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Many Newtonians will not reach focus for astrophotography, as many new
owners have found out to their cost. All Skywatcher Newtonians are suitable for imaging. If you decide on one from Bintel ask them whether
the one you select will reach focus. If both their f/4 and f/5 models will
reach focus, definitely go for the f/5. Easier to focus, and more tolerant of miscollimation of the mirrors, and more tolerant of different types of eyepieces.
The HEQ5 will handle the f/5 comfortably, that's the rig I use for imaging.
raymo
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