Sorry--in the first line of my reply I meant MORE time, not less. - ED

Shutter speed will depend partly on the phase of the Moon; a thin crescent will need less time at the same f# than a "half moon" (quarter of cycle) or a fll moon. Here are some estimates for ASA 200 @ f/11: thin crescent,1/8;
wide crescent, 1/15, quarter phase (half moon),1/30, gibbous, 1/60; full, 1/125. Try slightly longer exposures also. Your camera should be on solid support (tripod), but will do fine at 600 mm fl plus. With a telescope and anything over about 50X you need a drive to counter the earth's rotation & prevent blur. BRACKET!
I'm an amateur astronomer and have taken lots of lunar photos with film, but am just getting into digital photography. Also, I lack the computer skills to do attachments. 'Hope this helps a little. -ED

Wendy, that's a lovely photo of a wonderful animal. Ouls are common at my place in Central Texas also. How did you ever get so close in the daytime? - Ed

pgl---I think your photos are lovely. I've used firm for many years, but am just getting started in digital. --- Ed