all has been said before, you can get focal reducers but in all honesty i wouldn't bother for the ED 80, as it in itself is a great scope specifically targeted at wider field. Plus a focal reducer will actually make your image wider again...
This is why you have scopes dedicated for different aspects of photography, or different CCD's. for instance the 350d does a great job for fitting in ultra wide fields like Carina, though the DSI is great for galaxy's as they are generally around the 10 arc seconds range.
Choose the gun for the gun fight no use taking a cap gun to a high noon shoot out!
