the built-in flash does not fire" I
took it at it's word.
knowing the built-in has little or no effect is
good news,a little further on the learning curve!
Rgds Steve.
 
Flash In The Pan said:
SG3-IR...

images


Cost about a tenner from most good Nikon retailers.
Click to expand...

Graham, as Usual you fill in the technical info for me:thumbs: Answering threads on a blackberry is a royal pita as you can not look up the important info you need.
 
Flash In The Pan said:
SG3-IR...

images


Cost about a tenner from most good Nikon retailers.
Click to expand...

Aren't these generally for cameras that do not have CLS where you are using the popup flash to fire a manually set slave flash?

CLS should fire the popup flash a fraction of a second prior to the exposure and at a low level to tell the off camera slave what to do so the 'pre flash' which you see from the popup won't affect your exposure.
 
andephotographic said:
Aren't these generally for cameras that do not have CLS where you are using the popup flash to fire a manually set slave flash?

CLS should fire the popup flash a fraction of a second prior to the exposure and at a low level to tell the off camera slave what to do so the 'pre flash' which you see from the popup won't affect your exposure.
Click to expand...


No, they're for use with CLS. f you put that over the onboard flash when you want it to trigger an optical slave it won't work, as it blocks the visible light emission and only allows the ir part through.
 
Chaps,
Can I take it that I should get myself an sg-3 ir,
just to reduce the possibility of that slight light
source at close range.(please say yes!)
Steve.
 
Up to you, I ended up getting an SU800, but that's a slightly more expensive answer to the problem ;)
 
Flash In The Pan said:
No, they're for use with CLS. f you put that over the onboard flash when you want it to trigger an optical slave it won't work, as it blocks the visible light emission and only allows the ir part through.
Click to expand...

I'd have to disagree with you having triggered studio flashes and off camera speedlights with popup non CLS flash, camera mounted speedlights and hotshoe mounted ir triggers. I'v also used a popup non CLS flash with a DIY shield infront of it to stop it affecting the exposure to trigger studio flash heads and off camera speedlights.

I thought the the reason the shield sat away from the flash rather than fitting closely was to allow the flash to escape sideways to trigger slaves while stopping it going forwards and affecting the exposure.
 
andephotographic said:
I'd have to disagree with you having triggered studio flashes and off camera speedlights with popup non CLS flash, camera mounted speedlights and hotshoe mounted ir triggers. I'v also used a popup non CLS flash with a DIY shield infront of it to stop it affecting the exposure to trigger studio flash heads and off camera speedlights.

I thought the the reason the shield sat away from the flash rather than fitting closely was to allow the flash to escape sideways to trigger slaves while stopping it going forwards and affecting the exposure.
Click to expand...

Nikon's CLS system works on infrared, the idea behind the SG3-ir is to block the visible light from the onboard flash and only allow the ir portion through to trigger the flashguns.
 
So guys I am "non technical",will this thing
allow ir connection and reduce the camera flash
at close range.
If so,I should buy it.....yes?
Steve.
P.S.whether or not it works via ir or light escaping
sideways,if it works,it works.
You guys know...I don't.
 
Last edited:
steve waugh said:
So guys I am "non technical",will this thing
allow ir connection and reduce the camera flash
at close range.
If so,I should buy it.....yes?
Steve.
Click to expand...


Yes, it will eliminate the contribution of the onboard flash. It's up to you whether you buy one, but at the end of the day they're only a tenner....
 
steve waugh said:
So guys I am "non technical",will this thing
allow ir connection and reduce the camera flash at close range.
Click to expand...

Yes

steve waugh said:
If so,I should buy it.....yes?
Steve.
Click to expand...

I'd try a loop of duct tape or the like to block the flash going forward to your subject but let the flash and IR signal out the side to trigger your slaves first. It worked with a D50's non CLS flash to simply trigger slave units and flash heads so might not work with the more complex signal sent from a CLS popup but I'd at least try it before you go and spend a tenner on the SG3-IR.
Try it with your hand infront of the flash actually, that should tell you if simply blocking the flash from going forward will still allow it to trigger your slaves.
Don't put anything right over the popup, that'll block everything, you need something to block it going forwards but let it out the sides.
 
Just out of curiosity I just tried it with my D200 popup set to commander and my sb800 set as remote, holding my hand about a half inch infront of the popup still fired the sb800which was a few feet diagonally infront of the camera.
 
Well finally this non-tech block can add something
not a lot but I did place my hand over the built-in
flash and the 900 still fired.
Now guys what does that tell us?
I will however buy one.
Many thanks...
Confused Steve.
 
andephotographic said:
Just out of curiosity I just tried it with my D200 popup set to commander and my sb800 set as remote, holding my hand about a half inch infront of the popup still fired the sb800which was a few feet diagonally infront of the camera.
Click to expand...

Was the SB800 was in SU-4 mode (optical slave) or CLS?
 
Flash In The Pan said:
Was the SB800 was in SU-4 mode (optical slave) or CLS?
Click to expand...

"Remote" which is CLS as you can adjust it's power from the commander (in this case the camera).
It fired because it picked up the flash that escaped sideways, I didn't completely block the flash, just held my hand about half an inch infront so it wouldn't have affected my exposure.
I'd hazard a guess that the SG13-IR was not an IR filter, but simply a flag to stop the flash affecting the subject infront of the camera. If it was an IR filter, why not make it fit closer to the popup to block all the visible light?
 
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