Absolutely! I mostly enjoy looking at objects on the limits of detection. Sometimes I can detect a particular object one night but not the other and I put it down to sky quality but there may be many other factors, (will get SQM one day).
It’s fun testing different eyepieces this way too, (must be same focal length) for light throughput and contrast (in any given telescope).
Sometimes even averted vision is not enough to detect the target and you need to bump or jiggle the telescope. The eye somehow sees a lag in the movement of the target and it then stands out momentarily.
Edit:
Found this interesting link (Scroll down);
https://www.bbastrodesigns.com/NewtDesigner.html#visual