I'm just starting out on macro using extension tube + 50mm F1.8 @F11, but I'm having this horrible haze in the middle of the photo, does anyone know what caused this and how could I fix it ??
try backing up a little and use your focus ring to dail in on the focus and change
your lighting. try this, take a flashlight and shine it on your object, put your camera
in maual mode and dail in for correct expose, take a shot and see what happens.
hope that helped you..
What extension tube(s) are you using ?
As commented above you are either getting light shining directly in the lens or you have a light leak somewhere from the tubes etc not being fitted correctly ?
Brian V.