I must first apologize for resurrecting a thread which is several months old. That being said, however, I could not read this thread without the advice given to the question at hand necessitating a response.
I am a photographer and have written many articles on various subjects of photography; most of my articles being aimed at novices to provide them with a better grounding in said subject.
The advice provided to pseudofy is well intentioned, but much of it is not even touching on the core of the problem in question.
What we have at issue here is distance; the moon itself being, on average, roughly a quarter million miles from earth. Discounting the vacuum of space, the distance between any two objects above ground, not accounting for obstacles, is filled by air. Though we like to think of air as pure and clean, it is filled will dust particles it gathers naturally.
Visible light is measured in wavelengths. Longer wavelengths toward the infrared spectrum, and shorter wavelengths toward the ultraviolet spectrum. Though we can get into a discussion about the various affects of different atmospheric properties on different wavelengths, for the purpose of simplicity, I will concentrate on the most common properties of air and its affects on the visible light spectrum.
The primary wavelength with which we want to concentrate for the purpose of the question at hand is that of the shorter wavelengths toward the ultraviolet spectrum. Being that ultraviolet light is of a shorter wavelength, meaning it radiates at a higher frequency (wavelength is a reference to length it takes for a a particle wave to alternate between two properties and not a physical measure of the length of the particle wave), it has more of a tendency to reflect off of airborne particles in the atmosphere (this is not the same thing as bounce associated with ionic activity in the atmosphere).
Being that shorter wavelengths of light reflect off of particles in the atmosphere and bounce back to earth in more abundance than longer wavelengths, this creates a preponderance of coloration tending toward the ultraviolet spectrum; this is a condition often referred to as atmosperic haze. Though our eyes are less sensitive to the UV wavelengths, and thus less noticeable to the naked eye, film and CCD sensors are quite sensitive to this effect, and will record such effects accordingly. The color spectrum most affected by this and noticeable is UV, Blue, and Green.
What does this mean in the simpler end result? Pictures taken outdoors, particularly at distances, have a tendency toward a coloration of the shorter wavelengths of light, especially as distance increases. Another effect of this is haze is that it can make a picture appear to be out of focus.
There is, however, a solution to this problem, with varying degrees of success. The use of a filter which blocks out UV light can reduce the effect of atmospheric haze. UV and Skylight filters will accomplish such a correction. Though there is no 100% correction, either filter can provide enough correction to effect a good capture from such conditions.
Another recommendation I make, when there is a lot of distance involved, is the use of FLD (fluorescent) filter. The FLD filter has a stronger filtering effect than a skylight filter, as it is designed to block out the tendency toward green cast produced by fluorescent lights in photography.
This also gives us another useful solution for digital camera users who may not have a filter to use, or even a filter ring on their camera. When presented with a shot that includes a great distance outdoors (read that as greater than 100ft), you could take some shots for backup using the fluorescent mode of your camera.
To get back to the picture at hand in this thread, the green and purplish casts are likely coming from haze. The focus, though some of that could be slight camera shake (though I doubt it as there should be some ghosting in the image if such was the case), is soft due to the haze itself. Though you cannot see this with the naked eye, that well (except on hot summer days you can get an idea of what haze looks like to film and sensors), it is picked up by the camera.
You could try color balancing filters when shooting such a situation. Though you can use color balancing in an image editor, the color balancing is not going to improve the softness of focus in an editor, but it can improve it when manually applied to the camera.
The suggestions for using a tripod and keeping your shutter speed above 1/60 when handholding a camera are all good suggestions, but that is not the problem at hand.