Simple, just bring:
1. Birth certificate of baby
2. Marriage certificate of you and uour husband
3. Take Baby's photos (refer to application's photo specification requirement)
Visit Canada Consulate in HK's website, fill in the application form for "First Time applicant for citizenship"
晞晞爸, is it necessary to apply for a Canadian passport for the bb now? I gues ...
it really depends on whether you really need it or not.
I agree with you that HKSAR Passport is good enough to travel to most of the country.
For me, one of the reason why i apply for my son at this early stage is that i need to take him to Taiwan to visit my grandma, with a HKSAR passport, my son needs to get a visa (first time application) which takes several weeks... whereas with a Canadian passport, my son can just fly there without any visa (14 days) which is more convenience....