@Jason - I am using used DSLR. To be specific a crop body aka Nikon 1 S1 with very less shutter count (was around 700). It's got crop factor of 2.7x which turns my 28-210mm lens to 75.6mm to 567mm. Perfect for that extra reach.
I picked up the used DSLR to learn photography and got lucky with a messed up auction and got the camera for some 30 USD (Was a good score). Lenses are 28-210 and 70-200 as of now. Next goal, something around 300mm (close to 900mm with crop factor). Also, these lenses that I am using a Manual FD lenses. So far good pics for the amount of money I shelled out. Aim was to get the cheapest gear to get the best astro shots. The only problem with the super high crop factor is that I need 9mm lenses for it to actually go wide-angle.