I have limited experience with the 50D (Only played around with it for a few minutes at a couple of shops), being a user of a trusty 400D for almost 2 years, and having used a 450D a few times (Borrowed one), I thought that the button placement and the practicality and overall ability was head and shoulders above both (Which is obvious), what I mean by this is that it is a evolutionary product, maybe from what the others said it can be conduced that the 40D AND 50D are great cameras, but if the differences between the 50D and the 40D are anywhere near the differences between the 450D and the 400D, then you will be in for a big treat (Lighter, more practical and user-friendly, better sensor, etc.)
40D or 50D would suit fine. I started my DSLR journey with a Canon 350D (and still have it). I played with a 20D (borrowed for a while) and loved it (far more than the 350D) but decided to go FF (5D) instead; kind of on a whim.
The biggest thing that you'll get away from with the 40/50D is the noise... the 350D is a noisy camera and it used to drive me nuts. The newer gen bodies give greater detail, sharpness and way less noise. That alone is worth the upgrade.
I honestly dont know what is better as far as cameras go, at least I think your talking about cameras, but what ever you were/are using works just fine so I wouldn't change it unless u have something special in mind for your work.
ich raffs net, wie hier die meisten auf die 350D setzen können.
Ich hätte jetzt gesagt 40D, weil die imo nen besseres Preis/Leistungs-verhältnis bringt. Hab selber schon mit ihr gearbeitet und wenn dir 10MP reichen! Und Live-View hat se auch schon ... grade bei Sachen mit Stativ isses ne ganz sinnvolle Funktion, aber die 350D is mit ihrem Sensor und dem Chip derb Altbacken!
Dont take either. Get camera with crop factor 1.0 or 1.3, stay away from 1.6 crop factor cameras especially if you already got one.
The level of image quality, detail and colors on lower crop factor digital cameras is noticable (I am of course talking about 1.6x crop factor compared to 1.3x crop factor and 1.0x).
So personally I would rather buy used or older 1.3x 1.0x camera than buying brand new 40D/50D.
And _IF_ you really want to buy one of the 3 cameras listed above on your voting list. I would recommend to cut your losses get the good tested and cheap 350D and save yourself lotsa money. If you already got this one, then there is no point buying new one just keep it and use it until it breaks
id go with the 50D it has the new digic 4 processor over the digic 3 in the 40D, unless your trying to save money id go with the 40 d. or if your trying to save money and get good performance but aren't really wanting to go super pro you might want to look into the xsi. its a fantastic camera. i recommend amazon to buy from because they are usually cheaper. good luck!