Hello,
I am a jewelry designer and am looking to purchase a camera + lenses for photographing my work and would love any advice on this subject. I am not a professional photographer so the camera would need to be "user-friendly".
As has been mentioned there is no one camera that is right for the job. However your request for a "user-friendly" camera really misses the point because unless you are prepared to learn the basics of operating a modern DSLR to understand how to set it up for the job at hand you are really going to waste a lot of time and money.
The idea you can set the controls to Auto and expect the camera to do the job is quite frankly absurd. Find someone who knows how to take macro photos and ask for help. A few hours basic instruction and after you have taken a lot of pictures, another few hours correcting your mistakes.
This won't be the end of your education, this is just to get you started. You will never stop learning.
Here's a couple of suggestions to get you going:
go for a late model DX camera, either Nikon, Canon or Sony. I don't recommend FX as the gear is expensive, the lenses are heavy (and expensive), the file sizes are too big and the DOF is not good enough. Yes I know focus stacking fixes the DOF problem but that takes time and if you have a lot to get through good luck finding the time.
Don't get the cheapest camera in the range, once you get going you will be looking for features that aren't available in the bottom line model.
The comments made about the lens is true, buy the sharpest macro lens you can afford. If you don't buy it the first time around you will be back for one later. And with a DX camera you need a 60mm lens, I have a 90mm which I almost never use. It gets too close. And I am sure someone will want to mention that a 60 on DX is the same as a 90 on FX.
Then there are the accessories. If you don't live somewhere where you have good available light then a light box is essential. It isn't necessary if you receive good sunlight but that does present other issues. I have a floor to ceiling window alongside what passes for my studio. However I have to tape white plastic over the glass to block the yellow rays of sun coming through. All white gold and silver comes up yellow if I don't. Please note I am talking about ambient light, the direct rays of the sun, even through the plastic, are far too harsh.
The items I do need are a tripod (I honestly don't know how anyone can do the job without it), a shutter release and a reflector. One of those big pop-out reflectors that come with a handle. There's nothing like it for directing light straight at gemstones and diamonds to "light them up".
I am currently using a Nikon D7200 which I notice has just been discontinued. If you can pick one up it is an excellent choice but one of the other major brands will be fine. I have a Tamron 60mm lens on the front, a few years old now but it hasn't missed a beat and continually impresses with its sharpness.
My advice is probably not what others will suggest and I am sure others have far more impressive gear but I have been making my living from this for 10 years and if you are serious about taking good jewellery photos then I can tell you this will do the job. Good luck.