Using different lenses and camera- see below for full info
D300 + 500 mm = 750 mm
D300 + 200 mm lens = 450 mm
The best option to photograph the moon is to mount your camera on a tripod and use a cable release to reduce vibration. I manually focus the lens as in poorer light the auto focus doesn't sometime connect. Try ISO 200 to keep the noise down to a minimum and this will give you a setting of about 1/100 @ f/11. You could also try high or lower settings as it all depends on how dark your site is, how clear the moon is and in what phase and where you are located.
Use the longest lens you have at least a 300 mm but longer if possible. Using a 300 mm lens on a DX camera (cropped sensor) will give you 1.5 x the length so equivalent to a 450 mm lens. I use a Nikon D300 and a D7100 which has a built in tele-converter giving you 1.3 x + 1.5 x lens so using the longest lens I have this is a D7100+ 800 mm lens = 1600 mm equivalent giving a close up of the moon