✔ 最佳答案
Officially, it is case dependent (it depends on your seriousness of your conviction).
Unofficially, no need to apply - as you have at least 90% chance of denial, especially when you were sentenced for imprisonment.
You are encouraged to apply, but not expect too much.
For what it worth - as a part of application, you are required to provide your conviction detail.
2013-02-13 18:39:40 補充:
1. Here is the official list:
http://www.gov.hk/tc/residents/immigration/traveldoc/hksarpassport/visafreeaccess.htm
2. Yes