Voting on the question is currently +3/-0 and there's an affirmative comment with two upvotes as well.
If there are no further objections, I'll go ahead and start adding the eyepiece tag to the estimated 50 questions where it's appropriate. As usual I'll do it in smaller groups so as not to overwhelm the active queue.
I estimate that roughly 50 questions ...
I was the OP of the question that uhoh mentioned in the question and I just used the "resource" tag to search for questions similar to mine. The presence of two similar tags of the same meaning is just misleading and may cause the creation of more duplicate and redundant questions.
So, unless the two tags do have different meanings, is it possible ...
The only problem with the tag as-is is that it doesn't appear when you search for "CCD" :-)
Also, would a future "CMOS" tag be appropriate, or would an all-encompassing "imaging devices" or "photon sensors" tag be better?