A review of the Nikon D40 and D40x digital cameras by Nikon expert Thom All of those things come into play when choosing between a D40 and a D50, You can find the full comparison of current Nikon DSLRs here if you want the full list.
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You mean that information isn't your owner's manual? What? What do you mean you lost it? Okay. Here's a link to Nikon's support page for the D40X. There may be some information there, other than the battery identification, that you can use.
Yes in non i-ttl auto and manual
Nikon D60 better dynamic range in the recorded images, plus newer processer.
Battery and memory card installed?
The price of the Nikon d40x online price can varie depending which retailer product is purchased from. You can check prize comparison sites to check different prices against man different retailers.
Yes but only with manual focus.
Yes, it will fit. However, you will still need to see if the lens you have has or does not have features like autofocus or CPU connectors that will carry all the info that your camera needs... If it is a Nikon Lens it will work fine. So will others like Sigma, Tamron and Tokina. Carl Zeiss may not give you all the functions but will work in manual mode.
i bought one....doesn't appear compatible
Generally, you can with all cameras. All you need is a shallow depth of field. You can achieve this by using a low aperture (ex. f/2.8, f/1.8) The lower the f/#, the shallower your depth of field will be.
The newest Nikon D3000 is the best. Not only is it newest and has all these new features, but it has more megapixels and would be the same price as the other two. The Nikon D40 is great and all, but it only has 6 megapixels, and is not good in low lighting which gets REALLY annoying.