Yes, the D50 or actually any other larger pixel based camera will pickup up a better photon collection, but the problem with the D50 is internal Noise. Its just too much noise, thus the signal get washed out. But still i can Bin the D100 which would eat the D50 alive.
The best so far is the D100, or the D70 with the filter removed.
Price wise, the D200 is sort of the Canon 30D now, but it has a better sensor, and with winter here now, the camera is going to be around 10 deg or less, so noise will be much better..
But like i said earlier, doesnt matter too much with the noise, as the sensors QE is so much better that you could afford a little loss to noise. Just wander how much better it would be if the D200 had no or modified filter..
That would just kick so much arse.
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