Black point when take picture
My Panasonic Lumix is an excellent material for what i do. no need of extra things. It suits me perfectly.
But, actually it give me some bad results.
For any know reason, some picture i take have a black point on it. the black point seems to appear in some particular situation, like a little zoom or with a more longuer autofocus time.
This give to me some pictures with a black point.
Do you know from which part of the material could be in cause ?
Is it Lens ?
Thanks in advance for any answer you can give me to help.