Yep, you may ask a question
I guess you post this after I commented on 'hijacking' another thread. If this is about that:
- Yes, you may ask for clarification if you don't understand what somebody is saying If I recall correctly however, that was not what you asked for Personnaly I would be careful with it.
- No, you 'should' not ask another question (like what is better for you or which hood you should get or which filter you should use), even if it's related to the subject.
I did (try to) put the reasons down in the other thread why you should not 'hijack'. Confusion (is this a reply to the OP's question or to your question) can easily happen if people don't quote. And frustration (mostly by the OP) as he/she expects a reply to his/her question only to find out that it's to your question and not relevant to his/hers. And your question might take over the thread (all replies go to your question) which is even more frustrating for the OP.
So yes, in general I would start my own thread (and refer to the other one if necessary).
PS I have been in doubt if I should post this or contact you via PM. Eventually decided to post.