Now, I don't have a guided tracking mount. Nevertheless, I've had quite a bit of success with stacking longer focal length shots in DSS, e.g. this one from the PL25: I don't have a fast wide angle, however, and my research online seemed to suggest that trying to stack wide angle shots was a much more difficult process. Well, I went ahead and tried it anyway, with my Samyang 7.5mm f/3.5 FE, out on my street in light polluted suburbia no less. Here's the result: That was a 4x stack of f/3.5, 15s, ISO800 light frames (with automatic in-camera dark frame subtraction enabled). 15s is about the longest where each individual frame does not show star trailing. How did I avoid foreground blur or star trailing? The trick was to do the stack in 2 steps: Stack with star alignment enabled, output in 32-bit float TIFF as star frame. Stack with star alignment disabled (but with other settings identical), output in 32-bit float TIFF as foreground frame. Import both as layers in Photoshop. Blend foreground and star frames and flatten. Continue with rest of PP as usual (down converting from 32-bit as necessary). I'm pretty pleased with the result - I was surprised that a deep sky object, the LMC, showed up. The slightly weird haloing on the horizon wasn't actually a result of the blending, that was there originally as a result of the light pollution. I will have to try again in a darker sky next time.