I wanted to practice photography with
flash so turned off the room lights and tried to take a photo but there is a circle that shows in viewfinder when the camera has locked the focus on something, well I couldn't get that circle to show, meaning it wasn't able to focus. So as much as I press the shutter button it resists and doesn't allow me to take a picture.
However I remembered that I could have turned on the focus illumination light to help it focus maybe that was my mistake but other than than is there other things I should know about?
Here is what I was trying:
I was in
Aperture mode, with
f 1.8 and
Nikon D-810 which they say is great for focusing at dark.
The flash wasn't the camera flash, I has just bought a bigger flash that sits on top of camera, one of those.
So in these situation should I for example switch to