I sold an entire Olympus DSLR system for a FZ50 and was very happy for over two years of heavy and frequent use. The FZ50 was/is still my favorite camera. One of the things that did allow me to go from a DSLR to the FZ50 is the hotshoe on the FZ50, which is one of the features that Panasonic wisely included in the FZ100 that's not present in the smaller FZ models. But the hotshoe does you no good if you need to be able to shoot in low light without using a flash. What saved me going from a DSLR to the FZ50 is that most times (most -- not all) I could just keep the FZ50 at ISO 100 and use a flash. Sometimes I could bump it up to ISO 400, but if I went as high as ISO 800 things got ugly pretty quickly. From what I understand, the FZ100 offers similar, limiting performance despite the new sensor. So if you can't use a flash, then you're MUCH better off sticking with your D50 or (like others have suggested) keeping both.
For what it's worth, I sold my FZ50 about six months ago and bought a Pentax KX DSLR. There's really not too much difference in carrying the two kits, since in order to get the similar range of the two lenses I carry with my KX (with one mounted to the body), I had to bring along my Panasonic LW55 wide angle adapter. I also
HAD to have a flash for the FZ50, but I admittedly still carry a flash for my KX, too. So, I'm using the same bag/backpack, kit weighs about the same, with the brand/logo looking so similar to the casual observer (Panasonic Lumix and Pentax KX), most people didn't even notice that I got a new camera. Okay, the dear wife noticed, but that was from the credit card bill.
I follow more of a Kernow rule for reselling cameras -- if/when you can get a good price for it, sell it. If you can't, there's no point in getting rid of it if you think you'll use it in the future (even infrequently), especially when there are some things the FZ100 simply cannot do that your D50 can.
--
Chris
Effzeeone now has a...PentaxKayEx ???!!! WHAT?!
(Gear in profile)