First off, shooting a full Moon and getting good contrast takes some good processing skills. When the Sun is shining straight down on the Moon there are very few shadows to enhance the surface features.

A couple of comments:
1) If you have any front mounted filters, remove them! They are an excellent source of reflections.
2) The Moon is a very bright object. Set ISO to 100 and exposure to about 1/250-1/400 sec. to start.
3) Autofocus on the Moon and lock the focus. Check the focus by zooming in.
4) Vary the exposure around these settings and keep shooting until you're happy with the result.

5) The Moon is an astro-imaging target and the Earth's atmosphere impacts its image quality, i.e.: the atmosphere is the last lens in your configuration and can cause the Moon's focus to change and its surface features to 'wobble'. Most serious Moon imagers either shoot a large number of subs (100+) or shoot video then use software to select the best few subs/frames for alignment and stacking to get the best possible result.

A 200 mm lens is short for good Moon photography but a good way to get started. A 500-600 mm lens is a better starting point for great Moon shots. The first attachment was shot with a RX10 IV @ 600 mm (equiv.). A 1000-2000 mm telescope is where you really start to see great Moon features (second attachment)!!

Enjoy!

bwa