I have just bought a new Canon EOS 4000D with an Apeman SL 450C speed light. When I take a photograph with the speed light switched off the photographs are a decent brightness. When I switch the speed light on the flash is activated (e.g. room lights up) but the photograph is very dark, much darker than when the speed light is switched on!
I've read the speed light instruction booklet but there's no troubleshooting for this type of problem. I have the speed light in 'TTL' mode which I figure means some type of automatic mode?
Any help for a newbie would be much appreciated!
Please find two pictures below to compare, the darker one is actually the one with the speed light!
Links to actual images;
Images properties. Image 28 is the one with speed light, image 29 is without speed light