dSLR - how/what to buy
We periodically get asked for the "best" camera to buy when considering a first dSLR.
This is an attempt to provide some thoughts on what to look out for in this rather vexing question and I hope that others will also contribute and that GLOCK, or someone, makes it a sticky for others to read in future.
Let me add some parameters here (contributors please note), we are
1.a: not necessarily talking cameras that can be taken underwater
1.b: not, except in general terms, talking cameras of specific manufacturers, personal choice is specifically excluded
1.c: talking dSLRs at the "reasonable" end of the market. If you're thinking of a Leica S-System, just buy the wretched thing but please don't tell me because I'll come over all jealous. Note that the projected price of that one is about the same as a small to medium sized quality car
and some generalisations, some of which are simplistic, but we're actually talking simplistic here
2.a: The camera is, largely, a box for the lenses
2.b: the lenses, largely, do the work of getting the best photograph - it's the glass that counts
2.c: the "translation engine", that which converts the raw bits into something we can see (jpeg/jpg, tiff, eps, whatever) is also a significant factor in this. All the manufacturers have their proprietary engines, and there are others such as PhotoShop. All such engines can have a significant influence on the end product (and there's largely zero that you can do to influence that)
2.e: you might have a Leica S-System in your claw but if you can't take a photograph for nuts you might as well have a Box Brownie there instead. The camera (and lenses) has not been, will never be, built that can compensate for a photographer that doesn't know "the business". Don't know how to use the camera? Don't understand the controls? Don't RTFM? Don't bother. That is exacerbated by the fact that today's cameras have a huge range of electronic options available to make the average snapper's (me) head seriously ache.
OK, here we go:
LENSES:
3.a: are the bugbear of the photographer. Why? Because as soon as you buy them for a particular system you have what is called "legacy lenses" on your hands. This means that unless you now go to the considerable expense of changing everything on your upgrade you are locked into the next upgrade from that particular camera body manufacturer when you may have decided you'd now prefer the offering of another. Note also that some bodies from a particular manufacturer are not exchangeable, even that is a "horses for courses" thing
3.b: you are not limited to just the lenses of that particular manufacturer, in fact you should think outside the square, of the likes of (alpha order) Olympus, Sigma, Tamron, Tokina, the list goes on. Some of these after market manufacturers actually produce superlative lenses which (mostly on an individual basis but it can happen, and often) can be better than those of the "mainstream". Well, unless you're talking Schneider, now there's a lens and a half. 
CAMERA BODIES:
4.a: just as in P&S cameras I really wouldn't go for anything other than the offerings of the established players. If you use the offerings of the likes of "Messrs Yum and Cha" it is possible that support might fall by the wayside
4.b: go for a "series" model camera, such as the Canon 250 to (now) 500 series because they offer great value for money and, just like with the top-of-the-line Mercedes or BMW, what used to be exclusive to the big boys sickers down. My own Sigma SD 14 started with the SD8 (IIRC) and has just metamorphosed into the SD15 yet I can take advantage of the latest "translation engine", my lenses are still perfectly capable, the camera has not changed radically enough to make me want to get the new body and so, I'm a happy bunny.
4.c: The other camera manufacturers, Olympus for certain, would also have series lenses but don't discount the 4/3rds series of cameras from various manufacturers. This is the only size where a number of manufacturers have got together to support a standard, including some serious players and mostly these systems are within the reasonable range with assorted lenses from assorted manufacturers available for all of them.
I welcome contributions to this thread, I'm sure and certain that I've not thought of everything, but I remind you again to restrict it to generalities, rather than "this is the best". Nothing is the best.
I'll also point out, in a very general way, that much of what I've said above will just as well apply to housings, eg legacy lenses = legacy ports.
But I feel that is another subject, which I might address if and when I feel like it. Anyone want to get in before me? Please?
Cheers,
Christian
There is nothing more certain in life than taxes, decompression theory and death - CG