7D built in flash

[Alan Campbell]

I don't know if i am being stupid or not but when i tried to use my built in flash indoors while camera in TV mode it fires but not enough to light image 5 ft away but when on fully auto (green square) it lights perfectly.
Am i doing something wrong or is the camera faulty
help much appreciated
Ive tried adjusting the flash compensation whilst in tv mode but this makes no difference
Alan

[colin C]

Re: 7D built in flash

I hate it when I can't remember why, but use it in Av mode and it should work OK.

Colin

[Alan Campbell]

Re: 7D built in flash

Just tried av mode Colin but shutter speed is too slow for hand holding .
is this right
Alan

[SamFisher]

Re: 7D built in flash

Av measures the ambient light then adds a burst of flash to light the f/g resulting in a well exposed b/g and properly lit f/g
This is probably why your shutter speed was long.
I tend to use P if its just for a quick flash lit snap

Mike

[Hereford_EOS]

Re: 7D built in flash

Just read this and in support I got my 7D out and positioned 5 feet away, set the built-in flash and used Tv mode without a problem.
I had to put the light on to be able to focus as it's now dark (23.10pm) but all fired nicely. Used a wine bottle as a subject.

[Alan Campbell]

Re: 7D built in flash

Thats exactly what i was trying to do Mike ,take a quick snap but the flash only works with enough power in GREEN SQUARE or CA mode.
I was trying to take a quick snap without using my speedlite.
I tried P but results were same as TV
Alan

[Alan Campbell]

Re: 7D built in flash

Stephen ive just ried a shot in tv and upped the iso speed to 400 and it seems ok,i thought if you used flash the iso did not matter.
when in green square mode the s / speed was 60 ap 4.0 and iso 400 so i upped the iso to 400 in tv mode
this photography lark can be confusing for the simplest of things
Alan

[DrJon]

Re: 7D built in flash

Try this one:

http://www.eos-magazine-forum.com/showthread.php?3964-Help-Needed-Flash-Sync-Problem-Canon-EOS-7D-amp-580-EX&p=26100&viewfull=1#post26100

Or the longer version:

http://www.eos-magazine-forum.com/showthread.php?3876-camera-problem&p=25290&viewfull=1#post25290

Ah, nearly tomorrow, I should be in bed, good luck...

[Trevoreast]

Re: 7D built in flash

Hi Alan,

What ISO are you using in TV, P etc ?

I think in green square mode the camera would increase the ISO in dark condtions, that could be the difference.

OOOPS sorry, I did not see earlier reply

Trev

[Hereford_EOS]

Re: 7D built in flash

Stephen ive just ried a shot in tv and upped the iso speed to 400 and it seems ok,i thought if you used flash the iso did not matter.
when in green square mode the s / speed was 60 ap 4.0 and iso 400 so i upped the iso to 400 in tv mode
this photography lark can be confusing for the simplest of things
Alan

It's all a learning curve, sometimes the most simple things are difficult until you know how.
You won't get it wrong again, so it's on to the next problem and so on...
I never mentioned ISO as I thought that was straight-forward, to shoot at a lower ISO then you need a longer exposure in poor light to compensate and vise versa. I try to avoid ISO settings above 400 if possible and therefore I am looking forward to the new 7D firmware where you can limit the auto ISO.

[Alan Campbell]

Re: 7D built in flash

thanks everyone for your input so late at night.
Its weird how simple things bother you and you cant sleep
ending up on forums late at night hoping for an answer

cheers Alan

[Alan Campbell]

Re: 7D built in flash

Try this one:

http://www.eos-magazine-forum.com/showthread.php?3964-Help-Needed-Flash-Sync-Problem-Canon-EOS-7D-amp-580-EX&p=26100&viewfull=1#post26100

Or the longer version:

http://www.eos-magazine-forum.com/showthread.php?3876-camera-problem&p=25290&viewfull=1#post25290

Ah, nearly tomorrow, I should be in bed, good luck...

Thanks Dr Jon
hope you had a good sleep

Alan

[Oggie]

Re: 7D built in flash

I use mine in manual mode and set 180th at F8. Seems to work OK. If thereis not enough power in the flash to give the correct exposure I increase the ISO.

[jonesgj]

Re: 7D built in flash

I use mine in manual mode and set 180th at F8. Seems to work OK. If thereis not enough power in the flash to give the correct exposure I increase the ISO.

This usually works for me too, with a little tweak of the settings.

[deefadog]

Re: 7D built in flash

Just seen comment from Hereford EOS about firmware update for 7 D I,m always sceptical about updates, working on the theory that if it's not broken don,t fix it will the update make a lot of difference?