I know that these are discontinued models. Their main appeal is the "bulb" exposure setting that allows exposures of several minutes duration. Has anyone experience with either or both, especialy with regards to astroimaging and can say which model gives sharper, less noisy images, or other relevant considerations? The images will most likely be taken thru a driven telescope, but not likely for more than 5 minutes (due to potential field rotation on driven alt-azmuth mount).
I am not considering DSLRs right now due to weight and cost considerations. These two models have features that appeal to me, including 3 second self-timers (to eliminate shake after pressing the shutter) which other camera brands such as Olympus don't have, even those with bulb settings (usually they have one or the other -- I need both).