When does the ma'mum say "Ameen"?

The questioner : His EminenceThe Shaykh : Regarding the hadith of the Prophet (peace and blessings be upon him) concerning the "Ameen" of the believers, meaning in Surat al-Fatihah, for example, the imam says: "And not the astray," and the ma'mum naturally says: "Ameen." I do not know whether the imam says "Ameen" and then the ma'mums respond behind him with "Ameen," or whether they say "Ameen" as soon as he says: "And not the astray"?The Shaykh : When he says: "And not the astray," they say: "Ameen."

The questioner : Even though Shaykh Al-Albani says that this is contrary to the evidence.

The Shaykh : First: May Allah reward you! We do not allow anyone to mention a specific scholar to us.
You may only say: "Some scholars said," but you must never mention so-and-so or so-and-so in our presence; we do not want that.
However, if it is Abu Hurayrah (may Allah be pleased with him) who narrated: and he is the one who narrated: or, "When he says Ameen, when he begins the Ameen, then say Ameen." The meaning is not: when he finishes the Ameen, then say Ameen. The hadith explains part of itself. If this hadith is narrated: we understand the meaning of his statement: to be: when he reaches the place of the Ameen, or when he begins the Ameen, say Ameen with him.