Originally Posted by
FrankMi
Hi Hope! I see that you have a fairly well exposed image and although it is relatively small in the frame owing to the focal length of your lens, you might want to crop it close to see how far you can go in enlarging the image without loosing detail.
I'm sure you noticed the settings you used to get the exposure as close as this so it might raise a question or two on how you could improve your next moon shot. If the moon is almost directly overhead on a clear night, you have the least amount of atmospheric haze between you and your subject which translates into the both a sharper and brighter image.
We really don't care about how black the night sky is so our exposure settings need only take in the moon's surface, which is a tiny part of the frame at this focal length. Sunlight reflected off a full moon's surface is going to be similar to a sunlit day on Earth reflecting off a mostly gray surface. This is why you have a small aperture, high shutter speed and high ISO.
We don't really need a high ISO as the subject is well lit so we can lower the ISO and in doing so, limit the noise in the image to a minimum. That leaves Aperture and Shutter Speed.
The entire subject is at infinity so without any Depth of Field issues to address, Aperture could be set to whatever produces the sharpest image for this camera/lens combination. Typically that would be two stops down from wide open but it varies with your specific equipment.
And shutter speed? Particularly if you are on a tripod, camera movement should not be an issue. The Moon is relatively stationary in relationship to the earth and with virtually no background, almost any Shutter Speed will work so this is where I would adjust for the best exposure. As the camera's metering system, even using spot metering, can be fooled by the expanse of black, I would also bracket the exposure with multiple images just in case the base exposure is a little off.
Every moon shot is a little bit different, particularly in exposure owing to shooting angle, atmospheric density, and atmospheric haze so it helps to keep practicing.
I hope this helps!