[Utah-astronomy] modified DSLR cameras

DSLR cameras contain a filter that cuts off the infrared and almost all of the hydrogen alpha line that astrophotographers want. The main modification that Cannon did to the 20D to make the 20Da was to remove this filter. I think Cannon stopped doing this because the astromarket is so small and Huetec does this modification to many DSLR models or will sell you a new but modified unit of your choice. DT http://www.sciencecenter.net/hutech/canon/index.htm __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com