Well, there haven’t been all that many rumours about the apparently impending Sony A7 IV. We’ve figured it must be coming at some point relatively soon, given Sony’s typical release cycles and the fact that it was possibly a body Sony registered in April, but there hasn’t been a lot of information leaked about it at all.
It seems, though, that an announcement had been planned for mid-September. Now, according to Sony Alpha Rumors, that announcement has been delayed until late October. And, not surprisingly, even after the announcement comes, there will be a limited supply for the first few months due to the global silicon shortage.