Astrofotography and Spectroscopy - The Differents
Spectroscopy
- Simply substract the backround
- Results also at light pollution sites
- Many (bright) objects
- Seeing independed - slit
- Guiding errors, bad collimation errors effective loose only light and need longer exposure
- Spectra processing is only data reduction and calibration
- Spectral processing and calibration are not easy for beginners
- Only "few" spectropists
Astrofotography
- Narrow band at light pollution sites
- Few Objectes for narrow band compare to stars
- Long expoure time over many sessions
- guiding errors, bad collimation bad for images
- Seeing problems
- Many good programs for image processing
- Image proceesing after data reduction is more art then science
- Many astrophotographs