Woohoo! Another moon thread!
I agree with what Jeff said. My recommendations:
-Shoot the 500mm on a tripod. That lens is good enough to get some excellent pics. At 500mm, even the slightest amount of shake will result in poor sharpness.
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Spot meter off of the moon surface. Unless it is a thin crescent moon which can be difficult. Don't worry as much about aperture. Use a faster shutter speed to avoid any motion blur.
-Oddly enough this recommendation is quite important for sharp moon photos: Don't take pictures of the moon at a full moon. This is counter-intuitive, but it is true, and many people are quite disappointed because of this. At full moon the light is reflected right at you and there is very little contrast. Even looking through a telescope a full moon looks lifeless and boring. (Just like direct flash
) When the moon is side-lit the craters start to "pop"
This is a pic taken with my k10d and the 18-250 at 250mm. Handheld, 1/180, f/6.3, ISO 100.
Note that this is an older camera, a "superzoom" lens (that many mistakenly think is not sharp), handheld, and a
crop. Even so, it is reasonably sharp, and doesn't look artificial IMO. I think you might be able to do better with your 500mm, (although I am not familiar with that particular lens).
Also, one request: When you do take a picture of the moon, please try to refrain from cranking the sharpness setting up to "11" in order to make it sharp. There are so many people that do that and it makes for a very artificial-looking picture.
Have fun!
Edit: Here is what I mean about a full moon looking dull. This is a picture taken on the k20d using an 8in SC telescope (2000mm equivalent). Click on the picture for a larger image. No extra artificial sharpening applied. Notice if you look at the center of the moon, it looks dull and maybe even out of focus. It is not. Take a look at the edge of the moon, where the sun is at an angle, and see how sharp and detailed it is.