Hello! I bought my first DSLR camera ever... It's the Nikon D850 with an AF-S NIKKOR 35mm f/1.4G lens. I've never owned a Nikon before, or any high value DSLR for that matter. I didn't even know how to attach the lens at first, but YouTube was helpful.
Anyways, after I nervously attached the 35mm lens, I flipped on the camera and attempted to take my first picture. After half-pressing the shutter button, I saw a red FLICKER indicator turn on inside my viewfinder. Does this mean that my lens is not properly attached? Or, is this warning turned on by default? What does it mean?
Thanks.