Two people I know recently picked up Nikon D40's, and I ended up giving the same bit of advice to them both. Seems appropriate to share it with the internets. This is strictly opinion, so please no debates- if you feel otherwise,
you write about it. :)
1. Watch out for cheap camera gear online- either lens or bodies. They're often refurb, or non-USA warranty. Going forward, I'll probably only buy from
B&H. (Adorama did a shady bait-and-switch with me once. They're on my blacklist now.) 'course B&H doesn't always have everything in stock- like the 18-200VR that I've been on the wait list for going on 4 months.
2. Pick up this strap, and toss the OEM one. I don't know why i waited 3 years to do so:
Domke Gripper Camera Strap 1.5" with Swivel Quick Release.
3. get a good UV(0) filter for the front of any lens you care about. I like "B+H" (not the same same as the B&H Camera mind you) brand, but they can cost a lot. Hoya and Tiffen will do in a pinch. I honestly can't tell the diff, but people claim there are. The filter is sacrificial- it takes the scratches. Get one ASAP.
4. Download the trial version of
Adobe Lightoom, watch all of the videos from
Lightroom Killer Tips, start shooting in only RAW, and postprocess
everything of value.
5. Eventually pick up a bulb to clean your sensor, an iR remote, and a decent tripod. You'll need them all in time- so just get it up front so you have it from the start.
Now for lens.
There are tons of them out there, but they're all a compromise of some sort- either price, quality, availability, etc. And picking lens is sort of like religion: its a debate as soon as you open your mouth. So in short, I'd stick with the kit lens until you can form your own opinion. (Plus not all lens are compatible: the D40 doesn't have an autofocus motor in the body, so you need to get AF lens with motors in them.)
When you either a) have an important event coming and know you'll shoot a lot, and/or b) "outgrow" the kit lens, I'd consider one or all of these:
1.
nikon 50mm f/1.8. Its $100, and super sharp. Its awesome for portraits. Great bokeh, f1.8 means its fast- low light isn't a big issue. Insane value.
2.
nikon 18-200VR. Its spendy, but I've seen very little bad about it other than that. Great all around lens if you can stand the weight. No lens swapping like you'd need to do with primes.
3.
Sigma 30mm f1.4. This will probably be my next lens, rather than the 18-200VR, but its mostly due to personal shooting preferences.