The best focal length for a telescope and CCD camera depends on what you want to observe. For general deep-sky viewing, a focal length of 100 cm is a good balance between magnification and field of view. However, for planetary observations, a shorter focal length of around 50-75 cm may be better.
With a focal length of 100 cm, you can see a wide range of objects including planets, galaxies, nebulae, star clusters, and even some comets. However, the quality of the images will also depend on the size and quality of the telescope and the camera's sensor.
The focal length of a telescope can usually be found in the specifications provided by the manufacturer. For a CCD camera, the focal length is typically determined by the size of the camera's sensor. You can also calculate the focal length by measuring the distance from the primary lens or mirror to the focal plane.
Yes, a telescope and CCD camera with a focal length of 100 cm can be used for astrophotography. However, the quality of the images will depend on the size and quality of the telescope and camera, as well as the atmospheric conditions and the photographer's skills.
The focal length of a telescope and CCD camera affects the magnification and field of view of the images captured. A longer focal length will result in higher magnification but a narrower field of view, while a shorter focal length will provide a wider field of view but lower magnification. The quality of the images will also depend on other factors such as the telescope and camera's quality, atmospheric conditions, and the photographer's skills.