pointer iterator interaction

Ok, this should be fairly easy for most of you (at least I hope so),
but not for me:

Let us say we have got the following elements:
    std::vector<Entry> models; //Entry is a struct
    std::vector<Entry>::iterator modelIterator;

In a method, I am currently writing, I need to get a pointer to an
entry in the vector.. I thought of the following:

Entry* MyObject::getNextEntry() {
    Entry* tmpEntry;

    if (modelIterator == models.end()) {
        return NULL;
    } else {
        tmpEntry = modelIterator;
        modelIterator++;
        return tmpEntry;
    }
}

Unfortunately, this does not work, I get the error message:
   error: cannot convert `
       __gnu_cxx::__normal_iterator<Entry*, std::vector<Entry,
       std::allocator<Entry> > >' to `Entry*' in assignment

I do not really understand this: As far as I understood it, an iterator
should be a pointer to the elements of the vector, and tmpEntry in the
mehtod above is nothing else than this..

How can I get a pointer to the element to which the iterator is
currently pointing?

Thanks a lot in advance
Tim