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Scott don't even think about it. Can you borrow one? It would be interesting to say the least. I just do this to get pretty pictures showing as much detail as possible given the limitations of our equipment and I enjoy other peoples pictures as well.
A cooled astro CCD camera on a 300mm F2.8 would be something else. That is why I bought this fully manual lens. Just to do this! (down the track when cooled CCD's get cheaper) You have in your possession the best manual lens ever built or ever likely to. An astro CCD will not work with a modern electronic lens. My 300mm F2.8L only works on a Canon camera. It will not focus without power from the camera. Unless someone can enlighten me in this regard? Fool the electronics?
Meanwhile enjoy the extra latitude the lens gives your efforts. I certainly am. I have seen a picture with two comets in the one frame taken from a backyard! Plus a few (many) others, all pushing the limits of our limited equipment.
Bert
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