last week I got this pic, Corona Australis, with the Canon 5DH and 300mm f2.8 lens both from Bert. I used a f3.5 external aperature stop. No filters.
12x10 minutes ISO200.
Full size version
here
Fits in a fair bit more then the 350D.
Note: file name says "350D" but it was shot with the 5DH.
hand guided as usual.
Scott