Django ORM - objects.filter() vs. objects.all().filter() - which one is preferred?

Question

Very often I see constructs like

MyModel.objects.all().filter(...)

which will return a QuerySet of the default Mananger. At first al

Answer 1

1. MyModel.objects returns the manager instance. all() return get_query_set(). I think all is there for when you need all objects.
2. I prefer MyModel.objects.filter() cause the other is just one more method call, and I don't need all objects if I do filter :)
3. It depends on the purpose. But if they override a base method of the manager, they return the same result format (eg. a QuerySet)