Imaging techniques a starters guide
I have seen it so many times people come to a star party of an observing session and there is somebody there imaging and the see the images and look in awe. The next comment from them is
"how do i do that"
This is one thing that strikes fear into me every time that i hear it.... the skills which i have developed for imaging have been gained over the last 10 years and they have been gained through a lot of tears and frustration. The biggest challenge then is to slow people down and make them relise that imaging can be done of many different levels and that the option of prime focus imaging with a DSLR may not be the best thing to start with.
There are a number of different ways by which an image of the night sky can be snapped:
- Whole sky imaging with a digital camera and a tripod
- Eyepiece projection with a digital camera and a telescope
- Prime focus photography with a DSLR and a telescope
- Astronomical CCD camera and prime focus photography
|Imaging Type||Camera details||Camera Mount||Telescope details||Telescope Mount||Comments|
|Whole Sky||DSLR or any digital camera||Sturdy tripod||Not needed||Not needed||Simplest form of imaging|
|EyePiece Projection||DSLR or any digital camera||None||Any telescope||Any, does not have to be driven||This can be used to get short exposures of say the moon|
|Prime focus||DSLR / cooled CCD||None||Any telescope||Driven Mount with polar alignment||This is now starting to get more difficult with driven mounts|
|Long exposure CCD images||Cooled CCD camera||none||Good quality refractor or Schmit||Good quality driven mount with correct alignment||This is the end point with this sort of setup it is possible to produce stunning vistas|