The
Moon is one of my favourite photography object. Photographing the Moon
at focal length less than 1000mm is quite easy. However, high resolution
and magnification images of the Moon is very hard to achieve.
You'll
need to have a very steady mount. The reason is that the exposure for photographing
the Moon at high magnification runs into seconds, usually about 3 or 5
sec on ASA400 film. The most common reason for unable to achieve good print
of the Moon is vibration during exposure and sometimes it came out as under
or over expose.
However,
recently, I was able to take countless high quality images of the Moon.
The reason lies in the CCD which I had acquired few month ago.
My
CCD camera is originally a security camera. The detector is a 1/2 inch
CCD chip which has a sensitivity of 0.03lux. That's pretty impressive since
most CCD in camcoder is about 3lux. And we can't use camcoder because it's
heavy.
For
imaging, the CCD is connected to my computer via a video capture card.
The card have an input for video signal. The image on the PC screen is
of real time. Whenever, the condition is good, I will save the image as
either bmp or other format.
The
raw images is seldom impressive. Enhancing the images is done using Adobe
Photoshop. I was very thrill is the images so far. However, the CCD can
only capture images of bright object, ie the Moon, Jupiter, Saturn, Venus
and stars down to magnitude 7 or 8.
Check
out the images yourself. What do you think?
This image
of the Moon is taken on 20th April 1998. The time is about 6am local time.
Since the CCD field of view is
small, I have to take about 12 images to cover the whole Moon. Then I joined
them together using Adobe Photoshop. The actual images are in B&W but
I added some colour to make it more realistic.
This is another view of the Moon.
It was taken about one day after the first quarter, a couple of weeks before
the previous image was taken.
Here is some example of how the individual images look like.
The raw image without any enhancement
done.
The image after adjusting the brightness
and contrast.
Here is some of the more famous crater of the Moon at high resolution.
CLAVIUS
COPERNICUS