I tried a wide shot of moon and venus this morning using a Nikon D60 on a tripod. For some reason I could not get the moon to look like a crescent so I am obviously doing something wrong. The settings were f5.6 at 18mm, ISO 400, 15 sec exposure. Any advice would be welcome.
The Moon is not a crescent because the exposure is so long. You can see the really bright part is the crescent, and the part above is the earthshine.
It's always tricky trying to get the exposure right and the beauty of digital is that you can keep trying and check the preview screen until it looks about right.
You should also reduce the dimensions (to say, 800 or 900px wide) before posting on the forum, so that way you won't have to compress the image so much to get it under 200kb.
