|There is one exception to this general rule, however. That is prime focus astrophotography done with a video camera, such as digital eyepiece. With a digital eyepiece in place of a regular eyepiece you can take incredible images of the Moon, Sun (with appropriate filter) and planets at the prime focus of your telescope. In fact, you can even do this type of astrophotography with our SkyWatcher Dobsonians and other alt-azimuth mounted telescopes. |
Digital Eyepieces can be used with virtually any type of telescope because they take pictures of very short duration and thereby avoid trailing. Consequently, they work exceptionally well on the bright objects like the moon, sun and planets. But for this very same reason, they do not work well on dim, deep space objects, like nebulae. Imaging of dim nebulae requires long exposures with sensitive cameras and highly accurate tracking.
That is the domain of long-exposure prime focus astrophotography, which is discussed a bit later (see next page).