So, I'm trying to get all the right pieces and parts together to mount Cano compatible lens on my QHY168C. I believe I'm shooting for 55mm, or maybe 44mm is actually the right value for Canon? Let's assume 44 for this discussion (although I'm happy to be corrected there). My real question is how exact does this need to be and which side can I err on (too close or too far)? I assume being off a bit would mean that you'd have to use the lens' focus ring to bring things to focus (coming back from infinity focus on the lens)? Adding to the complexities is the fact that there will be one of a couple of different filters in the imaging train which further tweaks the length of the optical path. It is all just a little... confusing.
Anyone have thoughts on this, and/or been there done that?