Hi there, I was wondering if anyone can help me please. I am having problems with flash on my Nikon D40x.
I have an SB900 flash and suddenly on auto and TTL mode my images started coming out really dark. I tested with the on camera flash and it was also dim, barely making a difference at all so it must be to do with the camera. I have checked all my camera settings over and over again and they are all the same as I always use in that situation (I do nightclub photography). I have a high ISO, slow shutter speed and maximum aperture, the same settings I always use in the nightclub with flash on TTL mode.

If I put the SB900 on manual mode I can get the flash just about bright enough but as I have to move quickly around pubs and nightclubs photographing groups of people I don't have time to keep changing my settings on the flash as well as the camera. I can't find any info on the internet about someone having the same problem.
Any help would be hugely appreciated!
Thanks

Hi Kathleen,

Welcome to Nikonians!
Sorry to hear of your problem.
Did you inadvertantly dial in negative Exposure Compensation and or negative Flash Compensation?
Is your SB-900 fully seated and locked in the hotshoe?
Are there fresh batteries in the Speedlight?
Are you waiting for the ready light on your SB-900 or the lightning bolt symbol in the viewfinder to turn on before you release the shutter?
Good Luck and Enjoy your Nikons!

Best Regards,
Marty

Hello, thanks for your response.
Exposure compensation and flash compensation are both at 0. I've changed the batteries in the flash and tried a different battery in the camera too and given the hotshoe a wipe in case of dust. Everything is exactly how is usually is, I don't understand! It seems as if there's a problem inside the camera or something but after lots of internet searching I haven't come across anyone else who has had the same problem.
Thanks,
Kat

Hi Kathleen,

Do you have the Aperture stopped down?
What exposure mode are you using?
What is the flash to subject distance?
Could you post a sample image with the Exif data intact?
Good Luck and Enjoy your Nikons!

Best Regards,
Marty